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List of Amir's Headphone PEQ filters

sweetchaos

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This is a Parametric Equalization (PEQ) guide based on Amir's excellent headphone reviews! :D
If you need Graphic Equalization (GEQ) guide, please see my subsequent post!

Which EQ software are available?
@Doodski created a detailed post showing all known EQ software.
Read that if you want suggestions on which software are available.

Using Windows?
The 2 most often recommended FREE software are:
1. Equalizer APO - parametric / graphic equalizer.
1608446364294.png

2. Peace - graphical interface for Equalizer APO.
*Optional software*, but often *recommended* in addition to Equalizer APO.
According to latest statistics, for every 4 users who install 'Equalizer APO', 1 user installs 'Peace'.
Both of the software will give you the same result, but they have completely different user interfaces and functionality.
My recommendation is to try both and see which you prefer. ;)
1608453710778.png

What does Amir post with each headphone review?
With each headphone review, Amir posts his PEQ filters (that he creates using Roon software. More info).
Sennheiser HD800S Measurements Equalization 2.png


As you can tell, Amir doesn't post the preamp gain needed for equalization.
So when he's testing headphones, he simply turns the PEQ filters on/off and it allows him to A/B test instantly without changing other variables.

However, to avoid overdriving your headphone amplifier into clipping the signal, it's a good idea to apply a negative preamp gain.
This negative preamp gain will offset the positive PEQ gain, back to a '0' reference plane.
There is no formula to calculate the preamp gain needed, but we can use software to help.

[Optional] How to calculate the preamp gain needed for Amir's posted PEQ filters?
***You do not need to perform these steps, as I've done it for you. This is simply for educational purposes, so you understand where preamp gain comes from.***
1. Read Amir's headphone review, look for Roon PEQ filters
2. Create a .TXT file with his filters, and input values based on guide
Filter 1: ON LSC Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2705 Hz Gain 3.0 dB Q 1.0
Filter 4: ON PK Fc 5400 Hz Gain -3.0 dB Q 3.0
Filter 5: ON HSC Fc 10000 Hz Gain -2.0 dB Q 1.0
3. Open that .TXT file using Equalizer APO (Go to File, Open)
4. You'll see the dashboard:
1608448841093.png

You'll see 'peak gain' of 11.7 dB in red colour.
This means that a preamp gain of -11.7 dB is needed to offset the PEQ filters back to a '0' reference plane.
5. Now we append the .TXT file with this information and it becomes:
Preamp: -11.7 dB
Filter 1: ON LSC Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2705 Hz Gain 3.0 dB Q 1.0
Filter 4: ON PK Fc 5400 Hz Gain -3.0 dB Q 3.0
Filter 5: ON HSC Fc 10000 Hz Gain -2.0 dB Q 1.0
6. Import the .TXT into Equalizer APO or Peace (whichever you prefer)

How to import these PEQ filters into Equalizer APO?
In the video I demonstrated:
1. Copied Amir's Equalizer APO profile for AKG 371 (from audiosciencereview.com)
2. On Desktop, created "akg k371 amir.txt" and pasted the contents
3. ***Optional Step, if you want to see how to import multiple profiles***. Copied the preamp text only, then created a 2nd file called "akg k371 flat with amirs preamp.txt", and pasted the contents
4. Saved both .txt files
5. Cut both .txt files
6. Navigated to "c:\program files\equalizer apo\config". Note: Equalizer Apo won't accept the .txt from another directory on your computer, so it must be in this directory.
7. Pasted both .txt files into the directory
8. Opened "Configuration Editor" (which opens "Equalizer APO Configuration Editor")
9. In the section called "Preamplification", clicked on "Remove" button. (It's not needed anymore)
10. In the section called "Graphic EQ", clicked on "Remove" button. (It's not needed anymore)
12. In the section called "Include", selected "browse" button, changed to "akg k371 amir.txt" (which will import this profile)
13. Selected Green "Plus" icon, to add another section, selected "Control", then "Include (include configuration file)"
14. Selected "browse" button, selected "akg k371 flat with amirs preamp.txt" (which will import this 2nd profile)
15. Once both profiles were imported, showed how to view the filters by selecting green "UP" arrow
16. Showed how to disable and enable one profile at a time.
Overall, took 1min.

How to import these PEQ filters into Peace?
1. Open Peace.
2. ***Must do this once***. Go into Settings, select tab 'Sizes and Amounts Settings', change 'Snap dB Gain' from 0.5 to 0.1, save.
3. When looking at the dashboard, you'll see an 'Import' button, select it.
1608449208841.png

4. Select the .TXT file with Amir's PEQ filters (from this thread).
Example: "Sennheiser HD800S.txt"
Preamp: -11.7 dB
Filter 1: ON LSC Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2705 Hz Gain 3.0 dB Q 1.0
Filter 4: ON PK Fc 5400 Hz Gain -3.0 dB Q 3.0
Filter 5: ON HSC Fc 10000 Hz Gain -2.0 dB Q 1.0
5. This step will over-write all previous filters on screen.
6. Verify the filters are correct, and press the 'Save' button.
7. Name it.
8. Once you do, you'll see it show up on the bottom left of the dashboard.

How to Setup Peace and Import a PEQ Profile:
In the video, I showed the following:
1. Installed Equalizer APO (ignore the error at the end, that's just because it's in a VM) (normally, you would enable your DAC/soundcard, so that Equalizer APO gets applied to that playback device)
2. Installed Peace
3. Restarted
4. Opened Peace, set to 'advanced mode'
5. Went to settings, changed 'snap to db gain' from 0.5 to 0.1
6. Showed how many configurations/profiles are by default
7. Deleted all default configurations/profiles, to keep things clean
Specifically, I deleted *.peace from C:\Program Files\EqualizerAPO\config\
8. Went to ASR, to copy a PEQ profile
9. Created .TXT file and pasted PEQ profile
10. Imported PEQ profile to Peace
11. Cleanup, saved the configuration/profile
12. Showed how to view PEQ filters on a graph
13. Showed how to switch between different configurations/profiles
Overall, took 2.5min.

Want to use another EQ Software?
1. Input the PEQ filters into your software, but keep in mind:
HP = High Pass
LP = Low Pass
HSC = High Shelf
LSC = Low Shelf
PK = Peaking (or "Peak/Dip" or "Bell")
2. Input the preamp gain

Are you using 'MathAudio Headphone EQ'?
If you're using MathAudio Headphone EQ, the software does the preamp gain adjustment automatically, in order to avoid audio clipping.
In other words, just enter the PEQ filters, and don't adjust any preamp gain.
You can tell this is true, by looking at the picture of a PEQ profile, where the highest filter (in the bass) is already at 0 dB.
1610935106211.png

As an Android user who already uses the 'Wavelet' app, how can you import Amir's PEQ profiles?
You can't.
Amir provides parametric EQ profile, but Wavelet was built to use graphic EQ profile only.
UPDATE: I created a way to do this. Please see my other post.

[For Advanced Users] How to compare your headphones out-of-the-box (without EQ) against Amir's PEQ filters?
1. Using your favorite EQ app, create a new configuration by importing Amir's PEQ filters (as illustrated above), save it.
2. Create a 2nd configuration, but this time leave the filters at default.
In other words, make a flat EQ profile.
Then, enter the same preamp gain from step #1 (from Amir's PEQ profile), save it.
3. This will make 2 configurations level matched.
Now you can instantly switch between the two configurations, to see how the sound changes.

[For Advanced Users] How to compare multiple PEQ profiles with each other?
1. Let's say you found 3 PEQ profiles online (Amir's and a few others...) for your headphones
2. Import all PEQ profiles into your EQ software
PEQ profile #1:
Preamp: -3.8 dB
Filter 1: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 2: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 3: ON PK Fc xx Hz Gain x.x dB Q x.x
PEQ profile #2:
Preamp: -5.4 dB
Filter 1: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 2: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 3: ON PK Fc xx Hz Gain x.x dB Q x.x
PEQ profile #3:
Preamp: -4.3 dB
Filter 1: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 2: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 3: ON PK Fc xx Hz Gain x.x dB Q x.x
3. To properly compare all PEQ profiles, you'll need to have them level-matched.
To do this, you'll need to set each PEQ profile to have the same preamp, which should be the highest negative preamp gain.
In the example above, a preamp gain of -5.4 dB will need to be manually overridden for PEQ#1 and PEQ#3 profiles.
Save both profiles.
4. Now you can instantly switch between the profiles, to see how the sound changes.
5. After you've found the best sounding PEQ profile, you'll need to revert the preamp gain back to the original.

[For Advanced Users] What do I do when I have channel-imbalanced headphones?
Some headphones have channel imbalances, where one channel (ex. right) plays at a lower volume than the other channel (ex. left).
Amir makes a note of these channel imbalances in the headphone reviews.
How do you tell if your headphones are channel imbalanced?
Play pink noise for each channel and watch for volume differences, to see if you need to boost the preamp gain on one channel.

Superlux HD668B channel imbalance:
In the Superlux HD668B review, Amir noted a channel imbalance.
He boosted the right channel by +2.5 dB to fix it.
To do this in Equalizer APO, we need to offset the preamp on left channel by 2.5dB.
If you want to try this PEQ profile, use this code instead:

Channel: L
Preamp: -11.0 dB
Filter 1: ON LSC Fc 30 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 50 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 4000 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 5380 Hz Gain -7.0 dB Q 6.0
Filter 5: ON PK Fc 8582 Hz Gain -7.0 dB Q 5.0

Channel: R
Preamp: -8.5 dB
Filter 1: ON LSC Fc 30 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 50 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 4000 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 5380 Hz Gain -7.0 dB Q 6.0
Filter 5: ON PK Fc 8582 Hz Gain -7.0 dB Q 5.0

There are 3 BETA reviews, what are those?
Backstory:
- Sep 30, 2020. Amir got a Gras 45CA headphone measurement fixture (loaner from company), and his first review was RAAL-requisite SR1a Ribbon.
- Oct 15, 2020: His 2nd review (with same fixture) was Audeze LCD-X.
- Oct 20, 2020: His 3rd review (with same fixture) Massdrop X KOSS ESP/95X Electrostatic. He returned the loaner fixture after this review.
- Dec 3, 2020: He announced he purchased a new Gras 45CA-10 headphone measurement fixture and started measuring headphones with it. All of his reviews since were done using the same fixture.
Overall, I called these 'BETA reviews', since they were done with a similar, but not exactly the same, fixture.

How to use 2 DACs on 1 Windows 10 PC, with separate PEQ profiles?
Let's say you want to use separate DACs (and have headphone amplifiers & headphones OR studio monitors hooked up) on 1 Windows 10 pc and want the ability to EQ both DACs separately, using 'Equalizer APO' for Windows.
I've created a how-to-guide here.
What happens if I install 'Equalizer APO' and setup everything up correctly, but it still doesn't work?
Backstory:
1. While setting up 'Equalizer APO' for a friend, I noticed that 'Equalizer APO' wasn't working as intended.
2. He had a pair of studio monitors (with XLR female inputs), and connected them using "dual XLR male to 3.5mm TRS male cable" to his desktop computer's "Line Out" port on the motherboard. His motherboard had a Realtek audio chipset.
3. After installing, properly setting up 'Equalizer APO'. I imported a PEQ profile as I normally would, and tested it. However, I noticed that togging the PEQ profile on/off didn't change the original sound.
4. Of course, I checked to make sure that he had the latest Realtek audio drivers installed. That didn't fix the problem.
Solution:
1. Open "Configurator" (located in C:\Program Files\EqualizerAPO)
2. Enable Check "Troubleshooting Options" box at the bottom
3. Select your primary device (in my case, it was just the Realtek Audio device)
4. Change the drop-down menu from "Install as LFX/GFX (recommended)" to "Install as SFX/EFX (experimental)".
5. Press "OK", and restart computer.
6. After the restart, 'Equalizer APO' immediately worked.
I don't know whether this is just related to Realtek chipset or what. I hope this helps some of you.

Amir's panther ratings:
Poor = Headless panther
Not Terrible = Postman panther
Fine = Happy panther
Great = Golfing panther
Questionable = Panther with hands covering his mouth

How to read my list:
Name of headphone (AMIR'S Panther, COMMUNITY-VOTED Panther)[Sensitivity]US$MSRP
_________________________________________________
List of Amir's headphone PEQ filters (sorted A-Z):

64 Audio U12t (IEM) (Fine, Fine)[28]US$2000
Preamp: -6.1 dB
Filter 1: ON PK Fc 3360 Hz Gain 6.0 dB Q 3.0
Filter 2: ON PK Fc 5000 Hz Gain -1.0 dB Q 5.0
Filter 3: ON PK Fc 8500 Hz Gain 6.0 dB Q 5.0
Drop AKG K7XX (Poor, N/A)[210]US$258
Preamp: -5.7 dB
Filter 1: ON LSC Fc 55 Hz Gain 5.3 dB Q 1.0
Filter 2: ON PK Fc 230 Hz Gain -1.5 dB Q 1.0
Filter 3: ON PK Fc 1000 Hz Gain 4.0 dB Q 1.0
Filter 4: ON PK Fc 1700 Hz Gain -4.0 dB Q 3.0
Filter 5: ON PK Fc 3100 Hz Gain 4.0 dB Q 3.0

AKG K240 55 Ohm (Poor, N/A)[230]US$70
Preamp: -11.6 dB
Filter 1: ON LSC Fc 40 Hz Gain 7.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 1700 Hz Gain 8.0 dB Q 2.0
Filter 4: ON PK Fc 4700 Hz Gain 8.0 dB Q 4.0
Filter 5: ON PK Fc 8100 Hz Gain -4.0 dB Q 4.0

AKG K271 (Fine, N/A)[164]$US118
Preamp: -8.6 dB
Filter 1: ON LSC Fc 60 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 640 Hz Gain -3.0 dB Q 4.0
Filter 3: ON PK Fc 2300 Hz Gain 3.0 dB Q 2.0
Filter 4: ON PK Fc 4600 Hz Gain 4.0 dB Q 2.0
Filter 5: ON PK Fc 9400 Hz Gain -4.0 dB Q 3.0

AKG K271 MK II Chinese (Fine, Poor)[160]US$140
Preamp: -11.6 dB
Filter 1: ON PK Fc 25 Hz Gain 11.1 dB Q 1.0
Filter 2: ON PK Fc 124 Hz Gain 11.0 dB Q 3.0
Filter 3: ON PK Fc 688 Hz Gain -3.0 dB Q 4.0
Filter 4: ON PK Fc 3800 Hz Gain 7.0 dB Q 2.0
Filter 5: ON PK Fc 9400 Hz Gain -4.0 dB Q 3.0

AKG K371 (Great, N/A)[65]US$150
Preamp: -4.5 dB
Filter 1: ON PK Fc 2200 Hz Gain 1.5 dB Q 1.0
Filter 2: ON PK Fc 3915 Hz Gain 4.0 dB Q 4.0
Filter 3: ON PK Fc 6800 Hz Gain -3.0 dB Q 4.0

AKG K701 (Fine, Not terrible)[295]US$250
Preamp: -8.0 dB
Filter 1: ON PK Fc 25 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 227 Hz Gain -3.0 dB Q 2.0
Filter 3: ON PK Fc 1300 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 2281 Hz Gain -2.5 dB Q 3.0
Filter 5: ON PK Fc 3500 Hz Gain 6.0 dB Q 5.0
Filter 6: ON PK Fc 5870 Hz Gain -1.9 dB Q 5.0

AKG K712 Pro (Fine, N/A)[207]US$327
Preamp: -9.3 dB
Filter 1: ON PK Fc 30 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 1350 Hz Gain 6.0 dB Q 2.0
Filter 3: ON PK Fc 3394 Hz Gain 9.0 dB Q 3.0
Abyss AB-1266 Phi TC (Great, N/A)[1030]US$5000
Preamp: -4.9 dB
Filter 1: ON LSC Fc 60 Hz Gain 2.5 dB Q 1.0
Filter 2: ON PK Fc 310 Hz Gain -3.0 dB Q 2.0
Filter 3: ON PK Fc 900 Hz Gain -4.0 dB Q 2.0
Filter 4: ON PK Fc 3283 Hz Gain 5.0 dB Q 2.0
Filter 5: ON PK Fc 13300 Hz Gain -11.0 dB Q 3.5

Abyss Diana V2 (Not Terrible, N/A)[631]US$3000
Preamp: -8.6 dB
Filter 1: ON LSC Fc 35 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 1194 Hz Gain -2.0 dB Q 2.0
Filter 3: ON PK Fc 2705 Hz Gain 2.5 dB Q 3.0
Filter 4: ON PK Fc 3700 Hz Gain 5.0 dB Q 9.0
Filter 5: ON PK Fc 5464 Hz Gain -2.0 dB Q 8.0

Abyss Diana V2 (2nd review)(actually Diana Phi?) (Poor, N/A)[611]n/a
Preamp: -6.3 dB
Filter 1: ON LSC Fc 42 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 120 Hz Gain 2.0 dB Q 1.0
Filter 3: ON PK Fc 1000 Hz Gain -3.0 dB Q 4.0
Filter 4: ON PK Fc 2000 Hz Gain 4.0 dB Q 3.0
Filter 5: ON PK Fc 3696 Hz Gain 4.0 dB Q 5.0
Apple AirPods Max (Fine, N/A)[385]US$480
Preamp: -8.5 dB
Filter 1: ON PK Fc 2000 Hz Gain 5.0 dB Q 2.0
Filter 2: ON PK Fc 4011 Hz Gain 8.0 dB Q 2.0
Audeze LCD-1 (Fine, N/A)[230]US$400
Preamp: -8.7 dB
Filter 1: ON LSC Fc 54 Hz Gain 5.8 dB Q 1.0
Filter 2: ON PK Fc 1415 Hz Gain 2.2 dB Q 2.0
Filter 3: ON PK Fc 1945 Hz Gain 7.0 dB Q 2.0
Filter 4: ON PK Fc 4784 Hz Gain 1.0 dB Q 2.0
Filter 5: ON PK Fc 6226 Hz Gain 8.0 dB Q 2.0

Audeze LCD-24 (Great, N/A)[130]US$3500
Preamp: -8.4 dB
Filter 1: ON LSC Fc 40 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 100 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 1800 Hz Gain 2.0 dB Q 2.0
Filter 4: ON PK Fc 2400 Hz Gain 6.0 dB Q 2.0
Filter 5: ON PK Fc 3900 Hz Gain 4.0 dB Q 3.0

Audeze LCD-X (BETA review) (Poor, N/A)[n/a]US$1700
Preamp: -8.0 dB
Filter 1: ON HP Fc 22 Hz
Filter 2: ON LSC Fc 35 Hz Gain 4.0 dB Q 1.0
Filter 3: ON LSC Fc 80 Hz Gain 4.0 dB Q 1.0
Filter 4: ON PK Fc 3000 Hz Gain 8.0 dB Q 2.0

Audeze LCD-X (2021 Edition) (Great, N/A)[152]US$1200
Preamp: -11.2 dB
Filter 1: ON LSC Fc 31 Hz Gain 6.7 dB Q 1.0
Filter 2: ON LSC Fc 127 Hz Gain 4.0 dB Q 0.8
Filter 3: ON PK Fc 2542 Hz Gain 4.0 dB Q 2.5
Filter 4: ON PK Fc 3700 Hz Gain 8.0 dB Q 4.5
Filter 5: ON PK Fc 5800 Hz Gain -1.0 dB Q 5.0

Audeze LCD-XC (Great, Great)[131]US$1800
Preamp: -7.8 dB
Filter 1: ON PK Fc 25 Hz Gain 7.8 dB Q 1.0
Filter 2: ON PK Fc 1400 Hz Gain -3.0 dB Q 2.0
Filter 3: ON PK Fc 4100 Hz Gain 3.0 dB Q 4.0
Filter 4: ON PK Fc 7900 Hz Gain -2.0 dB Q 4.0
Filter 5: ON PK Fc 12000 Hz Gain -7.0 dB Q 6.0

Audeze Mobius (Fine, N/A)[n/a]US$400
Preamp: -10.0 dB
Filter 1: ON PK Fc 144 Hz Gain -5.0 dB Q 1.0
Filter 2: ON PK Fc 6000 Hz Gain 10.0 dB Q 4.0

Audeze SINE (Fine, N/A)[139]US$450
Preamp: -12.0 dB
Filter 1: ON PK Fc 20 Hz Gain 12.0 dB Q 0.7
Filter 2: ON PK Fc 4700 Hz Gain 9.0 dB Q 4.0
Audio Technica ATH-ADX5000 (Poor, N/A)[316]US$2000
Preamp: -7.5 dB
Filter 1: ON LSC Fc 50 Hz Gain 7.0 dB Q 1.0
Filter 2: ON PK Fc 2212 Hz Gain 5.0 dB Q 3.0
Filter 3: ON PK Fc 4500 Hz Gain -5.0 dB Q 1.0

Audio Technica ATH-M50X (Fine, N/A)[86]US$150
Preamp: -3.8 dB
Filter 1: ON PK Fc 70 Hz Gain 3.0 dB Q 3.0
Filter 2: ON PK Fc 148 Hz Gain -4.0 dB Q 2.5
Filter 3: ON PK Fc 350 Hz Gain 4.0 dB Q 3.0
Filter 4: ON PK Fc 4300 Hz Gain -2.5 dB Q 4.0
Filter 5: ON PK Fc 5700 Hz Gain -2.5 dB Q 4.0

Audio-Technica ATH-R70x (Questionable, Not terrible)[318]US$350
Preamp: -10.0 dB
Filter 1: ON PK Fc 30 Hz Gain 10.0 dB Q 1.0
Filter 2: ON PK Fc 4300 Hz Gain 5.0 dB Q 3.0
Beyerdynamic Amiron Home (Not terrible, Poor)[212]US$400
Preamp: -6.3 dB
Filter 1: ON PK Fc 20 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 210 Hz Gain -3.0 dB Q 3.0
Filter 3: ON PK Fc 1000 Hz Gain 4.0 dB Q 2.0
Filter 4: ON PK Fc 1270 Hz Gain 3.8 dB Q 2.0
Filter 5: ON PK Fc 8500 Hz Gain -4.0 dB Q 6.0
Filter 6: ON PK Fc 14100 Hz Gain -7.0 dB Q 6.0

Beyerdynamic DT150 (Fine, Not terrible)[400]US$210
Preamp: -4.1 dB
Filter 1: ON LSC Fc 30 Hz Gain -3.0 dB Q 1.5
Filter 2: ON PK Fc 151 Hz Gain -10.0 dB Q 3.0
Filter 3: ON PK Fc 3700 Hz Gain 6.0 dB Q 5.0
Filter 4: ON PK Fc 4315 Hz Gain -7.0 dB Q 5.0

Beyerdynamic DT 880 600 Ohm (Not terrible, N/A)[948]US$200
Preamp: -4.3 dB
Filter 1: ON LSC Fc 60 Hz Gain 4.0 dB Q 1.0
Filter 2: ON PK Fc 210 Hz Gain -2.0 dB Q 2.0
Filter 3: ON PK Fc 4300 Hz Gain 4.0 dB Q 4.0
Filter 4: ON PK Fc 5700 Hz Gain -6.0 dB Q 5.0
Filter 5: ON PK Fc 8300 Hz Gain -7.0 dB Q 5.0

Beyerdynamic DT990 Pro (250 ?) (Poor, N/A)[704]US$160
Preamp: -1.7dB
Filter 1: ON PK Fc 150 Hz Gain -2.0 dB Q 1.0
Filter 2: ON HSC Fc 4500 Hz Gain 2.0 dB Q 1.0
Filter 3: ON PK Fc 5677 Hz Gain -7.0 dB Q 4.0
Filter 4: ON PK Fc 8500 Hz Gain -10.0 dB Q 4.0
Filter 5: ON PK Fc 12700 Hz Gain -9.0 dB Q 2.0

Beyerdynamic T1 V2 (Poor, N/A)[370]US$1050
Preamp: -5.0 dB
Filter 1: ON PK Fc 70 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 2500 Hz Gain 5.0 dB Q 1.0
Filter 3: ON PK Fc 7900 Hz Gain -8.0 dB Q 4.0
Bose NC700 (Fine, N/A)[n/a]US$380
Preamp: -4.3 dB
Filter 1: ON LSC Fc 40 Hz Gain 4.0 dB Q 1.0
Filter 2: ON PK Fc 180 Hz Gain -2.0 dB Q 1.0
Filter 3: ON PK Fc 3200 Hz Gain 3.0 dB Q 1.0

Bose QuietComfort 35 II (Great, N/A)[135]US$300
Preamp: -3.4 dB
Filter 1: ON PK Fc 4000 Hz Gain 3.5 dB Q 2.0
Filter 2: ON PK Fc 6100 Hz Gain -2.0 dB Q 4.0
Bowers & Wilkins P5 (Fine, N/A)[69]US$300
Preamp: -8.0 dB
Filter 1: ON PK Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 4510 Hz Gain 4.0 dB Q 2.0
Filter 3: ON PK Fc 7600 Hz Gain 6.0 dB Q 2.0
Dan Clark Stealth (Great, N/A)[549]US$4000
No EQ needed.

Dan Clark Audio AEON RT (Great, N/A)[677]US$500
Preamp: -3.8 dB
Filter 1: ON LSC Fc 30 Hz Gain 3.5 dB Q 1.0
Filter 2: ON PK Fc 153 Hz Gain 3.0 dB Q 4.0
Filter 3: ON PK Fc 2884 Hz Gain 3.0 dB Q 2.0
Filter 4: ON HSC Fc 6000 Hz Gain -2.0 dB Q 1.0

Drop Ether CX (Great, N/A)[182]US$900
Preamp: -6.4 dB
Filter 1: ON LSC Fc 80 Hz Gain 6.0 dB Q 1.0
Filter 2: ON PK Fc 3000 Hz Gain 3.0 dB Q 3.0
Filter 3: ON PK Fc 5000 Hz Gain 3.0 dB Q 4.0

Dan Clark Expanse (Great, Great)[665]US$4000
- No EQ needed
E-MU Teak (Great, N/A)[97]US$500
Preamp: -5.4 dB
Filter 1: ON LSC Fc 30 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 3289 Hz Gain 2.5 dB Q 3.0
Filter 3: ON PK Fc 5464 Hz Gain -5.0 dB Q 5.0
Filter 4: ON PK Fc 10600 Hz Gain -6.0 dB Q 5.0
FiiO FD5 (IEM) (Great, Great)[30]US$500
Preamp: -2.8 dB
Filter 1: ON PK Fc 205 Hz Gain -4.0 dB Q 1.5
Filter 2: ON PK Fc 3700 Hz Gain 3.0 dB Q 4.0
Filter 3: ON PK Fc 5560 Hz Gain -3.0 dB Q 5.0
Massdrop X Focal ELEX (Fine, N/A)[180]US$700
Preamp: -7.5 db
Filter 1: ON LSC Fc 80 Hz Gain 7.0 dB Q 1.0
Filter 2: ON PK Fc 4700 Hz Gain 3.0 dB Q 3.0

Focal Celestee (Not terrible, N/A)[89]US$990
Preamp: -4.8 dB
Filter 1: ON PK Fc 800 Hz Gain -2.0 dB Q 1.0
Filter 2: ON PK Fc 1800 Hz Gain -3.0 dB Q 4.0
Filter 3: ON PK Fc 3800 Hz Gain 5.0 dB Q 2.5

Focal Clear (Not terrible, N/A)[n/a]US$1490
In the Focal Clear review, Amir incorrectly reported +2dB gain (for 11,319 Hz peaking filter) when he posted the PEQ filters photo.
But in the review, he said "lowering of the peak at 11.3 kHz". This means gain should be -2dB (not +2dB).
My code shows the correct value.
Preamp: -5.3 dB
Filter 1: ON LSC Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 2.0 dB Q 1.0
Filter 3: ON PK Fc 1100 Hz Gain -2.0 dB Q 2.0
Filter 4: ON PK Fc 11319 Hz Gain -2.0 dB Q 3.0

Focal Elegia (Fine, Not terrible)[82]US$543
Preamp: -6.2 dB
Filter 1: ON PK Fc 20 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 39 Hz Gain 1.5 dB Q 1.0
Filter 3: ON PK Fc 3277 Hz Gain 5.0 dB Q 2.5
Filter 4: ON PK Fc 7000 Hz Gain 6.0 dB Q 3.0

Focal Stellia (Fine, Not terrible)[96]US$2990
Preamp: -5.0 dB
Filter 1: ON PK Fc 60 Hz Gain 4.0 dB Q 4.0
Filter 2: ON PK Fc 110 Hz Gain -3.0 dB Q 3.0
Filter 3: ON PK Fc 1200 Hz Gain -2.0 dB Q 3.0
Filter 4: ON PK Fc 4200 Hz Gain 5.0 dB Q 6.0

Focal Utopia (Great, N/A)[149]US$4000
Preamp: -6.4 db
Filter 1: ON LSC Fc 50 Hz Gain 6.0 dB Q 1.0
Filter 2: ON PK Fc 2100 Hz Gain 4.0 dB Q 3.0
Filter 3: ON PK Fc 3500 Hz Gain 2.5 dB Q 4.0

Focal Clear Professional (Not terrible, Not terrible)[160]US$1500
Preamp: -7.0 dB
Filter 1: ON LSC Fc 41 Hz Gain 7.0 dB Q 0.68
Filter 2: ON PK Fc 1300 Hz Gain -2.0 dB Q 2.0
Filter 3: ON PK Fc 2300 Hz Gain 2.0 dB Q 3.0
Filter 4: ON PK Fc 5800 Hz Gain 4.0 dB Q 2.0
Filter 5: ON PK Fc 6600 Hz Gain -2.0 dB Q 5.0
Filter 6: ON PK Fc 11600 Hz Gain -4.0 dB Q 6.0
Custom Grado With Elleven Acoustica R1 Driver (Fine, N/A)[17]n/a
Preamp: -8.6 dB
Filter 1: ON LSC Fc 60 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 1991 Hz Gain -10.0 dB Q 4.0
Filter 3: ON PK Fc 4000 Hz Gain 9.0 dB Q 4.0
Filter 4: ON PK Fc 5000 Hz Gain -6.0 dB Q 5.0

Grado SR60x (Fine, Poor)[123]US$100
Preamp: -5.0 dB
Filter 1: ON PK Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 1950 Hz Gain -8.0 dB Q 4.0
Filter 3: ON PK Fc 4400 Hz Gain -8.0 dB Q 6.0
HEDD HEDDPhone (Not terrible, N/A)[583]US$1900
Preamp: -7.5 dB
Filter 1: ON LSC Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LSC Fc 50 Hz Gain 2.0 dB Q 1.0
Filter 3: ON PK Fc 264 Hz Gain -2.0 dB Q 3.0
Filter 4: ON PK Fc 710 Hz Gain -5.0 dB Q 3.5
Filter 5: ON PK Fc 1892 Hz Gain 2.0 dB Q 3.0
Hifiman Ananda (Not terrible, N/A)[93]US$700
Preamp: -7.4 db
Filter 1: ON LSC Fc 20 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 90 Hz Gain 1.5 dB Q 1.0
Filter 4: ON PK Fc 930 Hz Gain -2.0 dB Q 2.0
Filter 5: ON PK Fc 1850 Hz Gain 5.0 dB Q 2.5
Filter 6: ON PK Fc 8100 Hz Gain -4.0 dB Q 3.0
Filter 7: ON PK Fc 12000 Hz Gain -6.0 dB Q 3.0

Hifiman Arya (Great, Fine)[214]US$1230
Preamp: -5.0 dB
Filter 1: ON PK Fc 20 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 290 Hz Gain -2.0 dB Q 1.0
Filter 3: ON PK Fc 1630 Hz Gain 3.0 dB Q 3.0
Filter 4: ON PK Fc 4970 Hz Gain -4.0 dB Q 6.0
Filter 5: ON PK Fc 8000 Hz Gain -4.0 dB Q 7.0

Hifiman HE-6 (Great, Fine)[1250]US$1300
Preamp: -5.4 dB
Filter 1: ON LSC Fc 60 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 2000 Hz Gain 4.0 dB Q 1.5
Filter 3: ON PK Fc 4300 Hz Gain -3.0 dB Q 2.0
Filter 4: ON HSC Fc 10000 Hz Gain -3.0 dB Q 1.0

Hifiman HE6SE (Great, N/A)[328]US$1800
Preamp: -7.6 dB
Filter 1: ON LSC Fc 80 Hz Gain 7.0 dB Q 1.0
Filter 2: ON PK Fc 120 Hz Gain 1.0 dB Q 1.0
Filter 3: ON PK Fc 2000 Hz Gain 4.0 dB Q 1.5
Filter 4: ON PK Fc 4303 Hz Gain -3.0 dB Q 3.0
Filter 5: ON HSC Fc 10000 Hz Gain -3.0 dB Q 1.0
[/QUOTE]

Hifiman HE400i 2016 (Fine, N/A)[n/a]US$450
Preamp: -5.3 dB
Filter 1: ON LSC Fc 40 Hz Gain 3.5 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 1.5 dB Q 1.0
Filter 3: ON PK Fc 1900 Hz Gain 5.0 dB Q 2.5
Filter 4: ON PK Fc 5300 Hz Gain 3.0 dB Q 3.0
Filter 5: ON PK Fc 8300 Hz Gain -4.0 dB Q 4.0

Hifiman HE400i 2020 (Fine, N/A)[n/a]US$170
Preamp: -9.8 dB
Filter 1: ON LSC Fc 50 Hz Gain 6.4 dB Q 1.0
Filter 2: ON LSC Fc 99 Hz Gain 2.8 dB Q 1.0
Filter 3: ON PK Fc 1512 Hz Gain 1.0 dB Q 3.0
Filter 4: ON PK Fc 1908 Hz Gain 5.0 dB Q 2.5
Filter 5: ON PK Fc 5280 Hz Gain 3.0 dB Q 3.0
Filter 6: ON PK Fc 8496 Hz Gain -6.0 dB Q 5.0

Hifiman HE400SE (Great, Great)[328]US$150
Preamp: -6.7 dB
Filter 1: ON PK Fc 20 Hz Gain 6.0 dB Q 1.0
Filter 2: ON PK Fc 37 Hz Gain 1.8 dB Q 1.0
Filter 3: ON PK Fc 1950 Hz Gain 4.5 dB Q 3.0

Hifiman HE-560 V4 (Fine, Fine)[420]US$260
Preamp: -7.0 dB
Filter 1: ON PK Fc 20 Hz Gain 6.0 dB Q 1.0
Filter 2: ON PK Fc 37 Hz Gain 1.8 dB Q 1.0
Filter 3: ON PK Fc 1800 Hz Gain 7.0 dB Q 3.0
Filter 4: ON PK Fc 5870 Hz Gain -2.0 dB Q 5.0

Hifiman Sundara (Great, N/A)[318]US$350
Preamp: -8.6 dB
Filter 1: ON LSC Fc 50 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 2112 Hz Gain 2.5 dB Q 1.5
Filter 3: ON PK Fc 6300 Hz Gain -4.0 dB Q 4.0
JVC HA-SZ1000 (Poor, Poor)[n/a]US$400
Not given
Massdrop X KOSS ESP/95X Electrostatic (BETA review) (Not terrible, N/A)[n/a]US$500
Preamp: -3.7 dB
Filter 1: ON HP Fc 22 Hz
Filter 2: ON LSC Fc 60 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 1106 Hz Gain -3.0 dB Q 2.5
Filter 4: ON PK Fc 4300 Hz Gain 4.0 dB Q 3.0
Filter 5: ON PK Fc 5300 Hz Gain -2.0 dB Q 5.0

KOSS Porta Pro (Fine, Fine)[102]US$50
Preamp: -7.8 dB
Filter 1: ON PK Fc 21 Hz Gain 7.8 dB Q 1.0
Filter 2: ON PK Fc 38 Hz Gain 0.4 dB Q 3.0
Filter 3: ON PK Fc 180 Hz Gain -4.0 dB Q 2.5
Filter 4: ON PK Fc 3600 Hz Gain 6.0 dB Q 5.0
Filter 5: ON PK Fc 5253 Hz Gain -2.0 dB Q 7.0
Filter 6: ON PK Fc 7950 Hz Gain 7.0 dB Q 7.0

KOSS PRO 4AA (Poor, N/A)[162]n/a
Preamp: -11.1 dB
Filter 1: ON LSC Fc 61 Hz Gain 6.3 dB Q 1.0
Filter 2: ON LSC Fc 108 Hz Gain 4.2 dB Q 1.0
Filter 3: ON PK Fc 1000 Hz Gain 4.0 dB Q 2.0
Filter 4: ON PK Fc 2500 Hz Gain -3.0 dB Q 4.0
Filter 5: ON HSC Fc 3000 Hz Gain 6.0 dB Q 1.0
Kennerton Rognir (Fine, N/A)[143]US$3770
Preamp: -9.1 dB
Filter 1: ON PK Fc 20 Hz Gain 6.0 dB Q 0.5
Filter 2: ON PK Fc 239 Hz Gain 4.2 dB Q 3.0
Filter 3: ON PK Fc 884 Hz Gain -2.0 dB Q 5.0
Filter 4: ON PK Fc 4380 Hz Gain 9.0 dB Q 3.0
Filter 5: ON HSC Fc 12000 Hz Gain -2.0 dB Q 1.0
Mark Levinson No 5909 (Questionable, Fine)[180]US$1000
Preamp: 0 dB
Filter 1: ON PK Fc 7000 Hz Gain -3.5 dB Q 4.0
Massdrop x Meze 99 Noir (Fine, N/A)[47]US$200
Preamp: -6.0 dB
Filter 1: ON PK Fc 180 Hz Gain -10.0 dB Q 1.0
Filter 2: ON PK Fc 401 Hz Gain 4.0 dB Q 3.0
Filter 3: ON PK Fc 1200 Hz Gain 2.0 dB Q 1.0
Filter 4: ON PK Fc 2300 Hz Gain 4.0 dB Q 3.0
Filter 5: ON PK Fc 3808 Hz Gain 5.5 dB Q 4.0
Filter 6: ON PK Fc 8600 Hz Gain -5.0 dB Q 4.0

Meze Liric (Great, Not terrible)[204]US$2000
Preamp: -4.8 dB
Filter 1: ON PK Fc 105 Hz Gain -4.0 dB Q 2.0
Filter 2: ON PK Fc 1000 Hz Gain -4.0 dB Q 2.0
Filter 3: ON PK Fc 2721 Hz Gain 2.4 dB Q 2.0
Filter 4: ON PK Fc 3717 Hz Gain 4.0 dB Q 5.0
Filter 5: ON PK Fc 8550 Hz Gain -4.0 dB Q 7.0
Moondrop Blessing 2 (IEM) (Fine, Fine)[60]US$320
Preamp: -2.2 dB
Filter 1: ON LSC Fc 71 Hz Gain 2.1 dB Q 1.00
Filter 2: ON PK Fc 220 Hz Gain -1.8 dB Q 2.0
Filter 3: ON PK Fc 1290 Hz Gain -2.0 dB Q 2.0
Filter 4: ON PK Fc 5870 Hz Gain -3.0 dB Q 5.0
Filter 5: ON PK Fc 8670 Hz Gain 2.0 dB Q 5.0
NAD Viso HP50 (Fine, N/A)[55]US$250
Preamp: -10.5 dB
Filter 1: ON LSC Fc 35 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LSC Fc 80 Hz Gain 5.0 dB Q 1.0
Filter 3: ON PK Fc 2100 Hz Gain 2.5 dB Q 2.0
Filter 4: ON PK Fc 2811 Hz Gain 7.0 dB Q 2.0
Filter 5: ON PK Fc 12100 Hz Gain -5.0 dB Q 4.0
Nan-6 Planar (Great, Fine)[950]US$750
Preamp: -6.0 dB
Filter 1: ON PK Fc 23 Hz Gain 6.0 dB Q 1.0
Filter 2: ON PK Fc 2100 Hz Gain 4.0 dB Q 2.5
Filter 3: ON PK Fc 3050 Hz Gain -2.0 dB Q 5.0
Nectar Hive (Questionable, Not terrible)[n/a]US$600
Preamp: -4.9 dB
Filter 1: ON PK Fc 1400 Hz Gain 2.0 dB Q 6.0
Filter 2: ON PK Fc 2000 Hz Gain 5.0 dB Q 4.0
Filter 3: ON PK Fc 3088 Hz Gain -2.5 dB Q 4.0
Filter 4: ON PK Fc 4500 Hz Gain 3.0 dB Q 5.0
Filter 5: ON PK Fc 5800 Hz Gain -5.0 dB Q 5.0
Neumann NDH20 (Fine, N/A)[159]US$500
Preamp: -4.8 dB
Filter 1: ON PK Fc 140 Hz Gain -2.0 dB Q 2.0
Filter 2: ON PK Fc 2000 Hz Gain 5.0 dB Q 4.0
Filter 3: ON PK Fc 3400 Hz Gain -3.0 dB Q 4.0
Filter 4: ON PK Fc 8447 Hz Gain -4.0 dB Q 5.0
Oppo PM3 (Fine, N/A)[161]US$400
Preamp: -3.9 dB
Filter 1: ON PK Fc 100 Hz Gain -6.0 dB Q 2.0
Filter 2: ON PK Fc 132 Hz Gain -3.6 dB Q 1.0
Filter 3: ON PK Fc 3300 Hz Gain 4.0 dB Q 2.0
Filter 4: ON PK Fc 7240 Hz Gain -5.1 dB Q 4.0
PSB M4U 1 (Not terrible, N/A)[59]US$230
Preamp: -8.5 dB
Filter 1: ON LSC Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LSC Fc 80 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2100 Hz Gain 5.0 dB Q 2.0
Panasonic RP-TCM125-A (Fine, N/A)[35]US$20
Preamp: -11.7 dB
Filter 1: ON PK Fc 160 Hz Gain -3.4 dB Q 1.0
Filter 2: ON PK Fc 2500 Hz Gain 5.5 dB Q 0.5
Filter 3: ON PK Fc 4618 Hz Gain -3.0 dB Q 5.0
Filter 4: ON PK Fc 7500 Hz Gain 10.0 dB Q 4.0
Philips Fidelio X2HR (Not terrible, N/A)[148]US$145
In the Philips Fidelio X2HR review, Amir noted a channel imbalance.
He boosted the right channel by +1.0 dB to fix it.
To do this in Equalizer APO, we need to offset the preamp on left channel by 1.0dB.
So Preamp would be -4.2db for left channel, and Preamp would be -3.2db for right channel.
Preamp: -3.2 dB
Filter 1: ON LSC Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON PK Fc 277 Hz Gain -1.7 dB Q 4.0
Filter 3: ON PK Fc 1650 Hz Gain -2.0 dB Q 3.0
Filter 4: ON PK Fc 5191 Hz Gain -6.0 dB Q 6.0
Filter 5: ON PK Fc 8200 Hz Gain -2.4 dB Q 5.0
Filter 6: ON HSC Fc 12000 Hz Gain -3.0 dB Q 1.0
RAAL-requisite SR1a Ribbon (BETA review) (Not terrible, N/A)[n/a]US$3500
Preamp: -6.9 dB
Filter 1: ON HP Fc 22 Hz
Filter 2: ON LSC Fc 40 Hz Gain 4.0 dB Q 1.0
Filter 3: ON LSC Fc 80 Hz Gain 4.0 dB Q 1.0
Filter 4: ON PK Fc 2000 Hz Gain -3.0 dB Q 3.0
Filter 5: ON PK Fc 5600 Hz Gain -2.0 dB Q 5.0
Filter 6: ON PK Fc 7520 Hz Gain -2.5 dB Q 4.0
Massdrop Sennheiser HD58X JUBILEE (Fine, N/A)[166]US$170
Preamp: -8.5 dB
Filter 1: ON LSC Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2300 Hz Gain 2.5 dB Q 3.0
Filter 4: ON PK Fc 3478 Hz Gain 4.8 dB Q 3.0

Drop Sennheiser PC38X (Great, N/A)[149]US$170
Preamp: -7.4 dB
Filter 1: ON LSC Fc 35 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 65 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 675 Hz Gain -6.0 dB Q 6.0
Filter 4: ON PK Fc 1400 Hz Gain -2.5 dB Q 2.0
Filter 5: ON PK Fc 4200 Hz Gain 3.0 dB Q 4.0
Filter 6: ON PK Fc 6975 Hz Gain 3.0 dB Q 4.0

Sennheiser HD 598 SE (Fine, N/A)[97]US$250
Preamp: -7.1 dB
Filter 1: ON LSC Fc 50 Hz Gain 6.0 dB Q 1.0
Filter 2: ON PK Fc 200 Hz Gain -5.5 dB Q 2.0
Filter 3: ON PK Fc 630 Hz Gain 6.0 dB Q 4.0
Filter 4: ON PK Fc 1520 Hz Gain 7.0 dB Q 2.0

Sennheiser HD 820 (Fine, N/A)[256]US$2400
Preamp: -4.8 dB
Filter 1: ON PK Fc 67 Hz Gain 4.0 dB Q 4.0
Filter 2: ON PK Fc 139 Hz Gain -5.0 dB Q 3.0
Filter 3: ON PK Fc 300 Hz Gain 5.0 dB Q 2.0
Filter 4: ON HSC Fc 11000 Hz Gain -4.0 dB Q 1.0

Sennheiser HD560S (Fine, Great)[246]US$170
Preamp: -7.5 dB
Filter 1: ON PK Fc 20 Hz Gain 7.0 dB Q 1.0
Filter 2: ON PK Fc 40 Hz Gain 1.7 dB Q 1.0
Filter 3: ON PK Fc 2580 Hz Gain 2.0 dB Q 1.5
Filter 4: ON PK Fc 5710 Hz Gain -2.6 dB Q 6.0
Filter 5: ON PK Fc 8400 Hz Gain -4.0 dB Q 6.0

Sennheiser HD600 (Fine, N/A)[327]US$400
Same as HD650.
Amir wrote this:
"I only made a brief evaluation of the HD600 with and without equalization I made for HD650. I could not tell a difference between the two in the confines of slow switching time between the two headphones. As with HD650, I was yet again impressed by how good this headphone sounds. Equalization made an improvement but the headphone was very listenable without it."

Sennheiser HD650 (Fine, N/A)[288]US$400
Preamp: -8.5 dB
Filter 1: ON LSC Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 7600 Hz Gain 4.0 dB Q 3.0
Filter 4: ON PK Fc 13700 Hz Gain -3.5 dB Q 4.0

Sennheiser HD660S (Fine, Fine)[176]US$400
Preamp: -12.0 dB
Filter 1: ON PK Fc 22 Hz Gain 12.0 dB Q 1.0
Filter 2: ON PK Fc 3000 Hz Gain 3.0 dB Q 2.5
Filter 3: ON PK Fc 5480 Hz Gain -3.0 dB Q 5.0

Sennheiser HD800S (Fine, N/A)[n/a]US$1700
Preamp: -11.7 dB
Filter 1: ON LSC Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LSC Fc 75 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2705 Hz Gain 3.0 dB Q 1.0
Filter 4: ON PK Fc 5400 Hz Gain -3.0 dB Q 3.0
Filter 5: ON HSC Fc 10000 Hz Gain -2.0 dB Q 1.0
Sivga Phoenix (Not terrible, N/A)[43]US$300
Preamp: -5.4 dB
Filter 1: ON LSC Fc 45 Hz Gain 2.0 dB Q 1.0
Filter 2: ON LSC Fc 90 Hz Gain 2.0 dB Q 1.0
Filter 3: ON PK Fc 1100 Hz Gain 3.0 dB Q 1.0
Filter 4: ON PK Fc 3100 Hz Gain 5.0 dB Q 4.0
Sony MDR-7506 (Not terrible, N/A)[101]US$130
Preamp: 0 dB
Filter 1: ON HP Fc 20 Hz
Filter 2: ON PK Fc 3000 Hz Gain -2.0 dB Q 3.0
Filter 3: ON PK Fc 4400 Hz Gain -4.0 dB Q 3.0

Sony MDR-ZX110 (Fine, N/A)[105]US$35
Preamp: -8.6 dB
Filter 1: ON LSC Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON PK Fc 1000 Hz Gain 5.0 dB Q 3.0
Filter 3: ON PK Fc 2500 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 5900 Hz Gain 7.0 dB Q 2.0

Sony WH-1000XM4 (Fine, N/A)[74]US$
Preamp: -3.0 dB
Filter 1: ON PK Fc 170 Hz Gain -3.0 dB Q 1.0
Filter 2: ON PK Fc 803 Hz Gain -3.8 dB Q 3.0
Filter 3: ON PK Fc 2200 Hz Gain 3.0 dB Q 2.0
Filter 4: ON HSC Fc 5300 Hz Gain -2.0 dB Q 1.0
Status Flagship ANC (Fine, N/A)[72]US$280
Preamp: -4.0 dB
Filter 1: ON PK Fc 2374 Hz Gain 4.0 dB Q 2.0
Superlux HD668B (Fine, N/A)[129]US$40
In the Superlux HD668B review, Amir noted a channel imbalance.
He boosted the right channel by +2.5 dB to fix it.
To do this in Equalizer APO, we need to offset the preamp on left channel by 2.5dB.
So preamp for left channel would be -11.0db, and -8.5db for right channel.
If you want to try this PEQ profile, use this code instead:
Preamp: -8.5 dB
Filter 1: ON LSC Fc 30 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LSC Fc 50 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 4000 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 5380 Hz Gain -7.0 dB Q 6.0
Filter 5: ON PK Fc 8582 Hz Gain -7.0 dB Q 5.0

Superlux HD387 (Fine, Not terrible)[30]US$15
Preamp: -7.0 dB
Filter 1: ON PK Fc 30 Hz Gain 7.0 dB Q 0.7
Filter 2: ON PK Fc 200 Hz Gain -2.5 dB Q 2.0
Filter 3: ON PK Fc 1808 Hz Gain 3.0 dB Q 0.3
Drop THX Panda (Poor, N/A)[68]US$400
Preamp: -6.2 dB
Filter 1: ON LSC Fc 55 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 1100 Hz Gain 5.0 dB Q 1.0
Filter 3: ON PK Fc 2500 Hz Gain 5.0 dB Q 1.0
TRUTHEAR x Crinacle Zero IEM (Great, Great)[74]US$50
- No EQ needed
Takstar Pro 82 (Not terrible, N/A)[108]US$80
Preamp: -4.9 dB
Filter 1: ON PK Fc 144 Hz Gain -6.0 dB Q 2.0
Filter 2: ON PK Fc 400 Hz Gain 5.0 dB Q 3.0
Filter 3: ON PK Fc 4500 Hz Gain 5.0 dB Q 2.5
Filter 4: ON PK Fc 8618 Hz Gain -6.0 dB Q 5.0
Filter 5: ON PK Fc 13500 Hz Gain -7.0 dB Q 4.0
Tascam TH-07 (Poor, N/A)[113]US$75
Preamp: -2.4 dB
Filter 1: ON PK Fc 180 Hz Gain -6.0 dB Q 2.0
Filter 2: ON PK Fc 1401 Hz Gain 2.5 dB Q 1.0
Filter 3: ON PK Fc 5172 Hz Gain -5.0 dB Q 2.5
Filter 4: ON PK Fc 13700 Hz Gain -5.0 dB Q 4.0
Verisonix Pro DJ (Poor, N/A)[66]US$120
Preamp: -10.3 dB
Filter 1: ON LSC Fc 60 Hz Gain 4.0 dB Q 1.0
Filter 2: ON PK Fc 170 Hz Gain -4.0 dB Q 2.0
Filter 3: ON PK Fc 333 Hz Gain 2.5 dB Q 2.0
Filter 4: ON PK Fc 1000 Hz Gain -5.0 dB Q 2.0
Filter 5: ON PK Fc 2400 Hz Gain 8.0 dB Q 4.0
Filter 6: ON PK Fc 4000 Hz Gain 10.0 dB Q 5.0
Verum Audio Verum 1 (Great, Fine)[54]US$350
Preamp: -8.2 dB
Filter 1: ON LSC Fc 74 Hz Gain 6.1 dB Q 0.68
Filter 2: ON PK Fc 2000 Hz Gain 8.0 dB Q 3.0
Filter 3: ON PK Fc 4000 Hz Gain 3.0 dB Q 3.0
Filter 4: ON PK Fc 6700 Hz Gain 5.0 dB Q 5.0
Yamaha RH-5Ma (Fine, N/A)[96]US$160
Preamp: -5.4 dB
Filter 1: ON LSC Fc 52 Hz Gain 5.0 dB Q 1.0
Filter 2: ON PK Fc 4924 Hz Gain -6.0 dB Q 5.0
Filter 3: ON PK Fc 8181 Hz Gain -6.0 dB Q 3.0
Filter 4: ON PK Fc 12400 Hz Gain -8.0 dB Q 4.0
ZMF Atticus (Fine, N/A)[239]US$1100
Preamp: -4.4 dB
Filter 1: ON LSC Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON PK Fc 148 Hz Gain -7.0 dB Q 1.5
Filter 3: ON PK Fc 2605 Hz Gain 3.0 dB Q 1.5
Filter 4: ON PK Fc 4300 Hz Gain 4.0 dB Q 5.0
Filter 5: ON PK Fc 5600 Hz Gain -4.0 dB Q 5.0
_________________________________________________
Changelog:
Legend: TVC = Thread View Count.
2020-12-19: Focal Clear, Hifiman HE400i 2016, Sennheiser HD800S
2020-12-25: Sennheiser HD650.
2020-12-31: HEDD HEDDPhone. TVC: 1,910
2021-01-04: Sony MDR-7506. TVC: 2,540 (+32%)
2021-01-05: NAD Viso HP50. TVC: 2,670 (+5%)
2021-01-07: Superlux HD668B. TVC: 3,080 (+15%)
2021-01-09: Philips Fidelio X2HR. TVC: 3,580 (+16%)
2021-01-10: Abyss Diana V2. TVC: 3,960 (+18%)
2021-01-13: +3 previously-excluded reviews (Audeze LCD-X, RAAL-requisite SR1a Ribbon, Massdrop X KOSS ESP/95X Electrostatic). TVC: 4,720 (+19%)
2021-01-14: Dan Clark Audio AEON RT. TVC: 5,000 (+6%)
2021-01-18: Sony MDR-ZX110. TVC: 5,830 (+17%)
2021-01-22: AKG K371. TVC: 7,380 (+27%)
2021-01-26: Sony WH-1000XM4. TVC: 8,570 (+16%)
2021-01-31: Beyerdynamic DT990 Pro. TVC: 9,380 (+9%)
2021-02-07: Beyerdynamic T1 V2. TVC: 10,980 (+17%)
2021-02-12: Bowers & Wilkins P5. TVC: 11,930 (+9%)
2021-02-20: Bose QuietComfort 35 II. TVC: 13,830 (+16%)
2021-03-01: Audio Technica ATH-M50X. TVC: 15,840 (+15%)
2021-03-04: Added "How to use 2 DACs on 1 Windows 10 PC, with separate PEQ profiles"
2021-03-07: Added "What happens if I install 'Equalizer APO' and setup everything up correctly, but it still doesn't work?"
2021-03-15: PSB M4U 1. TVC: 18,690 (+18%)
2021-03-22: Hifiman HE-6. TVC: 20,000 (+7%)
2021-03-29: Focal Celestee. TVC: 21,250 (+6%)
2021-04-03: Focal Utopia. TVC: 22,100 (+4%)
2021-04-08: Hifiman Ananda. TVC: 22,860 (+3%)
2021-04-09: Massdrop X Focal ELEX. TVC: 23,130 (+1%)
2021-04-15: Hifiman Sundara. TVC: 24,290 (+5%)
2021-04-22: Sennheiser HD 820. TVC: 26,070 (+7%)
2021-04-24: Panasonic RP-TCM125-A. TVC: 26,440 (+1%)
2021-04-27: Sivga Phoenix.
2021-05-05: Massdrop x Meze 99 Noir. TVC: 28,740 (+8%)
2021-05-06: Tascam TH-07 TVC: 29,150 (+1%)
2021-05-10: Drop THX Panda. TVC: 30,000 (+2%)
2021-05-15: Abyss AB-1266 Phi TC. TVC: 31,240 (+4%)
2021-05-20: Hifiman HE6se. TVC: 32,960 (+5%)
2021-05-23: Abyss Diana V2 (2nd review). TVC: 33,130 (+0.5%)
2021-06-05: Audeze LCD-24. TVC: 35,870 (+8%)
2021-06-08: Audio Technica ATH-ADX5000. TVC: 36,690 (+2%)
2021-06-14: AKG K240 55 Ohm and ZMF Atticus. TVC: 37,400 (+2%)
2021-06-23: Drop Sennheiser PC38X. TVC: 39,020 (+4%)
2021-06-28: Sennheiser HD 598 SE. TVC: 40,200 (+3%)
2021-07-01: Bose NC700 and Drop Ether CX. TVC: 40,840 (+1%)
2021-07-02: Beyerdynamic DT 880 600 Ohm. TVC: 41,070 (+0.5%)
2021-07-06: Drop AKG K7XX, AKG K271, Yamaha RH-5Ma. TVC: 42,040 (+2%)
2021-07-11: E-MU Teak, Takstar Pro 82. TVC: 43,000 (+2%)
2021-07-17: Custom Grado With Elleven Acoustica R1 Driver and Verisonix Pro DJ. TVC: 44,500 (+3%)
2021-07-26: Audeze LCD-X Review (2021 Edition) and Status Flagship
2021-08-01: Audeze LCD-1 and Oppo PM3
2021-08-02: MASSDROP Sennheiser HD58X JUBILEE. TVC: 48,060 (+8%)
2021-08-07: Apple AirPods Max. TVC: 48,970 (+2%)
2021-08-16: Hifiman HE400i 2020. TVC: 51,030 (+4%)
2021-09-06: Audeze Mobius.
2021-09-28: KOSS PRO 4AA. TVC: 59k (+15%)
2021-10-11: Neumann NDH20. TVC: 61k (+3%)
2021-10-17: Kennerton Rognir, Audeze SINE. TVC: 61k (+0%)
2021-10-31: Beyerdynamic Amiron Home.
2021-11-04: Hifiman Arya.
2021-11-10: Focal Elegia
2021-11-16: Focal Stellia
2021-11-20: AKG K712 Pro and Grado SR60x
2021-12-05: Hifiman HE400SE
2021-12-11: Hifiman HE-560 V4
2021-12-18: KOSS Porta Pro
2021-12-28: Meze Liric
2022-01-05: Sennheiser HD560S
2022-02-02: AKG K271 MK II Chinese
2022-02-13: AKG 701
2022-02-21: Audeze LCD-XC
2022-02-27: Beyerdynamic DT150
2022-04-03: Verum Audio Verum 1, Audio-Technica ATH-R70x, 64 Audio U12t (IEM), FiiO FD5 (IEM)
2022-04-08: Moondrop Blessing 2
2022-08-17: Back to editing this.
- Reorganized sections into spoilers.
- Headphones have been re-organized from A-Z, and now grouped by manufacturer (which will combine items like Drop's Sehhneiser with Sennheiser).
- Added Amir's 4 panther ratings ("poor", "not terrible", "fine", "great"), plus "questionable" (panther with hands covering his mouth).
- Added legend about Amir's panther ratings in "Readme" spoiler
- Added 6 reviews (Mark Levinson No 5909, Nectar Hive, Sennheiser HD660S, Nan-6 Planar, Superlux HD387, JVC HA-SZ1000).
- Fixed incorrect code, from "LS" to "LSC" (for low shelf filter) and from "HS" to "HSC" (for high shelf filter). For the most part, pre-amp values remained unchanged after this.
- Added Dan Clark Stealth. Amir didn't include a PEQ profile, so I missed it originally.
- Showing Amir's Panther award first, then community-voted panther second. Example: (Fine, Great)
- Added Sensitivity and the end of each headphone. Example: [Sensitivity]
- Added prices in USD (Don't particularly care about keeping this up to date with every sale, so this is just MSRP)
2022-08-31: Added Focal Clear Professional
2022-09-15: Added Dan Clark Expanse, TRUTHEAR x Crinacle Zero IEM
 
Last edited:

brachypelma44

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Thank you, this is helpful.

I just got the HD 6XX for my office, so I can EQ that set with PEACE (assuming it's the same as HD 650.)
 
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sweetchaos

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Improvements added:
How to compare your headphones out-of-the-box (without EQ) with Amir's PEQ filters?
1. Using your favorite EQ app, create a new configuration by importing Amir's PEQ (as shown above), save it.
2. Create a 2nd configuration, but this time leave the filters at default. In other words, make a flat EQ profile. Then, enter the same preamp gain from step #1 (from Amir's PEQ profile), save it.
3. This will make 2 configurations level matched, so now you can A/B test *instantly* between the two configurations to see how much of a difference there is.
 
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sweetchaos

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1. Changed From:
How to calculate the preamp gain needed for Amir's posted PEQ filters?

To:
***OPTIONAL*** How to calculate the preamp gain needed for Amir's posted PEQ filters?
You do not need to perform these steps, as I've done it for you.
This is simply for educational purposes, so you understand where preamp gain comes from.


2. Added the Focal Clear Discrepancy Disclaimer.
In the Focal Clear review, Amir incorrectly reported +2dB gain (for 11,319 Hz peaking filter) when he posted the PEQ filters photo.
But in the review, he said "lowering of the peak at 11.3 kHz". This means gain should be -2dB (not +2dB).
My code shows the correct value.
 
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sweetchaos

sweetchaos

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[For Advanced Users] How to compare multiple PEQ profiles with each other?
1. Let's say you found 3 PEQ profiles online (Amir's and a few others...) for your headphones
2. Import all PEQ profiles into your EQ software
PEQ profile #1:
Preamp: -3.8 dB
Filter 1: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 2: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 3: ON PK Fc xx Hz Gain x.x dB Q x.x
PEQ profile #2:
Preamp: -5.4 dB
Filter 1: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 2: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 3: ON PK Fc xx Hz Gain x.x dB Q x.x
PEQ profile #3:
Preamp: -4.3 dB
Filter 1: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 2: ON PK Fc xx Hz Gain x.x dB Q x.x
Filter 3: ON PK Fc xx Hz Gain x.x dB Q x.x
2. To properly compare all PEQ profiles, you'll need to have them level-matched.
To do this, you'll need to set each PEQ profile to have the same preamp, which should be the highest negative preamp gain.
In the example above, a preamp gain of -5.4 dB will need to be manually overridden for PEQ#1 and PEQ#3 profiles.
Save both profiles.
3. Now you can instantly switch between the profiles, to see how the sound changes.
4. After you've found the best sounding PEQ profile, you'll need to revert the preamp gain back to the original.
 

Nango

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Are these figures always transferable and applicable to any other PEQ software (like NeutronMP) and the results will be the same?
 
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sweetchaos

sweetchaos

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Improvements Added:

[For Advanced Users] What do I do when I have channel-imbalanced headphones?
Some headphones have channel imbalances, where one channel (ex. right) plays at a lower volume than the other channel (ex. left).
Amir makes a note of these channel imbalances in the headphone reviews.
How do you tell if your headphones are channel imbalanced?
Play pink noise for each channel and watch for volume differences, to see if you need to boost the preamp gain on one channel.

Superlux HD668B channel imbalance:
In the Superlux HD668B review, Amir noted a channel imbalance.
He boosted the right channel by +2.5 dB to fix it.
To do this in Equalizer APO, we need to offset the preamp on left channel by 2.5dB.
If you want to try this PEQ profile, use this code instead:

Channel: L
Preamp: -11.0 dB
Filter 1: ON LS Fc 30 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LS Fc 50 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 4000 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 5380 Hz Gain -7.0 dB Q 6.0
Filter 5: ON PK Fc 8582 Hz Gain -7.0 dB Q 5.0

Channel: R
Preamp: -8.5 dB
Filter 1: ON LS Fc 30 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LS Fc 50 Hz Gain 4.0 dB Q 1.0
Filter 3: ON PK Fc 4000 Hz Gain 5.0 dB Q 2.0
Filter 4: ON PK Fc 5380 Hz Gain -7.0 dB Q 6.0
Filter 5: ON PK Fc 8582 Hz Gain -7.0 dB Q 5.0


Philips Fidelio X2HR channel imbalance:
In the Philips Fidelio X2HR review, Amir noted a channel imbalance.
He boosted the right channel by +1.0 dB to fix it.
To do this in Equalizer APO, we need to offset the preamp on left channel by 1.0dB.
If you want to try this PEQ profile, use this code instead:

Channel: L
Preamp: -4.2 dB
Filter 1: ON LS Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON PK Fc 277 Hz Gain -1.7 dB Q 4.0
Filter 3: ON PK Fc 1650 Hz Gain -2.0 dB Q 3.0
Filter 4: ON PK Fc 5191 Hz Gain -6.0 dB Q 6.0
Filter 5: ON PK Fc 8200 Hz Gain -2.4 dB Q 5.0
Filter 6: ON HS Fc 12000 Hz Gain -3.0 dB Q 1.0

Channel: R
Preamp: -3.2 dB
Filter 1: ON LS Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON PK Fc 277 Hz Gain -1.7 dB Q 4.0
Filter 3: ON PK Fc 1650 Hz Gain -2.0 dB Q 3.0
Filter 4: ON PK Fc 5191 Hz Gain -6.0 dB Q 6.0
Filter 5: ON PK Fc 8200 Hz Gain -2.4 dB Q 5.0
Filter 6: ON HS Fc 12000 Hz Gain -3.0 dB Q 1.0
 
Last edited:

thomz6

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stupid question but why his HD 800s EQ is so different than that oratory1990 ?
 
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