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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 LS Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LS 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 HS 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 color.
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 LS Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LS 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 HS 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 LS Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LS 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 HS 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
HS => High Shelf
LS => 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 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

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.

_________________________________________________
List of Amir's headphone PEQ filters (sorted A-Z):

Abyss AB-1266 Phi TC:
Preamp: -4.9 dB
Filter 1: ON LS 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:
Preamp: -8.6 dB
Filter 1: ON LS 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):
Preamp: -6.3 dB
Filter 1: ON LS Fc 42 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LS 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

AKG K240 55 Ohm:
Preamp: -11.7 dB
Filter 1: ON LS Fc 40 Hz Gain 7.0 dB Q 1.0
Filter 2: ON LS 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:
Preamp: -8.6 dB
Filter 1: ON LS 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 K371:
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

Apple AirPods Max:
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:
Preamp: -8.7 dB
Filter 1: ON LS 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:
Preamp: -8.4 dB
Filter 1: ON LS Fc 40 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LS 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)
Preamp: -8.0 dB
Filter 1: ON HP Fc 22 Hz
Filter 2: ON LS Fc 35 Hz Gain 4.0 dB Q 1.0
Filter 3: ON LS 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 Review (2021 Edition):
Preamp: -11.2 dB
Filter 1: ON LS Fc 31 Hz Gain 6.7 dB Q 1.0
Filter 2: ON LS 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 Mobius:
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

Audio Technica ATH-ADX5000:
Preamp: -7.5 dB
Filter 1: ON LS 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:
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

Beyerdynamic DT 880 600 Ohm:
Preamp: -4.3 dB
Filter 1: ON LS 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:
Preamp: -2.0 dB
Filter 1: ON PK Fc 150 Hz Gain -2.0 dB Q 1.0
Filter 2: ON HS 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:
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:
Preamp: -3.9 dB
Filter 1: ON LS 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:
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:
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

Custom Grado With Elleven Acoustica R1 Driver:
Preamp: -8.6 dB
Filter 1: ON LS 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

Dan Clark Audio AEON RT:
Preamp: -3.8 dB
Filter 1: ON LS 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 HS Fc 6000 Hz Gain -2.0 dB Q 1.0

Drop AKG K7XX:
Preamp: -5.7 dB
Filter 1: ON LS 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

Drop Ether CX:
Preamp: -6.4 dB
Filter 1: ON LS 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

Drop Sennheiser PC38X:
Preamp: -7.4 dB
Filter 1: ON LS Fc 35 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LS 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

Drop THX Panda:
Preamp: -6.2 dB
Filter 1: ON LS 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

E-MU Teak:
Preamp: -5.4 dB
Filter 1: ON LS 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

Focal Celestee:
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:
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 LS Fc 40 Hz Gain 3.0 dB Q 1.0
Filter 2: ON LS 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 Utopia:
Preamp: -6.4 db
Filter 1: ON LS 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

HEDD HEDDPhone:
Preamp: -7.5 dB
Filter 1: ON LS Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LS 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:
Preamp: -7.4 db
Filter 1: ON LS Fc 20 Hz Gain 4.0 dB Q 1.0
Filter 2: ON LS 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 HE-6:
Preamp: -5.4 dB
Filter 1: ON LS 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 HS Fc 10000 Hz Gain -3.0 dB Q 1.0

Hifiman HE6se:
Preamp: -7.7 dB
Filter 1: ON LS 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 HS Fc 10000 Hz Gain -3.0 dB Q 1.0

Hifiman HE400i 2016:
Preamp: -5.3 dB
Filter 1: ON LS Fc 40 Hz Gain 3.5 dB Q 1.0
Filter 2: ON LS 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:
Preamp: -9.8 dB
Filter 1: ON LS Fc 50 Hz Gain 6.4 dB Q 1.0
Filter 2: ON LS 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 Sundara:
Preamp: -8.6 dB
Filter 1: ON LS 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

KOSS PRO 4AA:
Preamp: -11.1 dB
Filter 1: ON LS Fc 61 Hz Gain 6.3 dB Q 1.0
Filter 2: ON LS 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 HS Fc 3000 Hz Gain 6.0 dB Q 1.0

Massdrop Sennheiser HD58X JUBILEE:
Preamp: -8.5 dB
Filter 1: ON LS Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LS 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

Massdrop X Focal ELEX:
Preamp: -7.5 db
Filter 1: ON LS Fc 80 Hz Gain 7.0 dB Q 1.0
Filter 2: ON PK Fc 4700 Hz Gain 3.0 dB Q 3.0

Massdrop X KOSS ESP/95X Electrostatic: (BETA review)
Preamp: -3.8 dB
Filter 1: ON HP Fc 22 Hz
Filter 2: ON LS 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

Massdrop x Meze 99 Noir:
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

NAD Viso HP50:
Preamp: -10.5 dB
Filter 1: ON LS Fc 35 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LS 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

Neumann NDH20:
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:
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

Panasonic RP-TCM125-A:
Preamp: -11.6 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:
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
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

PSB M4U 1:
Preamp: -8.5 dB
Filter 1: ON LS Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LS Fc 80 Hz Gain 3.0 dB Q 1.0
Filter 3: ON PK Fc 2100 Hz Gain 5.0 dB Q 2.0

RAAL-requisite SR1a Ribbon: (BETA review)
Preamp: -7.1 dB
Filter 1: ON HP Fc 22 Hz
Filter 2: ON LS Fc 40 Hz Gain 4.0 dB Q 1.0
Filter 3: ON LS 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

Sennheiser HD 598 SE:
Preamp: -7.1 dB
Filter 1: ON LS 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:
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 HS Fc 11000 Hz Gain -4.0 dB Q 1.0

Sennheiser HD650:
Preamp: -8.5 dB
Filter 1: ON LS Fc 40 Hz Gain 5.0 dB Q 1.0
Filter 2: ON LS 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 HD800S:
Preamp: -11.7 dB
Filter 1: ON LS Fc 40 Hz Gain 8.0 dB Q 1.0
Filter 2: ON LS 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 HS Fc 10000 Hz Gain -2.0 dB Q 1.0

Sivga Phoenix:
Preamp: -5.4 dB
Filter 1: ON LS Fc 45 Hz Gain 2.0 dB Q 1.0
Filter 2: ON LS 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:
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:
Preamp: -8.6 dB
Filter 1: ON LS 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:
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 HS Fc 5300 Hz Gain -2.0 dB Q 1.0

Status Flagship ANC:
Preamp: -4.0 dB
Filter 1: ON PK Fc 2374 Hz Gain 4.0 dB Q 2.0

Superlux HD668B:
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
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

Takstar Pro 82:
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:
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:
Preamp: -10.4 dB
Filter 1: ON LS 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

Yamaha RH-5Ma:
Preamp: -5.4 dB
Filter 1: ON LS 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:
Preamp: -4.4 dB
Filter 1: ON LS 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%)
 
Last edited:
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sweetchaos

sweetchaos

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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.)
 
Last edited:
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sweetchaos

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

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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Improvements Added:

[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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