How does my subwoofer REW graph look?

[bhayes9614]

Hey, so I just started to get into REW and went out today and purchased a microphone! I have a pretty small room under 1200 cubic feet and includes 8 DIY acoustic panels. Made sure to calibrate the interface first then imported the calibration file for my microphone and positioned it where my head would be at 90 degrees. Var smoothing is applied for the graphs if that is cool

Equipment:
Dayton Audio Audio EMM-6 Microphone
Komplete Audio 6 Interface
SVS SB 1000 Pro
Crossover is 100hz
Kef Q150 Speakers (turned off while measuring my sub)


For this test my reference volume is set to 75db and speakers are turned off so I can test the subwoofer with a 10-200hz sweep. Let me know what you think! The red line is before EQ and Green is after EQ in the SVS app. 80db was the highest I let the line go. At 25hz I brought it down a bit, 76hz down a bit, and then 89hz I tried to boost it up. It made little difference because I assume this is just a problem in the room. also is it normal for the 100-200hz range to just gradually fall down like that? Lastly the dip at 57hz is a room issue as well so I left it alone.

Photos:

 

[Joffy1780]

Have you ran a sweep with the q150s running as well? Just the dip you're boosting at 89hz may be due to the crossover roll off.

 

[bhayes9614]

Have you ran a sweep with the q150s running as well? Just the dip you're boosting at 89hz may be due to the crossover roll off.

Ah I see, I will try it again tonight with the speakers included as well!

 

[staticV3]

Please use a vertical range of ~50dB for your graphs.
It's currently set to ~170dB (-38dB to 132dB), which is way too much.

 

[Ron Texas]

Ah I see, I will try it again tonight with the speakers included as well!

You are extremely fortunate to have such a nearly flat response. Stop worrying, you could get by with no EQ at all.

 

[staticV3]

You are extremely fortunate to have such a nearly flat response.

It's not that flat actually. Just massively compressed due to to the 170dB vertical scale.

 

[sam_adams]

As @staticV3 said, use a 50dB vertical range and don't smooth the measurements.

 

[Ron Texas]

It's not that flat actually. Just massively compressed due to to the 170dB vertical scale.

I understand the scale makes it look better than it really is, but it is definitely better than what I have.

 

[bhayes9614]

Please use a vertical range of ~50dB for your graphs.
It's currently set to ~170dB (-38dB to 132dB), which is way too much.

These were my settings when I ran the test. So I should have top set to 50?

 

[staticV3]

These were my settings when I ran the test. View attachment 316669

Since the graph in your first post goes from -38dB at the bottom to 132dB at the top, and from 10Hz to 200Hz, you may have forgot to click 'Apply Settings' before you took the screenshot.

So I should have top set to 50?

If you set top to 50 and leave bottom where it is, then your graph will not show anything as 50dB will be both the highest and lowest value displayed.

 

[bhayes9614]

Since the graph in your first post goes from -38dB at the bottom to 132dB at the top, and from 10Hz to 200Hz, you may have forgot to click 'Apply Settings' before you took the screenshot.


If you set top to 50 and leave bottom where it is, then your graph will not show anything as 50dB will be both the highest and lowest value displayed.

Oh I see what you mean now! Lol that's my fault then for zooming all over the place before I decided to take a screenshot. I will try some more now thanks! but just in case you are curious here is my first raw test no EQ and no smoothing from the other night

 

[radix]

Have you tried moving the sub around to see if you can do anything with those 57 Hz and 90 Hz dips? As I think someone mentioned, the speakers might mask over the 90 Hz dip (maybe change the crossover freq, but test it out with the mic).

 

[bhayes9614]

So my Kef Q150 speakers are acting a lot differently than I expected! But I forgot to mention I also am using a vintage Marantz 2230 stereo with Bass, Mid, Treble all set to flat. This graph shows a speaker only test and they are pumping too many decibels after 110hz. I wonder if I should try using the foam plugs that came with them

Here is my sub and speakers together with EQ right now

Edit: Sorry hope my thread doesn't look all disorganized! But I think the foam plugs aren't what I need actually. Correct me if I'm wrong but I think I need to pull the speakers out from the wall a hair.

 

[bhayes9614]

Have you tried moving the sub around to see if you can do anything with those 57 Hz and 90 Hz dips? As I think someone mentioned, the speakers might mask over the 90 Hz dip (maybe change the crossover freq, but test it out with the mic).

I may have to try that I originally did the sub crawl when I first got my sub but wouldn't hurt to experiment more now that I got the proper microphone, thanks

 

[radix]

So my Kef Q150 speakers are acting a lot differently than I expected! But I forgot to mention I also am using a vintage Marantz 2230 stereo with Bass, Mid, Treble all set to flat. This graph shows a speaker only test and they are pumping too many decibels after 110hz. I wonder if I should try using the foam plugs that came with them

View attachment 316683

Here is my sub and speakers together with EQ right now

View attachment 316685

I think it looks a lot better with speakers + subs. As long as the speakers are not distorting from the bass, it's OK to keep it.

Did you use the 90* calibration file with the mic pointed up? I've not used the Dayton, so maybe that's just a UMIK thing.

Generally, one wants a slightly downward slope from from bass to treble, so maybe add a bit more sub? Unless you are trying to get flat for recording.

 

[staticV3]

So my Kef Q150 speakers are acting a lot differently than I expected! This graph shows a speaker only test and they are pumping too many decibels after 110hz. I wonder if I should try using the foam plugs that came with them

That matches up pretty well with the Estimated In-room Response from Erin's Audio Corner:



Ideally, you'd have a way to high-pass the output to your Q150. If not then you should set your SB-1000 Pro's Low Pass Filter to somewhere around 50Hz to match the KEFs.

 

[bhayes9614]

I think it looks a lot better with speakers + subs. As long as the speakers are not distorting from the bass, it's OK to keep it.

Did you use the 90* calibration file with the mic pointed up? I've not used the Dayton, so maybe that's just a UMIK thing.

Generally, one wants a slightly downward slope from from bass to treble, so maybe add a bit more sub? Unless you are trying to get flat for recording.

Trying to confirm that now they give you a file but it doesn't really specify if it supports 0, 45 and 90 degree's

 

[bhayes9614]

Appreciate all of the help, I am pretty satisfied for now! Here are my final results this evening after adjusting my EQ and volume again in the SVS app.


Subwoofer only:

Subwoofer + Speakers:

SVS App:

PEQ1: 25HZ, -6, 3
PEQ2: 77HZ, -4, 6
PEQ3: 89HZ, 6, 8

 

[radix]

It looks like the dips are worse with sub + speaker. Maybe try tweaking the phase or just 180* invert the sub. You should be able to reduce dips with multiple speakers rather than making them worse.

 

[bhayes9614]

It looks like the dips are worse with sub + speaker. Maybe try tweaking the phase or just 180* invert the sub. You should be able to reduce dips with multiple speakers rather than making them worse.

That is odd glad you pointed that out! Right now I do have the Phase set to 180 because it sounds boomy at 0. But when I get home I will try some more tests.