Results of some minor sub tweaks

[Pandaman617]

I recently altered my room a bit so I could make my 4 subs as symmetrical as possible and have my LRC all at ear level in regards to the tweeters. Speaker wise I was very pleased but as you can see from my first 3 point REW sub measurement performance left much to be desired. This morning I used super position and ensured all 4 subs are outputting around 72-73dB for a sum of 80dB total output and with some minor placement tweaks made significant improvements both in terms of measurements and audible performance The 4 subs are

1) Mirage BPS-400 dual 12” sealed
2) Atlantic Technology 372 THX 15” sealed
3) Atlantic Technology 272 THX 12” sealed X 2

controlled by a MiniDSP 2x4HD and measured with a UMIK-2 via a 2021 MacBook Pro and REW.

My first measurements

My second series of measurements after placement tweaks

Average of all 6 points with no PEQ applied yet.

My room is lightly treated with a series of Auralex T-fussors on the ceiling, 2D diffusors on the side walls and a pair of 2’x2’x2’ bass traps in each front corner.

 

[latapx]

Try reducing the scale...the "average" plot goes from -30db to over 90 db...try 100 to 40...it would apply less "smoothing" and show the true colors of what is going on.

 

[William Lemmerhirt]

Try reducing the scale...the "average" plot goes from -30db to over 90 db...try 100 to 40...it would apply less "smoothing" and show the true colors of what is going on.

That’s what I was gonna say!

Usually the vertical window limits we use are 45-105 with no smoothing.
It’s more painful to look at, but is more representative of what’s happening.

 

[Pandaman617]

I had no idea about that! Thanks for the tips guys

 

[William Lemmerhirt]

I had no idea about that! Thanks for the tips guys

Roger that. I was gonna say too. It looks pretty good.

 

[latapx]

I had no idea about that! Thanks for the tips guys

Please post the results on the revised scale!!

 

[Pandaman617]

They’ll be up tonight when i get out of work!

 

[Pogre]

It really does look pretty good, especially with no EQ in the mix. But yeah, like the guys said a smaller window will show potential issues in better resolution, if there are any.

 

[Pandaman617]

New scale with no PEQ

 

[Pandaman617]

New scale with PEQ applied but no Audyssey XT32, just REW filters.

 

[Pandaman617]

Thank you guys so much for the info about the scale! I’ve been using REW for about a year now and had NO IDEA about that feature!

 

[William Lemmerhirt]

Still looks really good! Not surprised, but now it’s easy to compare notes with others.
Well done.

 

[Pandaman617]

Still looks really good! Not surprised, but now it’s easy to compare notes with others.
Well done.

Thanks man!

 

[Pogre]

That does look very good! I felt like I got another sub upgrade when I got mine dialed in. It makes an audible difference, huh?

 

[Pandaman617]

That does look very good! I felt like I got another sub upgrade when I got mine dialed in. It makes an audible difference, huh?

Oh absolutely! I had 6 subs at one point and I’ve learned that in my relatively small section of an L shaped room it didn’t do much to have 2 more. Having 4 that are dialed in really adds that impactful but clean bass. Before I did this I thought my low end response was good but felt like it was boomy and watching Rogue One tonight on UHD Blu-Ray it’s so much tighter and audibly more enjoyable.