• Hello and Welcome to HiFiVision.com - an online community for the home entertainment and tech enthusiasts!

    If you would like to ask a question, participate in a discussion and view attachments please Register yourself.

Chronicle of room treatments to equip room with the ability to play HT at reference levels

liverpool_for_life

Active Member
Joined
Feb 2, 2015
Messages
275
Points
43
Location
Chennai
So, as I continue to wait (and wait) for my new subs, I look for ways to improve on my current subs' response in my room. Talked to Mark Seaton and asked him if there was any way I could use my minidsp NanoAVR HDA. My preference was to put the AVM 60 last in my chain (with the balanced outs) with the Oppo 103 acting as my input switch. So, the only place to put the nanoAVR was between the Oppo and the AVM 60.

I'd need to generate PEQ filters using REW and import them to the minidsp unit. Of course, ARC would need to have been enabled on the AVM 60 prior to this step. Only one problem though: Bass management happened on the AVM 60, so the minidsp would not see the bass managed signal. Mark's recommendation to fix this was to generate filters based on the sub's response up to around the crossover area and then put them on all of the speakers' channels. That'd work!

So, that's what I did and below's the resultant sub response compared to just running ARC. Significant difference in measured response and, of course, during listening.

So much more detail that I'd never heard before in music. Instruments and vocals are also better.

Bass is the foundation on which everything else rests. Get that right and the rest of the stuff can blow your mind away!

effect_of_rew_peq.jpg
 
SPONSORED ADS

SPONSORED ADS

liverpool_for_life

Active Member
Joined
Feb 2, 2015
Messages
275
Points
43
Location
Chennai
How have you planned to improve the huge dip between 30 - 40Hz ?, otherwise 10-80Hz seems good after EQ (red trace)..
Sorry, I think you were looking for more detail wrt placement as well. The current plan is:

1. Make speaker stands for mains.

2. Move current subs from their current positions to 1/4 width away from the respective side walls along the front wall.

3. Move the diffusers up from their current position on the rear walls and see if I can accommodate the dual JS-12's along the rear wall, right opposite the current subs.

This ought to take care of my nasty length modes. Play around with gain and delay settings for the JS-12's to see if it will also fix the width mode. If that doesn't work:

4. Move the JS-12's 8 ft from the rear wall and put them alongside the wall, either side of my LP. Adjust sub settings. If that doesn't work:

5. Put one JS-12 up front, right in the middle. Find the best place for the other JS-12.

That's it. Now, if only I could get them home..
 

liverpool_for_life

Active Member
Joined
Feb 2, 2015
Messages
275
Points
43
Location
Chennai
What can I say? I wish I'd asked Mark before about how to integrate the minidsp into my system before instead of just fixating on the bass management issue. There is almost always an acceptable workaround for these sorts of issues. REW PEQ on top on ARC rules!

Movies and music just sound a level above than before. Getting closer to accurate bass produces subjective improvements that can't be imagined by looking at measurements alone.

Wow, just wow!
 

elangoas

Well-Known Member
Joined
Nov 4, 2009
Messages
7,047
Points
113
Location
Madrasapattinam
Sorry, I think you were looking for more detail wrt placement as well. The current plan is:
Not a problem.. Yes, i was hoping if you would try to re-position the present dual subs in the room to reduce that dip before you add two more subs..

Cool.. So you have anyways planned to re-position it..
 

matbhuvi

Active Member
Joined
Nov 1, 2011
Messages
521
Points
43
Location
Bangalore
Bass is the foundation on which everything else rests. Get that right and the rest of the stuff can blow your mind away!

View attachment 37509
That's pretty good RTA curves. Can you post the 20 - 20K full spectrum as well.

I am also doing my dedicated HT room inside my tiny apartment space. This is where i am currently. This is without EQ. I am not sure it is worth fighting against the 30hz dip which has very narrow Q.

Screen Shot 2019-07-22 at 7.19.26 AM.png
 
SPONSORED ADS

Top