2 Channel Inline Room Correction - AVS Forum
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post #1 of 30 Old 10-23-2012, 12:25 PM - Thread Starter
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I recently started re-evaluating my home audio setup and have continually found myself interested in leveraging all the benefits of room correction that have come up in the last few years.

However, having a strictly 2 channel setup, I've found the majority of A/V solutions to be a little overkill.

I currently have the following 2 channel solution:
Roku (+ Plex Server for lossless audio library) HDMI to TV > TV Optical Out 2 channel to a Benchmark DAC1> Creek 5350 SE Integrated Amp > AV123 Ref 1.8 floor standing speakers.

The room is cottage size square living room with heavy curtains on all the windows and heavy rugs on the floor as well as careful speaker placement.

My goal is a flatter room response for critical music listening. I currently can't seem to escape standing waves no matter how I place my speakers.

Rather than throw out my DAC1 and amp by going towards a dedicated receiver with room correction, I've been looking for something standalone that I can put before my DAC. The only reasonably priced solution I've found for this is the OpenDRC DI. However, that option doesn't appear to be widely accepted (from searching here as well as the MiniDSP forums).

Is there any other accepted 2 channel room correction standalone hardware that can take an optical in, apply the proper filters and send to an optical out?

I've also looked at the various software correction solutions, but I really prefer appliance type boxes for my front ends (Roku, Boxee, Smart TV, etc..).

Cheers!

Chris
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post #2 of 30 Old 10-23-2012, 06:34 PM
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The Behringer DEQ 2496 has digital ins and outs. It is very flexible, offers Auto-EQ and full manual control.

It isn't the easiest thing in the world to use though.


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post #3 of 30 Old 10-23-2012, 07:16 PM
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RC in modern AVRs does more than just EQ. Some stereo receivers seem to have RC but the best versions are only found in MCH AVRs if you want the best.

Audiosceptics accept audio trials using 25 people. A recent Oxford study with over 353,000 patient records from 639 separate clinical trials shows for every 1,000 people taking diclofenac or ibuprofen there would be 3 additional heart attacks, 4 more cases of heart failure and 1 death every year.

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post #4 of 30 Old 10-23-2012, 07:23 PM
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DSPeaker Anti-Mode 2.0 Dual Core


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post #5 of 30 Old 10-23-2012, 07:29 PM
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DEQX if you want the best room correction, although pricey at $3k
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post #6 of 30 Old 10-23-2012, 07:47 PM
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Key questions:

- are you looking for 'full range' room correction? There are quite a few units out there that do this, many in AVRs, but most of them sound like cr*p. Really above 250Hz you are correcting your speakers, not your room...most errors >250Hz are speaker related not room hence the difference.
- do you have the ability yourself to work out what corrections to apply? Units like the Behringer may be cheap but they are also dumb. They don't tell you what EQ to use. You would need to combine them with a measurement platform like Room EQ Wizard to give you some filter values.

Answer those Qs and I can make some recommendations!


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post #7 of 30 Old 10-23-2012, 07:49 PM
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Kal just reviewed the DSPeaker Anti-Mode in the recent Stereophile and thought it was a wonderful piece, and very reasonable at $1200 or so.
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post #8 of 30 Old 10-23-2012, 08:12 PM - Thread Starter
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Quote:
Originally Posted by Nyal Mellor View Post

Key questions:
- are you looking for 'full range' room correction? There are quite a few units out there that do this, many in AVRs, but most of them sound like cr*p. Really above 250Hz you are correcting your speakers, not your room...most errors >250Hz are speaker related not room hence the difference.
- do you have the ability yourself to work out what corrections to apply? Units like the Behringer may be cheap but they are also dumb. They don't tell you what EQ to use. You would need to combine them with a measurement platform like Room EQ Wizard to give you some filter values.
Answer those Qs and I can make some recommendations!

Yes, I'm looking for full range correction/EQ. I'd basically like to leverage all the cheap DSP capabilities out there to get a flat and time/phase coherent response at the middle of my couch where I spend too much time listening to music.

I'd really like equivalent capability to what's in the current crop of top room correction AVR's, without having to buy a MCH AVR.
I'd like it to cost under $1k if possible. Once I get above that, it seems like I'm better off just chucking my amp and DAC.

I'm perfectly comfortable generating my own measurements and filter files using a computer/mic and leveraging the various DRC tools available.

Thanks for all the replies. Looks like I have a couple answers already.

Cheers!

Chris
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post #9 of 30 Old 10-23-2012, 09:05 PM - Thread Starter
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Originally Posted by jeffkad View Post

Kal just reviewed the DSPeaker Anti-Mode in the recent Stereophile and thought it was a wonderful piece, and very reasonable at $1200 or so.

This seems to be exactly what I'm looking for. smile.gif
While this trumps the OpenDRC DI in usability, do I gain anything performance wise in a small 2 channel room?
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post #10 of 30 Old 10-24-2012, 12:33 AM
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No, the OpenDRC solution is superior to most available room correction products. Nevertheless the learning curve is rather steep.

Markus

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post #11 of 30 Old 10-24-2012, 07:55 PM
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miniDSP

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post #12 of 30 Old 10-24-2012, 10:52 PM
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Yes, OpenDRC with http://www.minidsp.com/applications/digital-room-correction/acouratedrc

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post #13 of 30 Old 10-25-2012, 10:04 AM
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Perhaps; I seem to remember OpenDRC being quite a bit more complex and expensive than the basic 2x4

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post #14 of 30 Old 10-25-2012, 12:09 PM
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Quote:
Originally Posted by markus767 View Post

No, the OpenDRC solution is superior to most available room correction products. Nevertheless the learning curve is rather steep.

Funny you are advocating DRC here when on the other thread you are bashing it!


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post #15 of 30 Old 10-25-2012, 12:14 PM
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Quote:
Originally Posted by Nyal Mellor View Post

Funny you are advocating DRC here when on the other thread you are bashing it!

I'm "bashing" digital room correction? No. I simply acknowledge that audio reproduction is a very complex subject and not just black and white.
The OP wants to experiment with digital room correction and AcourateDRC is probably the best tool for doing so. All other solutions lock you into a certain methodology without telling the user what that methodology would be. Do you know the optimization methodology of Audyssey, Harman, Dirac, Anthem, etc.?

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post #16 of 30 Old 10-25-2012, 01:00 PM - Thread Starter
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Thanks for all the replies!

Looks like OpenDRC is the way to go.

I'm sure I'll chime in again when I try to set the thing up. tongue.gif
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post #17 of 30 Old 10-25-2012, 01:09 PM
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Good choice. Uli Brueggemann (who wrote the software to generate filters) is a very friendly and helpful guy.

Markus

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post #18 of 30 Old 10-26-2012, 10:51 AM
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Originally Posted by markus767 View Post

All other solutions lock you into a certain methodology without telling the user what that methodology would be. Do you know the optimization methodology of Audyssey, Harman, Dirac, Anthem, etc.?

You seem to be unwilling to use an RC system unless they give you all their IP; most of us are more concerned with the quality of the end result.

Noah
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post #19 of 30 Old 10-26-2012, 11:34 AM
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I'm very much concerned with the end result that's why I want to have "all their IP" tongue.gif

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post #20 of 30 Old 10-27-2012, 01:31 AM
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Originally Posted by estand View Post

DEQX if you want the best room correction, although pricey at $3k



What does the DEQX do that others don't to justify the price?
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post #21 of 30 Old 10-27-2012, 01:35 AM
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Originally Posted by Kal Rubinson View Post

DSPeaker Anti-Mode 2.0 Dual Core


Has your review been published?
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post #22 of 30 Old 10-27-2012, 07:28 AM
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Has your review been published?

Yes.  November issue.


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post #23 of 30 Old 10-27-2012, 06:08 PM
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Yes.  November issue.


Thanks Kal

Your opinion briefly?

Only covers 16 - 500HZ

Enough adjustment?
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post #24 of 30 Old 10-27-2012, 07:17 PM
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1. My comments are in the report.
2. Yes. Above that point, acoustical treatments are better and practical.

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post #25 of 30 Old 10-27-2012, 07:46 PM
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What does the DEQX do that others don't to justify the price?

32/192 DACs, 4th generation circuitry (10 years of heritage), linear phase crossovers, group delay correction, volume control, replaces your preamplifier and your DAC...


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post #26 of 30 Old 10-28-2012, 06:31 AM
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I'm very much concerned with the end result that's why I want to have "all their IP" tongue.gif

But you know they won't torpedo their own businesses to make one sale to you. I can't seem to convince Coca-Cola to send me thier recipe either, even though I've tod them I won't buy it until I know how they get that taste.
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post #27 of 30 Old 10-28-2012, 07:25 AM
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But you know they won't torpedo their own businesses to make one sale to you. I can't seem to convince Coca-Cola to send me thier recipe either, even though I've tod them I won't buy it until I know how they get that taste.

True but only if all you want to do is to copy Coca Cola. Science is about the "why". Otherwise we still would be sitting in caves drinking Coke.

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post #28 of 30 Old 10-28-2012, 08:02 AM
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For a much less expensive option, it might be worth looking at the JBL MS-2. It's a "car" piece but no reason why it can't be used at home.

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post #29 of 30 Old 10-28-2012, 10:01 AM
 
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science is about the 'maybe'

math is about the 'why'
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post #30 of 30 Old 08-18-2013, 08:47 AM
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Quote:
Originally Posted by mellroc View Post

Thanks for all the replies!

Looks like OpenDRC is the way to go.

I'm sure I'll chime in again when I try to set the thing up. tongue.gif

Sorry to bump up this old thread but I am wondering which way you went? I am also currently looking into the Anitmode dual core and the Open DRC.

Thanks,
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