First sweeps with REW - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 11 Old 01-16-15, 02:21 PM Thread Starter
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First sweeps with REW

I finally have my HT setup in my basement.
AVR - Denon x4000 with Audyssey XT32 with Sub EQ
Subs (2)HSU VTF-3MK4
Sub (1)HSU MBM-12 Mid Bass Module
Main speakers - (2)Klipsch RB81 II, Center (1)Klipsch RC62 II, (4)Surrounds - Polk in-ceiling 8"
- Left MK4 and MBM-12 on Y-Adapter to left sub output
- Right MK4 on right sub out (I tried the MK4's on one output and the MBM-12 on one but the way I have it seems better).
- Both MK4 subs located close to R and L main speakers and close to corners and equal distance from MLP
- MBM-12 located between subs centered in middle
- Both MK4's crossovers set to 50Hz
- MBM-12 crossover set to Out (50Hz to 150Hz)
- AVR crossovers set to 200Hz (tried 150Hz but graph is better at 200Hz and I think it sounds better)

I do have a MiniDSP Balanced 2x4 but have not hooked it in the system. Not sure how to best hook up the 3 subs if I do decide to use it?

What do you think and what would you do next if anything? I think it sounds good, but you know how that goes! All advice and comments are appreciated! I've been reading and waiting for years to properly use REW!

Audyssey ON and No smoothing
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post #2 of 11 Old 01-17-15, 07:42 AM
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Re: First sweeps with REW

Looks very good. Get a movie on!
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post #3 of 11 Old 01-17-15, 08:54 AM
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Re: First sweeps with REW

Quote:
JohnM wrote: View Post
Looks very good. Get a movie on!
Even though there are some hefty dips? Sorry, I'm not experienced yet so I'm still figuring it out but that dip at 54hz essentially is inaudible during listening. Some kind of cancellation going on yes?

How impossible is it to treat the room to get a no smoothing chart thats flatter with only +/- 3db?
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post #4 of 11 Old 01-17-15, 10:06 AM Thread Starter
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Re: First sweeps with REW

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JohnM wrote: View Post
Looks very good. Get a movie on!
Thanks John!
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post #5 of 11 Old 01-17-15, 10:11 AM Thread Starter
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Re: First sweeps with REW

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Bmxer241 wrote: View Post
Even though there are some hefty dips? Sorry, I'm not experienced yet so I'm still figuring it out but that dip at 54hz essentially is inaudible during listening. Some kind of cancellation going on yes?

How impossible is it to treat the room to get a no smoothing chart thats flatter with only +/- 3db?
You just gave me an idea. My main sub-woofers crossovers are set to 50Hz (at least by the dial on the back, how accurate is the dial?) Maybe I should set the crossovers to 45Hz and try, just an idea as I realize the slopes overlap. If it is a cancellation or null I will work on possible slightly re-positioning.
And then of coarse I do have a MiniDSP but holding off on hooking that up until I'm more comfortable with what I'm doing now.
Update:
I tried 45Hz and 55Hz for main sub crossovers. It actually made things worse, so back to 50Hz.

Last edited by finalrinse; 01-17-15 at 10:53 AM. Reason: re-ran test
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post #6 of 11 Old 01-23-15, 10:19 AM Thread Starter
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Re: First sweeps with REW

I've added a MiniDSP and EQ filters. Still playing around but this is first attempt.
Green is Audyssey and Red is Audyssey with MiniDSP and EQ filters. What do you think?

First sweeps with REW-all-subs-audyssey-minidsp-eq.jpg
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post #7 of 11 Old 01-23-15, 08:32 PM
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I'd say looks like a nice house curve! I bet it sounds great.
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post #8 of 11 Old 01-23-15, 10:37 PM Thread Starter
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Re: First sweeps with REW

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I'd say looks like a nice house curve! I bet it sounds great.
Thanks! Yes, I've really been enjoying it! I decided to stop fiddling with it for now and just sit back and watch/listen to movies and concerts.
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post #9 of 11 Old 01-23-15, 10:51 PM
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That can be hard to do once the tweaking begins. lol. Good choice though. Let it all sink in and really evaluate. Most of all, enjoy!
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post #10 of 11 Old 01-24-15, 01:15 PM
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Re: First sweeps with REW

Your work and the result are to be applauded. Bet it sounds great. HOWEVER... addressing your earlier post (for future reference):

Quote:
Bmxer241 wrote: View Post
Even though there are some hefty dips?
Those dips are narrow enough that, in real-life listening terms, even a sub expert would probably never hear them, as you pointed out in your next sentence...

Quote:
Sorry, I'm not experienced yet so I'm still figuring it out but that dip at 54hz essentially is inaudible during listening.
Quote:
Some kind of cancellation going on yes?
Precisely, and it happens to some degree in every listening room.

Quote:
How impossible is it to treat the room to get a no smoothing chart thats flatter with only +/- 3db?
Pretty impossible.

Any result can be improved upon. How do you know when to stop, when to continue??
  • If you are enjoying the fiddling, keep going.
  • If you just want it to sound great, remember that
    • Narrow dips are inaudible under normal listening conditions.
    • Narrow dips are inaudible under normal listening conditions. Repeated for emphasis.
    • Most fiddlers - self included - tend to EQ well beyond the point where it helps the music or movie sound better.
    • More EQing usually gives a result that applies to a narrower listening area (not necessarily a problem) and makes other areas in the room sound worse (also not necessarily a problem).
Again, you did fine work. Just taking the opportunity to make a couple of points about EQing in general.


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