Dual Sub setup question to help fight a null? - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 36 Old 10-11-2013, 01:28 PM
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Any time you move subs around you make some things better and some worse. Although there are some placements that are really bad (I've found them on occasion), there's no such thing as a perfect placement. It's a question of what's important to you. One thing I like to do is move around the room and find a spot where the subs sound best. This will give you an idea of how good they can sound with proper placement. You'll probably never be able to get the subs sounding this good at the MLP, so if you can get the MLP to sound as good as that, then you know it's time to stop moving the subs around.
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post #32 of 36 Old 10-12-2013, 12:48 AM
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Here's some REW screenshots of the 30Hz null :cry:

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post #33 of 36 Old 10-12-2013, 01:00 AM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

the problem probably relates to having both of them at the front of the room.
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Originally Posted by braveheart123 View Post

Spread your subs in the room and excite room modes from different locations; preferably one each on opposing walls.
In the future, I'll probably try with one on the front right corner and another one on my rear left corner.
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post #34 of 36 Old 10-14-2013, 09:02 AM - Thread Starter
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Totally forgotten this thread and didn't notice it's still alive.

Anyway, I'm updating my result and hopefully will help others too.

Here's my latest FR graph at MLP and needless to say I'm very happy with it, finally! biggrin.gif



What I did is I stacked 4" thick of OC703 at the back wall (on top of the 2" OC703 + 2" air gap that's already on it) for more lower frequency bass trap, and added another PB12-Plus at the rear left corner, moved the original sub to the front right corner. And now I have an as smooth of FR at my seat as possible! So yes, multi-sub and spread them out, at least opposite corner/wall, would be the best solution.
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post #35 of 36 Old 10-14-2013, 09:19 AM
 
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Very nice! Congratulations on your efforts.
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post #36 of 36 Old 10-14-2013, 09:22 AM
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Quote:
Originally Posted by landshark1 View Post

Totally forgotten this thread and didn't notice it's still alive.

Anyway, I'm updating my result and hopefully will help others too.

Here's my latest FR graph at MLP and needless to say I'm very happy with it, finally! biggrin.gif



What I did is I stacked 4" thick of OC703 at the back wall (on top of the 2" OC703 + 2" air gap that's already on it) for more lower frequency bass trap, and added another PB12-Plus at the rear left corner, moved the original sub to the front right corner. And now I have an as smooth of FR at my seat as possible! So yes, multi-sub and spread them out, at least opposite corner/wall, would be the best solution.

Rock on !!!!

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Main System: PSB X2T, PSB XC, PSB XB, Cambridge Audio Azur 751R, Rythmik FV15HP, PSB S500
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