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Reducing "room boom"!

post #1 of 11
Thread Starter 
Is there anyway to cut out my subwoofer from playing the resonating frequency of my room walls? It sometimes hits a frequency and everything vibrates and booms. I cannot move my sub, but I wonder if you can manually reduce the loudness of a certain frequency.

These are the options on my sub:

7f20fb7c.jpg
post #2 of 11
That's what the notch filter is for. You isolate a certain frequency between 30-150Hz with the top dial, set the slope width (max would cover a larger range around the selected frequency) and reduce that frequency by upto -12db. You'd be guessing the frequency you want though without a sound meter and you couldn't totally eliminate that frequency, only reduce it.
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post #3 of 11
Thread Starter 
Yeah, reduce is what I want to do. Would it not be possible to use a sliding scale of low frequencies and go from there?
post #4 of 11
Quote:
Originally Posted by 98uk;13419981 
Yeah, reduce is what I want to do. Would it not be possible to use a sliding scale of low frequencies and go from there?

I was about to suggest that, all I could think of without a software synth was the expression evaluator in goldwave - you can make a pure sine wave at whatever frequency or a slope from x to y Hz IIRC.
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post #5 of 11
Quote:
Originally Posted by Darren9;13419684 
That's what the notch filter is for. You isolate a certain frequency between 30-150Hz with the top dial, set the slope width (max would cover a larger range around the selected frequency) and reduce that frequency by upto -12db. You'd be guessing the frequency you want though without a sound meter and you couldn't totally eliminate that frequency, only reduce it.

I don't know a ton about audio equipment, but I do know something about signal processing/filters. Wouldn't increasing the notch slope reduce the frequency range?

Pretty sweet that they include those filters on there, regardless! Did not know that they did that.

I'd try to keep the notch frequencies as narrow as possible and the notch level as low as possible to avoid losing too much sound.
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post #6 of 11
Quote:
Originally Posted by flushentitypacket;13429860 
I don't know a ton about audio equipment, but I do know something about signal processing/filters. Wouldn't increasing the notch slope reduce the frequency range?

Pretty sweet that they include those filters on there, regardless! Did not know that they did that.

I'd try to keep the notch frequencies as narrow as possible and the notch level as low as possible to avoid losing too much sound.

That sounds correct redface.gif I was thinking max would be max width of slope for some reason and not slope angle. I don't have slope on my sub, only freq. and level.
Edited by Darren9 - 5/8/11 at 12:50pm
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post #7 of 11
Could it more likely be a sub calibration issue?
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post #8 of 11
Cut tennis balls in half and put the sub on that. Only way without gimping the gain.
    
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by youra6;13435100 
Could it more likely be a sub calibration issue?

No, it's just where it hits the resonating frequency with my walls and makes everything shake! Apart from that it is great.

Although, anyone else just notice the "Line in Leet" and "Line out Leet"?

l33t.
post #10 of 11
Quote:
Originally Posted by 98uk;13419579 
Is there anyway to cut out my subwoofer from playing the resonating frequency of my room walls? It sometimes hits a frequency and everything vibrates and booms. I cannot move my sub, but I wonder if you can manually reduce the loudness of a certain frequency.

These are the options on my sub:

7f20fb7c.jpg

move it along the wall till you feel the vibration you want.
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