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In Reply to: RE: Subwoofers and Quads posted by Zombie on August 25, 2021 at 12:56:41
Surely this is a room null? In which case, a DWM won't do anything for you - you need to implement some DSP room-correction that can 'fill in' 70Hz.
Andy
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filled in effectively without causing dangerous amounts of overdrive at the frequency in question, as all the power you pump in just continues to cancel. If they have found a way around this, I'd be interested in knowing.
Mark in NC
"The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon
You are correct that you can't just boost the 70Hz with a typical PEQ filter. It won't work because you just drive the cancellation deeper while overdriving the amp and speaker.
But ... you may be able to use an all-pass filter at 70Hz and improve the notch. You can do all-pass with a miniDSP 2x4HD. I've had some success with this approach.
But the way the DWM might be able to fill it in is by placing the DWM at a spot in the room where that cancellation does not exist. I use two DWM's this way and they removed cancellations that I had between 100 and 180Hz.
Agilist, Musician, Photographer, Audiophile
Magneplanar: 3.7, CC5, MC1, DWM; Outlaw: UltraX12, LFM-1C; Emotiva: XMC-1, PA-1; Nord: Nord One NC500DM; Outlaw: Model 7500; OPPO 205
Nt.
Mark in NC
"The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon
I was advised against DSP to protect the ESLs against overloading at that frequency. DSP was my first thought, though.
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