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In Reply to: Re: 3rd subwoofer placement. posted by Ben P on February 8, 2007 at 15:22:38:
Hello Ben,David Griesinger has written many papers, and is an advocate of placing stereo subwoofers to the extreme right and left of the listening position. I've read several of his papers, including the one you linkd to.
Thanks,
Follow Ups:
Thanks Duke. I found his site right after I posted. Got some reading to do.That does sound like what he was suggesting. Have you messed with the 90 degree phase shift between the left and right that he suggests?
Hi Ben,I haven't tried the 90 degree phase differential that Griesinger suggests. So far I haven't found a plate amp that includes continuously variable phase along with the other features I want - namely fourth order lowpass filter that can be set to 40 Hz or lower, at least 200 watts output, line and speaker level inputs.
If you have any suggestions, I'm all ears!
Here you go:
Hello Ben,I thought I posted a reply to you yesterday but now I don't see it.
I wanted to thank you for going to so much trouble to help me! That was way, way above and beyond what I ever would have expected.
The Parts Express amp - I have a pair of those. And, I spoke with Rhythmik a couple of days ago also. Turns out their "4th order" crossover version isn't very adjustable. The crossover consists of a fixed 80 Hz second order filter cascaded with a frequency-variable second order filter. I want a fully adjustable 4th order filter.
Below is a link to another plate amp I found that looks promising. I'm communicating with the builder about a couple of custom features.
I'd like to get to know you a bit better now, but there's no way for me to e-mail you. So I invite you to shoot me an e-mail.
Thanks again.
Duke
Would this one do? Every amp I can find is missing at least one feature on your list. Probably what you've found too...
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