03-19-2008, 11:33 AM
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#6 of 7 
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Member
Location: Katy, TX
Join Date: Aug 1999
Local Time: 09:23 PM
Local Date: 09-07-2008
Posts: 6,484
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Re: Advice on 7.1 setup
Welcome to the Forum, Paresh!
I’ll leave it to your installer to determine if you need a 7.1 system or not. Personally I’ve been perfectly content with a 5.1. I honestly don’t think there are many home installations that truly need 7.1.
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Now the technical jargon. The terms spl and extension I am not familiar with, so I had to look them up. If I understood correctly extension is the ability to produce low frequency sounds, and sound pressure level is more or less the volume that the sub could produce? The loudness of the sub is not as important as the extension to me.
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Your homework yielded the correct answers.  If you care about extension over SPL, then I strongly suggest you ditch that 10” sub. A second identical sub will get you more SPL of whatever it puts out, not lower extension. For what you’re going to spend for a pair of those Energys, you can get any number of Hsu or SVS subs that will get below 20 Hz, such as the PB12 Plus/2, PB12 Plus or PB12 NSD. I had a chance to check out the NSD a while back, which is least of those, and it had no problem getting down to 18 Hz in my cavernous 9000 cu. ft. room.
Regards.
Wayne A. Pflughaupt
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