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In Reply to: RE: How will efficient speakers/amp on batteries compare? posted by claudej1@aol.com on March 20, 2012 at 10:34:48
How does a little T-amp produce enough power to drive the 15 inch woofer on a Cornwall?
Follow Ups:
A large driver does necessarily require more more; often the opposite is true. Sensitivity, loading, impedance and phase angles, and QTS are more helpful indicators.
A large, efficient, low QTS driver with appropriate loading is likely to require less power and damping to achieve similar volume levels than a small, inefficient driver in a tiny bass reflex enclosure... you should also experience less sense of constraint/unevenness/strain, even if extension is not as 'deep'.
Cheers.
BTW, the K33 is the same woofer as in a Cornwall, it will just play 6 db less loud vs. a Khorn.........so what?
I'm using a T amp (20 Watts per channel) on some FH-1 cabs with 15" Klipsch K33's, which are 104 db/w efficient. I'm also doing a 6 db boost at 60 Hz. to compensate for the rapid rolloff. My Audyssey is crossing them at 70 Hz. to a tapped horn sub.I only listen to music at 80-85b db (attached condo) to keep from pissing off my neighbors too much and to save my hearing for old age.
Paul Klipsch himself always recommended 20 W per channel and felt that 17 db of headroom was plenty for his home recordings of live symphonies. He used a 30 Watt/ch amp (Crown D-60) at his house when I was there.
Edits: 03/20/12
What would you recommend for an amp running from batteries and speakers (no biamp) for less than $3K?
Why don't you try the Redwine amp?
Yes, I think I'll try the Red Wine Audio Signature 30.2 or its successor. Great reviews for the 30.2.
Why no bi-amp? That is one of the most cost effective improvements you can make to your system. And when considering battery powered amps, can significantly improve your dynamic range.
Wouldn't biamping require an active crossover that plugs into the mains? I seek total isolation from the mains.
An active crossover could easily be battery powered (+/-12V), or, passive solutions also exist.
Used cornwalls or a DIY with cheapo tripath for under 800.00 if you can find them local. You might be able to get Altec Model 19s in you price range.
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