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In Reply to: RE: Gotta disagree with this... posted by Triode_Kingdom on June 07, 2016 at 13:28:44
TK,
The OP has a SERIOUS thermal problem. If "Cornwalls", as you indicated, have bass extension issues, he needs to go to a multi-amped setup of some kind. The NAD SS amp the OP already owns should be satisfactory for bass duty. Let the OP DIY or commission a preamp/crossover/SE pentode main amp unit and add a bass commode.
Do you think an F3 of 90 Hz., along with a 24 dB./octave Linkwitz-Riley configuration would "unload" the Klipsch or other suitable high efficiency speakers sufficiently?
Eli D.
Follow Ups:
I've yet to try a sub that blended well with any of my amps. I built a 24dB all-tube xover a few years ago as a last resort, but even that didn't cut it. The guy I bought the Cornwalls from had an expensive sub, but it sounded awful at any level at which it actually extended the bass. I've concluded that medium efficiency speakers and a larger amplifier (or headphones/tiny listening room) are the way to go with these pristine-sounding tube amps. Klipshorns are another possibility, but my livingroom is too small.
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Buy Chinese. Bury freedom.
Have you tried a SW driven by the speaker level I/Ps? Don't "daisy chain". Instead, simply connect the SW in parallel with the speakers already present. The SW's SS amp will pick up some of the tubed main amp's sonic signature. Adjust the SW's controls to fill in underneath the main speakers, where they are deficient.BTW, 16 AWG OFC zip cord is quite good enough for connecting the SW to the main amp. Remember, the SW's crossover presents a high impedance to the main amp below the "corner" freq. and above the "corner" freq. no load is present, making that high impedance too.
Eli D.
Edits: 06/07/16
The possibility of amplifying hum and noise from speaker-level signals would ordinarily turn me away from that. However, I've seen amplification from that level work OK in other applications. Yes, it's something to try when I get re-motivated on this subject. Thanks for the suggestion!
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Buy Chinese. Bury freedom.
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