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In Reply to: RE: Tube preamp sweet spot/amp compatibility? posted by Highdecibel on May 19, 2015 at 16:04:05
I presume you have the tubes biased between 90 and 110 ma. You might as well replace that 12bh7 in the amp and also the old RCA 6922 tubes in the preamp. I doubt that the output voltage of the preamp is not enough to drive those amps.
Follow Ups:
tubes at 100ma. I can drive the speakers stupid loud. so voltage is fine.
You can hookup the speakers to different taps on the amp and see if that improves things. Just a shot in the dark!
I'll try that on my day off tomorrow. the phase reversal did the trick!
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