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A change in efficiency to the final sound

I have a p/p tube amp running a pair of 6Ca7's for about 30 watts per channel .
I have read here that p/p tube amps sound their best when they have to work a bit harder , as opposed to a SET amp that sounds best near idle .
My present speakers are claimed to be 92 db. eff.
If this amp is driving a pair of speakers rated at 85 db. efficiency , should it sound a bit better due to working a little harder or closer to its optimum level ?
Conversely , would the same amp sound a bit worse driving a more efficient speaker of 99 db. due to it working less hard or further away from its optimum level ?


Thank you

saki70
jrwaudio
357 posts
 
@saki70 it might be awhile before I get my Magnapan 0.7's More than likely another 6 weeks : (   But I will post my findings for what it's worth : )  I found this on my VAC PA 80 80 manual, I had to sent it in and the UPS guy might of been mad at me as it weighs over 70 lbs
They also did an over all upgrade caps etc
It still has the original KT 88 Golden Dragon Tubes

Ultra-linear or Triode?
The input amplifier, phase splitter, and driver stages are triode tubes operated in ClassA with no cut-off or grid current. The output stage is connected for partial-triode, well known for low distortion, good damping factor, and high efficiency. This technique was invented by Alan Blumlein of EMI in England, and was popularized in the US as "ultra-linear." VAC can convert amplifiers to triode connection for a small charge.

charles1dad's avatar
charles1dad
10,250 posts
 
Yes the input stage is class A as are nearly all input /preamplifier sections in amplifiers (power or integrated). I was referencing the  KT 88 "output stage" which is class AB. Pentodes can be wired to function in triode mode.
Charles 
asvjerry's avatar
asvjerry
4,941 posts
 
@millercarbon , +1

Well stated, and defended.  And being a 'fanatic' just indicates a level of enthusiasm above the mid-point of the bell curve...MHO.

Now, if one shows up @ AXPONA dressed in album sleeves with a hat like a woofer.....that could indicate 'extremist behaviour'...

...and Please, Dear God, don't let the sleeves be the clear plastic ones....

;)
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