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Just got a new power amp
The PS audio s300 is supposed to have balanced inputs and outputs, but it isn't quad differential.  
Old SS amps
@devinplombier  yes, some amplifiers are not worth putting too much money into repairing, the better built ones like many of the old Krell amps is a different story. To buy a modern class A/B amplifier built like the old Krell amps would cost tens... 
Old SS amps
@devinplombier  Krell ksa 300s  
Just got a new power amp
When single ended rca is compared to balanced XLR, how many people are actually taking voltage measurements to level match each one?  
Old SS amps
@devinplombier regular preventative maintenance is desirable even with more modern amplifiers as they age. My 33 year old Krell amp has more protection circuits than a lot of modern amps have, but that doesn't mean it can't still have a catastroph... 
Class of operation for Tube Power Amps
@steakster what do you mean by class A all the way? The amplifiers may actually have higher power in class A/B above what they are rated for in the spec sheet at class A.  
I changed a Tube and…
Brent Jesse is the second best tube seller I know of, Andy at vintage tube services being number one.  
Leave it on?
@mylogic  many thousands of products are made from oil, how much do you think all those products will cost if we aren't using carbon fuels?   
Leave it on?
@mylogic I suppose you believe that oil is bad, but you would not have an audio system without it, even if you use solar power.  
How reliable is PS audio equipment?
@8th-note if I were you, I would have went on the PS audio forum, Paul's post, and Ask Paul to complain in a nice way about the problem, sometimes Paul will take care of you with little to no charge. I do agree with you that some of PS audio equip... 
Leave it on?
@gano if global warming was so dire, then we shouldn't even be listening to stereo equipment, it's not a necessity.  
Leave it on?
@larryi all my tube equipment have tube rectification, it's usually harder on the filament during turn on, even if tube rectification is used.  
Leave it on?
@larryi  my tubes always seem to last longer when I leave the equipment on 24/7, tube filaments always seem to burn out quicker when I power them on and off daily.  
Krell Moves to new location
@thecarpathian  you would think they would get the other designer's name correct, it's David Goodman not Goldman. I actually believe David Goodman designed more Krell amps than Dan D'Agostino did.  
Krell Moves to new location
@bulldogger maybe, but has Krell started manufacturing yet, and are they reestablishing a dealer network?