2. amps-preamps
  3. 1301602265

AUDIO RESEARCH D-76A

I am new to this trade so bare with me if I ask dum questions.
I have a AUDIO RESEARCH D-76A power amp that I been using for few months now. as you probably know this amp has the most tubes than any other tube amp that I can remember. the middle of the amp are four 12AX7. I notice that one of the 12AX7 [middle top] are not lighting up nor hot. so I had all the sockets replace but still no light nor hot. I was told that its normal. how could it be? will this de-grade my sound? please enlighten me. I will appreciate any advice. thanks
torogi

Showing 1 response by lewm

lewm
12,448 posts
 
Dear Torogi,
I don't see where you say you have any problem with how the amp sounds. It is highly improbable that it could operate properly if indeed those tubes were not firing up. It is often difficult to see the glow from a tube; have you looked at them in a darkened room at night? I suspect that you have no problem at all. Or is there something perceptibly "wrong"? If so, what?
More to discover