2. amps-preamps
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Tube microphonics

Hello. I am using Audio Research Ref 750 mono blocks and they in front of my speakers but off to the sides. Someone told me on another site that if I move the amps beside the speakers and not in front of them , my system will improve immensely. It will reduce tube microphonics. What are your opinions of this and I just want to say that I’m very new to tube amps so this is something I never heard of before. Thank you all. 

tattooedtrackman
gregdude
222 posts
 

Here's another tidbit of audio nervosa; never mover tube gear warm, it must be totally cooled down first. To do otherwise is to invite the tubes to become microphonic! 

jjss49's avatar
jjss49
6,612 posts
 

Here's another tidbit of audio nervosa; never mover tube gear warm, it must be totally cooled down first. To do otherwise is to invite the tubes to become microphonic! 

and this is why i have daily deliveries of dry ice!!! 😂🤣😆😃

carlsbad2's avatar
carlsbad2
2,036 posts
 

@mulveling  Exactly.  Because of their position in the signal path, any noise shows up in the speaker.  

Yes, I've returned some 6sn7s for microphonics.  but I eventually found a couple of pair that were very nice.  the 6922 and equivalents I haven't found to be very microphonic, just poor noise floor on some tubes.  but they are in the same challenging spot in the signal path.

Jerry

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