2. amps-preamps
  3. 123647-12768

How should I install the new tubes in my stereo amplifier?

Hi Audiogoner,
It is time to change the tubes in my Shindo El84 amplifier, and I am ordering a new set of tubes which included the two matched pairs of Mullard EL84.
My question is: Should I install one matched set on each channel or split the matched set to half and install to each channel to keep the amp balance?
Thank you
dangcaonguyen
dangcaonguyen OP
206 posts
 
Thanks Newbee.
Yes, it helps a lot. I cant find any bias pot on my amp. I will have to check with someone to see if it is auto bias.
Calvin
czarivey
5,946 posts
 
Matched tubes must be placed in one push-pull pair per each channel.
atmasphere's avatar
atmasphere
12,155 posts
 
Newbee is correct. A matched pair should be placed together. This insures that the amp has the lowest distortion and makes the most power.

If they were to get mixed up, you would be far more likely to experience a channel imbalance! Keep your matched pairs together.
dangcaonguyen OP
206 posts
 
Thanks Gentlemen,
I just talked with Matt at Pitch Perfect Audio. My amp is autobias. I only need to install a good set of tubes and i am good to go. You are right about the matched pair shoud come together.
thanks
More to discover