Jump to content

2 DT50's Amp A amp B Volumes w/ HD500

Recommended Posts



I have had a DT50 112 for some time (I also have the DT50 Head but this is being sold once repaired) which I bought when my head blew up (for the second time!!) and I just picked up a DT50 212 because it was cheaper than any DT50 112 I could find.


Really I bought this because I have reoccurring nightmares of my DT50 blowing in the middle of a show, especially after my experience with the head. However I just love the modeling and tone I can get from this thing so until another company produces this type of integration I will need to rely on multiple unreliable amps (lol... I do truly love the DT50 just not their power transformers).


to the point:


I decided that since I have two working DT50's I may as well goof around with daisy chaining them and have found the amp B (the 212) to be considerably louder than amp A (the 112) ..... so I thought DUH! the 212 is ... well a 212 16 ohm setup. So logically I disconnected the Vintage 30 and ran the single speaker to the 8 ohm output. Well.... that didn't solve the problem, amp B is still considerably louder. I am using a dB meter.


this is the case when adjusting amp model volumes, mixer volumes, left, right.... you name it I have played with it. the only way I can level them is the Master volume on the amp it self. and it is extreme. I have amp A @ 11  :P  and amp B @ 2.5


Any thoughts?

Share this post

Link to post
Share on other sites

I assume you know about the pentode/triode switch and LPM.  Could it be your power tubes?  Are they stock?  Is one pair biased hotter than the other?


I would imagine that no 2 amps are ever EXACTLY alike, but would not expect a highly noticeable difference either...


BTW, I'm not a chick, that's my next GF once I track her down...

Share this post

Link to post
Share on other sites

Okay, I know its been a bit but an update and concern now.


So I had the DT50 112 already and bought the DT50 212 and had volume issues. Ultimately the 212 was a pain so I returned it and got a 112. So now I have two DT50 112's.


Still had a huge volume difference. My older DT50 112 is quieter (significantly) than both the used 212 and 112 that I bought....


So I just leave one cranked and the other around 2.5-3. It doesn't matter what order the amps are place in, its always quieter.


So we though bias and tubes perhaps.


Well I noticed some rattle the other day in one of the tubes of the older amp and decided it was time for new power tubes. 


  • I bought a matched quad and retubed and biased both amps.
  • Bias around 36mA +/- 0.5 (that pot is REALLY hard to get 36 spot on)
  • I decided to try out the Eurotube E34L JJ's (they're alright, don't really notice a big difference)


After new matched power tubes in both amps and the bias as close as possible the volume difference is still huge. I also notice the lights seem much dimmer on the quieter amp? hmmmm.... could be a symptom or different bulbs but thought it was worth mentioning. 


Any ideas? I did check fuses as well to make sure they match.

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...