Bass dropping off
- Thread starter nmartin40
- Start date
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brich
Active member
Sounds like your preamp tubes need to be changed. Thats a good place to start.
Welcome to The Board.nmartin40 said:
Before I help to troubleshoot this I have a couple of questions:
Is this a new issue with the amp, something that just started to happen?
How old are all the tubes?
Does this happen in all channels? Does turning the Bass control do anything?
What are your EQ, Gain and Ch Master settings?
How is your speaker cable? (it is a speaker cable, right?)
Dom
Hey all,
I appreciate the quick responses.
It just started happening. I replaced all the power tubes very recently, but none of the preamp tubes or rectifiers. I thought if a preamp tube went bad it would just be no sound. The issue began just before.
It happens in all channels. All of which have the presence at about 12:00, master at about 10:00, gain at 1:00, bass and treble at about 1:00 and mids at 8:00.
The cable is fine, I've tried numerous ones.
Thanks again guys. I really appreciate it.
I appreciate the quick responses.
It just started happening. I replaced all the power tubes very recently, but none of the preamp tubes or rectifiers. I thought if a preamp tube went bad it would just be no sound. The issue began just before.
It happens in all channels. All of which have the presence at about 12:00, master at about 10:00, gain at 1:00, bass and treble at about 1:00 and mids at 8:00.
The cable is fine, I've tried numerous ones.
Thanks again guys. I really appreciate it.
brich
Active member
The preamp tubes going bad can be intermittent. Mine did something similar when they started going bad. Good luck. I've read a lot of Dom's posts and he seems very knowledgable if it's more than preamp tubes.
brich
Active member
Tung Sol in V1 is highly recommended throughout this board. I tried it and am glad I did. Search the web for Doug's tubes and he recommends and sells tube combinations for different amps. I ordered the rock set for my Single Rec and it made a big difference in my tone. There is also a metal set. Both have Tung Sol in V1.
