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Traynor Yba-1 breaking up too quick.

I wish there were some magical pedal called "distortion limiter" that would just calm down this amp a little bit. In my dreams right?
You might look at modding it a bit. Depending on which model you have, you might be able to get it to run a bit cleaner. Have a look here:

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These mods are by my local amp guru who knows these amps inside and out.

EDIT: That clip you posted sounds really nice BTW
 
Unfortunately these mods are more guitar friendly than for bass. I did somewhat similar mods to a friends YBA1 many years ago. Mods included SS/tube rectifier switch, fixed/cathode bias switch, tetrode/triode switch among other tweaks. Worked very well as a guitar amp. None of them would have improved the output capabilities of the amp. It's more power that the OP needs.
 
sounds like you YBA-1 is breaking up just a hair early, mine starts thickening and breaking up around 5. a recap and fresh tubes (if needed) would definitely help. Doug Pinnick of Kings X uses a YBA-1 as his main tone and enhances it with more powerful amps for the bottom end. that's what I would do, use it for your low mids and up and add a second high powered amp for a clean full range tone.
 
BassmanPaul said:
All the suggestions about clean boosts will not alleviate the fact that 50W is far less than the OP needs. It's the OUTPUT stage that's running out of headroom. Any boost that is applied will just make the amp run out sooner.

Correct, in fact I have to laugh--if the complaint is about the amp breaking up too soon, a boost pedal is the very worst possible suggestion!
 
I used to run a YBA1a with an EV15" and it was loud enough to get complaints.
The earlier version is a bit lean in the watts though.
you might be able to get some more volume by rolling off the bass a little and aiming for a more mid focussed tone. Thats what these amps do best.
 
Another option is to slave the output of your YBA1 into a power amp to run your cabs. You'll have to use a dummy load or DI box that can take a tap off the output while loaded with a speaker cab.