I have EL34's. I've heard people say that EL34's are preferable for guitar, while bass players may lean towards 6CA7's. I'm not sure there's a huge difference between the 2. you can also run 6550's with a minor mod. Ask Scott, I'm pretty sure he modded one of his YBA3's to run those.

Bringing the Traynor YBA-3 into the tech tomorrow. It has Sovtek EL-34s in there right now. I've had 6550s in these amps before and I didn't think they were a good match for the YBA-3 at all---I feel like these things sound best distorted, and I was only able to get the YBA-3 loud enough to do that a couple of times.Narrowed the choices down to:EL-34KT-77EL-34L6CA7I can't afford NOS tubes. I'm using the amp for bass and am going for a big, aggressive, overdriven sound. Like I had said in regards to the 6550s, I don't want a whole shit ton of clean head room, but I'd like more than these Sovtek EL-34s are giving me.

I meant to post this in the tech forum. Mods, please lock or delete thread.