Hi, I’d like to see what my Deliverance II 60 head sounds like through my 59 Bassman 4x10 cab, which is 2 ohms. I know it wouldn’t provide full power, but would it be safe for the amp to set it to 4 ohms and use it with the 2 ohm cab?
Hi @khitchco welcome to the forum!
I think it depends a lot on how hard you are driving the amp. That will pull about twice the current from the amp than it is expecting. So that means 4 times more thermal power will be dissipated in the output transformer. I usually say mismatching is OK by one step: 8 Ohms to 4 Ohms or 16 Ohms to 8 Ohms, but this seems a bit uncomfortable to me. I think as long as you are not cranking it, it will work but that is definitely not how it is intended to be used.
I’m curious what @Terry thinks, though. I’d trust his advice over mine 
Thanks Dan. I definitely don’t normally crank the amp very loud at all but I turn it up to a healthy volume sometimes when the drummer comes over.
I wound up just wiring the speakers series/parallel to make it 8 ohms.
How do you like the sound? Sometimes people like the impedance mismatch. Well you could always set the amp to 16 now if you wanted to play round.
It sounds good except there’s a buzz in the amp that’s unusually loud. I made a new thread about it. Hopefully you can help me.