I am curious if anyone has done this with success. I have read the manual that comes with it and it states that you can plug the speaker tap from a tube amp directly into the amp input and put the switch to "speaker" mode and it will safely record amps up to 1700w and it doesn't matter what ohm tap you use from the output transformer's secondary. I have done this a few times when I don't have the liberty to plug into my 4x12 cabinet and shake the walls next door. It works fine at first, but within about 15 or 20 minutes I can detect a sort of plastic burning smell and I get scared and turn the amp off. The smell seems to be coming not from the amp itself, but from the Type 85 unit, or perhaps from my plastic cased hard drive which is placed on top of it. Any idea what the risk of doing this is? I am somewhat comforted at the fact that the smell is not coming from the amp, but it's sort of a catch 22 because if the Type 85 fails, then so does the amp... The amp is a Peavey 5150 120w tube guitar amplifier. I am using the amp in 8Ω mode, but maybe I should use 16Ω instead? Would that make it any safer? I am not so comfortable actually doing this even though Countryman states without doubt that it is capable, so I would love any advice or insight on the matter.