It's a KLH Audio Systems 120 watt plate amp. I'm fairly sure that it's 120 at 4 ohms. I was using to run a couple of JLW0's (also for sale HERE) and it sounded pretty good. Does have a very slight turn on thump when you first turn it on. Nothing major and you have to really be listening to hear it.
That's pretty much all the info I have on it. No idea how much it's worth so I'll just say 75$ shipped because I HAVE to list a price...but just make an offer or a trades for whatever.