This is a Marshall JCM900 50watt 4500 model, and all the tubes were replaced and biased, the amp really screams, there is no problems with this amp at all, this is a high gain reliable amplifier, Head only cab not for sale, if you would like to play through it, you’re more than welcome to come by and plug in, serious buyers only, no low ballers or trade offers for things I didn’t mention, this is the baddest JCM900 I’ve ever played through, but I have other amps that do the same high gain thing, the amp is very clean, no tears or heavy scuffs, no rust at all, cleanest Marshall I’ve ever had, $1200 obo cash only, the only amp I’d trade for is a Marshall Vintage Modern 2466 100watt, so hit me up!