To be totally honest im not sure if this is the guitar version of the bass head, but have used it no problem's with a bass. There's a lot of info on the net about these head's. It say's 400 on the front, but the inputs on the back say 300 at 2ohm's and 210 at 4ohm's ( but also states 800 watts near the voltage output) ive only used it with two 8 ohm cab's giving me 4 ohms, but have never had to run it past 4 on the volume's in any gig situation . Normally plug into the input that gives the selection of both channel's together. This amp is incredibly loud and solid, vinyl in good nick, small piece missing of the vent grill on top and corner'c could do with a coat of paint. £70 plus postage