Up for sale is a very nice GK 400RB-IV. This is the 280 watt version. All functions of the amp work without issues. The only marks on it are 3 small scratches on the top cover. Everything else is very clean. Don't let the seemingly lower wattage of this amp fool you... these are "GK" watts and with an efficient 4 ohm cab, this amp will roar. Does NOT come with the rack ears. I will include a 1/4" to speakon speaker cable as these amps only have 1/4" outs. I maybe have used the amp at church 5 or 6 times. I also intended it to be my back up for my MB500. I've got a few hundred gigs on the MB500 with not even a sign of a problem... so the 400 is expendable. These are going for 499 at the discount on-line sellers. Looking for 265.00 shipped to ConUS48 only. Money order or PayPal. I pack well and ship fast !!