Hi. I have for sale 2 Marshall IBS heads. The first is a 300 watt into 4ohm silver jubilee 25th anniversary model 3530 in perfect electronic condition. My tech made a mechanical mod to support the pcbs behind the knobs which was a major failure on the IBS heads. This head was also cleaned and inspected for sale. With the mod this amp is 100% solid. Cosmetics: some scratches on the chrome. Better than it looks in the photos. The mirror chrome is impossible to photograph. This head is very loud and the EQ section is incredibly versatile from clean to grind. It will have a full set of NOS Marshall knobs installed prior to shipping. This head is very rare. It is also awesome. As used by NOMEANSNO/Rob Wright. The second head is a 200w bi-ampable 4 ohm minimum model 5522 (it was the combo version identical to the 3520). This head has the identical pcb knob support mod that you'll thank my tech for. This head was also cleaned and tested for sale. It is in perfect working condition. It does not come with the rack case in the photos. The Marshall blank plate can be included with either head, first buyer gets dibs. This head is in great cosmetic condition. None of the cracking or faceplate warp that you find on most of these heads. I have two new knobs coming to replace the ones that are missing caps. Another great head, sounds amazing. I've had many versions of the IBS line and I kept these two because they were the best of my collection. More photos will be added. Receipts for service will be included.