Most amplifiers do much better with plenty of air flow under and around the Chassis. Placing 4-6 washers on each mounting tab to raise an amplifier off the surface helps to keep an amplifier to run a bit more cooler,and a fan as well is a very nice addition to dissipate heat of which we all know is a death sentence for electronics. Id place the amplifier in a location that gets air flow and doesnt retain as much heat.