Most suppliers try to enhance the maximum power ratings of their amps, pretending that this rating will mean for many people the actual capacity on which it is able to increase signals. This is an absolutely misleading strategy on purpose as of course most of the ordinary customers will automatically look for the bigger numbers without paying attention to the whys In real both maximum and peak power ratings are useless. Even if a car amplifier works on the maximum power, you can be sure that it will go bad within a short time. In real its the continuous power supply which you would always take into consideration. The value of RMS should be about 70% lower than the peak capacity. Peak capacities are only enlisted to get attention; they can’t be used on long haul. The weakest, mostly Chinese brands even use a made-up name I.L.S for power ratings which doesn’t even exist.