There have been many attempts at creating well-behaved, full-range switching amplifier designs. As it stands today, there are several good technologies to choose from... but there is one that you can believe stands out above all others... it's called Single Cycle Control and it is central to JL Audio's HD amplifiers. JL Audio has mated this revolutionary core technology to legendary R.I.P.S. power supply, advanced thermal management systems and a full complement of studio-grade processing features to put the JL Audio HD amplifiers in a performance class all their own. Of course, being Class D switching amplifiers, you can expect low current draw and a very compact chassis (and you won't be disappointed on either front). But, what makes the HD amplifiers really special only becomes clear when you listen to one. Brand: JL Audio Number of channels: 4‑channel Total wattage: 300 watts Class: Class D RMS power rating: 150 watts RMS Feature: With Crossover, With Bass Control, Bridgeable