Weighing-in featherweight, SABER amplifiers still pack a heavyweight punch. These contenders bulk-up with the latest in class D amplifier technology, fueling them to go the distance. Title challengers include single 2ch & 4ch upstarters & three 1-ohm stable monoblock underdogs. Don’t get caught on the ropes against these maulers, they are the pound-for-pound prizefighter in the main event... SABER Standard Features 2-ohm Stable High Efficiency Class D Four Channel Amplifier Compact 5.00” Wide Chassis Design for Installation Versatility MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 12dB/Octave High Pass & Low Pass Crossovers 200mV-6V Low Level RCA Audio Inputs High Level Input w/ Signal Sense Auto Turn-on 8g Power Wire Input & 8g Speaker Wire Outputs 12dB Bass Boost Increases Low Octave Harmonics SB4-2500D Specifications 150w x 4 @ 4 ohm 225w x 4 @ 2 ohm 450w x 2 @ 4 ohm Bridged 2,500w MAX Power 80Hz Hi Pass Crossover 80Hz Low Pass Crossover Dimensions: 5.00”w x 2.00”h x 8.00”L