The Sony Xplod XM-ZR1252 2-Channel Amplifier comes with a bass boost of up to 10dB at 40 Hz to deliver outstanding bass effect. With the inverted heat sink design the Sony XMZR1252 21 Channel ZR Series Amplifier keeps internal components cool to last long. Integrated with the high-level sensing power-on feature the Sony Xplod amplifier prevents you from running a separate turn-on lead making OEM integration installations easy and fast. The Sony XMZR1252 21 Channel ZR Series Amplifier comes with a removable terminal cover which keeps all the wire connections protected and offer a tidy look. The Sony Xplod measures 15.5 x 2.2 x 10 inches (W x H x D) and weighs 14 lbs.