Planet Audio AC1500.1M Car Amplifier &ndash; 1500 Watts Max Power, 2/4 Ohm Stable, Class A/B, Monoblock, MOSFET Power Supply, Remote Subwoofer Control POWER: Maximum Power Output of 1500 Watts at 2 Ohms into one channel. Maximum Power output of 750 Watts at 4 Ohms into one Channel. This amplifier is designed to run your subwoofer(s) giving them the power that they need to perform as they were meant to HIGH LEVEL INPUTS: Speaker level inputs are commonly referred to as high-level inputs. This input will be used to connect the AC1500.1M to your factory radio or aftermarket radio that does not have low-level (RCA) inputs. LOW LEVEL INPUTS: Line level inputs, also known as RCA inputs or low-level inputs, use RCA interconnect cables to link the AC1500.1M with the source unit. Most aftermarket radios have multiple pairs of RCA outputs that can connect to multiple amplifiers LOW-PASS CROSSOVER: A low-pass filter is an electronic circuit that removes all the notes below the filter's frequency setting. A low-pass filter will primarily keep high notes out of your subwoofer(s) VARIABLE BASS BOOST: Variable Bass Boost allows you to adjust the low bass within the boost range to just the way you like it DIMENSIONS: The AC1500.1M is 10 inches in Depth, 10 inches in Width and 2.4 inches in Height. It can be installed in a variety of different places due to its slim and compact design WARRANTY: Planet Audio Systems provides a Powerful 6 Year Platinum Online Dealer Warranty so long as the purchase is made through Amazon Dot Com