BOSS Audio AR1500M 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. MAX 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. Speaker level inputs will be used to connect the AR1500M to your factory radio or an 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 AR1500M 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. You will use the Low-pass filter to primarily keep high notes out of your subwoofer(s) SWITCHABLE BASS BOOST: Switchable Bass Boost allows you to boost the low bass +18db. DIMENSIONS: The AR1500M is 10.3 inches in Depth, 6.5 inches in Width and 2.6 inches in Height. It can be installed in a variety of different places due to its slim and compact design WARRANTY: BOSS Audio Systems provides a Powerful 6 Year Platinum Online Dealer Warranty so long as the purchase is made through Amazon Dot Com