Space Saver If you are tight on space this is a great solution for you The combination of amplifier and subwoofer all into one makes this ideal for spatially challenged vehicles With a slim design there are a few installation optionsPulse Width Modulated PWM simplifies power supplies It controls the output voltage and current precisely by not only removing the output current sensing loss but also eliminating all secondary feedback circuitry Efficiency Increased reliabilityVariable LowPass Filter A lowpass filter is an electronic circuit that removes all the notes below the filters frequency setting You will use the Lowpass filter to primarily keep high notes out of your subwoofersHigh Level Inputs Speaker level inputs are commonly referred to as highlevel inputs It will be used to connect the BASS8 to your factory radio or an aftermarket radio that does not have lowlevel RCA inputsLow Level Inputs Line level inputs also known as RCA inputs or lowlevel inputs use RCA interconnect cables to link the BASS8 with the source unit Most aftermarket radios have multiple pairs of RCA outputs that can connect to multiple amplifiersVariable Bass Boost Variable Bass Boost allows you to adjust the low bass within the boost range to just the way you like itPhase Control Phase control lets you adjust the speaker phase with the amplifier if your speakers or subwoofer are hooked up out of phaseSpecs Dimensions 1220 x 886 x 295 Weight 882 lbs LED status indicator Thermal Short and Overload Protection Circuits High Performance Voice Coil Rubber Surround Aluminum Cone Remote Subwoofer ControlWarranty BOSS Audio Systems provides a Powerful 3 Year Platinum Online Dealer Warranty so long as the purchase is made through Amazoncom We strongly encourage professional installation of this product to ensure proper and safe functionality