How To Set the Gain On Your Car Subwoofer Amplifier: Authorized Polk Dealer! Features: Polk Audio PAD1000.1 Mono 1200 Watt RMS 1-Ohm Car Audio Amplifier Amp PA D1000.1 Super-Efficient Class D Design - Runs much cooler than conventional amps. High-Speed MOSFET Switching - Power supply with outputs stable into 1 Ohm loads. Protection - Thermal, DC offset, reverse polarity and short circuit protection. Variable Low-Pass Filter: 40 Hz - 220 Hz. Variable Subsonic Filter: 20 Hz - 38 Hz. Bass Boost at 0 dB - 12 dB. Bass Boost at 44 Hz. Remote Subwoofer Level Control. Nickel-Plated Wire Terminals & RCA connectors - Ensure maximum signal transfer. Level Control - Adjusts the gain of the channel to match the output voltage from your head unit. Line Level Outputs - Provides a full range signal for easy connection to additional amplifiers. Stainless Steel Hardware - Used throughout won't corrode in humid environments. Specifications: Type: Class D MOSFET Channels: monoblock RMS Continuous Power @ 4 Ohms: 500 W x 1 RMS Continuous Power @ 2 Ohms: 800 W x 1 RMS Continuous Power @ 1 Ohm: 1200 W Distortion at Rated Power: 150 Crossover Filter Slope (dB/octave): 12 dB/octave Sub Sonic Filter Frequency Range: 20 Hz - 38 Hz Low Pass Filter Frequency Range: 40 Hz - 220 Hz Bass Boost Frequency: 44 Hz Bass Boost (dB) Variable (0 dB - 12 dB) Line Level Inputs Line Level Outputs LED Power Indicator LED Protection Indicator Input Sensitivity: 200 mV - 6 V Supply Voltage: 10 V - 16 V Fusing & Power/Type: (3) 40 Amp ATC Power Connections: 4 AWG Ground Connections: 4 AWG Speaker Connections: 12 AWG Height: 1 13/16" (46 mm) Depth: 6 3/4" (171.5 mm) Width: 12 15/16" (328.6 mm) Width w/ Terminal Adaptor: 13 11/16" (347.7 mm) Weight: 6 1/2 lbs (2.95 kg) Advantages of buying from an authorized seller: Best prices - We sell all Polk Audio Products at great prices Full Factory Warranty Lifetime Customer Service by Polk Audio product experts Guaranteed legitimate and authentic merchandise Please note: If you purchase Polk Audio from an unauthorized seller then you are taking a big risk. You will not have any manufacturers warranty, and there is no guarantee that the item is authentic, brand new, or even working.