Features:•  Built-in Digital Sound Processor•  Front-mounted power meter and back panel adjustable gain•  Volume control limiter protects the woofers•  Low-level and high-level pass-through input/outputs•  Class D technology combines the best qualities of both class A and B amp•  Low distortion with high efficiency•  Includes a variable high-cut filter that routes higher frequencies to main speakers•  Improves the overall sound quality of home theater surround sound systems•  Remote control includedOSD Audio ''s SMP500DSP Class D Subwoofer Amp is designed for use with higher wattage passive subwoofers such as in-wall subs that require external power. This is a highly efficient Class D subwoofer amp that serves up 1000W of power peak and 400W RMS @ 4 ohms for deep, crisp, clean low-frequency sound effects in dedicated home theater systems and media rooms. Compact but powerful, the SMP500DSP includes a built-in Digital Signal Processor, DSP for high performance at low clock frequencies and improves bass response of subs with a variable high-cut filter with a front panel control knob that routes higher frequencies to main speakers. Compatible with new and old-school source equipment includes both signal, low level and speaker, high level pass through input/outputs for greater flexibility. Loaded with high-end features at an affordable price, the SMP500DSP includes front-mounted power meter, auto power on/off and dual 110/220 voltage.You''ll experience deep, rich and crisp bass while watching your favorite movies, especially action and adventure flicks. A big bang for the buck, features include a front-mounted power meter, back panel adjustable gain and volume control limiter to protect the woofers as well as low-level and high-level pass-through input/outputs to cover newer and old school sound systems. Combining the best qualities of both class A and B amp technologies, distortion is low while efficiency is high, and the SMP500DSP Mono Amp also includes a variable high cut filter that routes higher frequencies to main speakers. This allows subs to concentrate on the low-frequency sound effects for which they are designed and keeps low bass away from your surround speakers for much cleaner highs and midrange. Specifications:•  Amplifier Type: Subwoofer•  Amplifier Class: Digital Class D, 93% Efficient•  Channels: 1•  Power Handling: 200W(RMS/ 500W(MAX Per Channel @ 8 Ohm•  Power Handling: 400W(RMS/ 1000W(MAX Per Channel @ 4 Ohm•  Adjustable Low Pass Crossover: 20Hz-250Hz/0.5 Hz Increments•  Selectable Crossover Slopes: 12, 18, 24, 30, 36 or 48 dB•  Impedance: 8 Ohm and 4 Ohm Stable•  Signal to Noise Ratio: 95 dB•  12V Trigger Mode•  Inputs: Speaker, High Level/Signal, Low Level RCA•  Outputs: Speaker, High Level/Signal, low Level RCA•  Variable Crossover: 40Hz-160Hz•  Selectable Phase Points: 0 to 315�•  Mode Select: Sub/LFE, Bypass LPF•  Automatic Source Switching•  DSP, Digital Signal Processing: Yes•  DSP Memory Store: Select and Store up to 3 Memory Banks•  Rack Mountable: Yes, Mounts Included•  Remote Control: Yes•  Dimensions, L x H x D: 17.13" x 2.16" x 11"•  Weight: 8.4 lbs.•  Warranty: 2 Years• Black