Borrowing from Powerbass's former ACS series, these new amplifiers offer upgraded features, terminals and a dual layer PCB all packed in the most compact chassis allowable. To accomplish this they selected SMD parts and engineered a brand new high density heat sink engineered for maximum efficiency and cooling. The result, an all new line-up of two, four, five and mono channel models that offer amazing performance and fantastic value. Ultra efficient, the PB Series amplifiers produce plenty of low distortion high fidelity audio in a footprint small enough to fit nicely in nearly any vehicle. The PB Series Amplifiers provide the perfect mix of performance and style in a sleek new compact chassis. Features: 500 Watt High Efficiency Class D Design 1-OHM Stable Mono Block Amplifier MOSFET Power Supply High Level (Speaker)/Low Level (RCA) Input Remote Soft Delay Turn On/Off Circuit Variable Low Pass Electronic Crossover Selectable 12dB Bass Boost EQ Remote Level Control Port (for optional PB-GAIN1 controller) Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output. Specifications: Peak Power: 1000 watts Subwoofer Frequency Range: 10 Hz - 250 Hz Power Supply: Unregulated PWM Inputs: RCA, 1 Pair Input, 1 Pair Speaker Level Input Dimensions (in Inches): 9.7" x 7.1" x 2.0" Depth: 9.7" Channels (mono): 1 Variable Subsonic Freq: Variable 15 Hz - 50 Hz Equalization Boost/Cut: Switchable 0/12 dB @ 45Hz Height: 2.0" Width: 7.1" Switchable Subwoofer EQ: 0 / +12 dB @ 45 Hz Subwoofer EQ Frequency: 45 Hz Variable Subwoofer EQ: Switchable 0/+12 dB Low-Pass Crossover Freq: Variable 30 Hz - 250 Hz Crossover Slope: 12 dB Input Sensitivity: 0.25 - 6.0 Volts S/N Ratio: >90 dB Total Harmonic Distortion: 0.5% at Rated Power Strapped Output Power @ 2ohms: N/A Output Power (14.4 V) @ 4 ohm: 200 watt x 1 Output Power (14.4 V) @ 2 ohm: 300 watt x 1 Output Power (14.4 V) @ 1 ohm: 500 watt x 1 Frequency Response: 10 Hz - 250 Hz