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: 5-Channel 1700 Watt High Efficiency Class D Design 2-ohm Stable (4-ohm in Bridged Mode) Channels 1-4 2-ohm Stable Subwoofer Channel 5 PWM MOSFET Power Supply Low Level (RCA) Input Front/Rear/Sub Remote Soft Delay Turn On/Off Circuit Variable High/Low Pass Electronic Crossover Selectable 12dB Bass Boost EQ Variable Subsonic Filter - Channel 5 Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output. Specifications: Peak Power: 1700 watts Power Supply: Unregulated PWM Inputs: RCA, 3 Pairs Input Dimensions (in Inches): 12.8" x 7.1" x 2.0" Depth: 12.8" Channels (mono): 5 4-ohm Power: 65 watts x 4 / 300 watts x 1 4-ohm Mono Power: 200 watts x 2 / 300 watts x 1 2-ohm Power: 100 watts x 4 / 450 watts x 1 1-ohm Mono Power: N/A Height: 2.0" Width: 7.1" Subwoofer EQ Frequency: 45Hz Variable Subwoofer EQ: 0/6/12db Selectable Low-Pass Crossover Freq: Variable 30 Hz - 250 Hz High-Pass Crossover Freq: Variable 50 Hz - 1 kHz Crossover Slope: 12dB Input Sensitivity: 0.25 V - 6.0 V S/N Ratio: >100dB Total Harmonic Distortion: 0.3% @ Rated Power Output Power (14.4 V) @ 4 ohm: 65 watts x 4 / 300 watts x 1 Output Power (14.4 V) @ 2 ohm: 100 watts x 4 / 450 watts x 1 Output Power (14.4 V) @ 1 ohm: N/A Frequency Response: 10 Hz - 50 kHz