Polk 4CH Amplifier

PA Series 4-Channel Class D Car Amplifier
RMS Power Rating:

4 ohms: 125 watts x 4 chan.
2 ohms: 200 watts x 4 chan.
Bridged, 4 ohms: 400 watts x 2 chan.
Fuses: 1 x 35A and 1 x 40A

High-speed MOSFET power supply
Toroidal transformers ensuring plenty of clean, efficient power and a compact size
LED power (green) and protect (red) indicators
Soft Start Turn-on
4/3/2 channel operation
Terminal block adapter for convenient installation
4-Way System Protection circuitry (thermal, DC offset, reverse DC voltage, and short circuit protection)
Heavy duty aluminum alloy heatsink for extreme heat dissipation
Nickel-plated RCA level inputs
Nickel-plated screw terminals
Input sensitivity:

Low level: 200mV-6V

Crossover switch for FULL, HPF, and BPF
Variable high-pass filter (20-4,000 Hz, 12dB/octave)
Variable low-pass filter (50-5,000 Hz, 12dB/octave)
Damping factor: >100
CEA-2006 compliant amplifier
Frequency response: 20-20,000 Hz
Dimensions: 10-13/16"L x 6-3/4"W x 1-3/4"H