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|The Prime R750-1D amplifier offers high efficiency through the implementation of its Class-D circuitry while delivering rich, full bass to any system. This amplifier is optimized for subwoofers with the implementation of an infrasonic filter to keep those ultra-low (inaudible) bass notes from damaging your subwoofer system. Match with a 4-channel stereo amplifier for your mids/highs and you'll have a Rockford Fosgate system that any Car Audio Fanatic will envy. The PRIME R750-1D is an ultra-efficient mono amplifier that can produce 750 Watts into a 1-Ohm load without taxing the electrical system. The frequency response of the R750-1D is optimized exclusively for use with subwoofers. 12dB/octave crossover. Tri-stage protection covers thermal, over-current and short circuits. Remote PLC (Punch Level Control). On-board Punch EQ with +18dB boost 45Hz. RCA pass-thru. 4 Gauge power/ground terminals. Cast aluminum heatsink. Infrasonic filter. RCA pass-thru. Top mounted controls. Number of Channels: 4. Rated Power(RMS Continuous Power): 250 Watts x 1 4-Ohm/500 Watts x 1 2-Ohm/750 Watts x 1 1-Ohm. Total Power(Sum of Rated Power): 750 Watts RMS. Crossover Controls: Low-Pass: Variable 50Hz - 500Hz 12dB/Octave. Tone Controls: 0dB to +18dB 45Hz. Signal Input: Low Level: 1 RCA Pair. Signal Output: Low Level: 1 RCA Pair. Power Input Connector: Block. Power Wire Gauge: 4 AWG. Speaker Output Connector: Block. Speaker Wire Gauge: 12 AWG. Heat Sink Type: Cast aluminum. Cooling: Convection. Remote Controls: Variable 0dB to +12dB 45Hz. Visual Indicators: Power. Protect. Circuit Topology Class: Class-D. Frequency Response: 20Hz to 250Hz +/-1dB. Dimensions (HxWxL): 1.97" x 6.77" x 9.10"(5cm x 17.20cm x 23.10cm).|