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Black rectangular car amplifier with silver heatsink fins and terminal block

Skar Audio

Skar Audio car electronics accessory

SKU CH-4EHX-SGNP2

Class D monoblock amplifier delivering 1,200 watts RMS at 1 ohm with adjustable bass EQ, subsonic filter and included remote bass knob

  • Adjustable low passRMS Power @ 2 Ohms: 800 W x 1 Channel (14.4v) RMS Power @ 4
  • Adjustable parametric bass EQSoft Turn on Circuit Frequency Response: 20 Hz ~ 250 Hz Sign
  • Power detailsHigh Speed MOSFET Power Supply
  • Rated voltage8.5 V - 14.4 V
  • Product typeAmplifier & Processor Remotes
  • Key features4 Way Protection Circuitry: Thermal, Voltage, Speaker, DC
  • Delivers 1,200 watts RMS at 1 ohm for powerful bass
  • 4-way protection circuitry guards against thermal, voltage, speaker and DC faults
  • Variable low-pass filter from 50 Hz to 220 Hz tailors subwoofer response
  • Remote bass knob included for convenient level control from the driver seat
  • Compact 7.2 lb chassis fits tight installation spaces

Monoblock Subwoofer Amplifier

The Skar Audio RP-1200.1D is a Class D monoblock amplifier built for car audio systems that need strong, reliable bass output. It delivers 1,200 watts RMS at 1 ohm, 800 watts RMS at 2 ohms and 500 watts RMS at 4 ohms, with a peak rating of 1,600 watts at 1 ohm. The unit includes a remote bass knob and wire for convenient level control from the driver position.

Power and Protection Limits

The amplifier operates on a 14.4 volt supply and accepts an input range of 8.5 to 14.4 volts. Its four-way protection circuitry guards against thermal overload, voltage irregularities, speaker faults and DC offset. Frequency response spans 20 to 250 hertz, the variable low-pass filter adjusts from 50 to 220 hertz, and the subsonic filter covers 0 to 50 hertz. Signal-to-noise ratio is rated at 85 dB with a damping factor above 150.

Installation Checks

Verify that your vehicle electrical system can sustain the required current draw at the rated impedance you plan to use. The oversized four-gauge power and ground terminals demand matching cable gauge for safe, efficient operation. Confirm available mounting space for the chassis measuring 11 7/8 inches long, 6 3/16 inches wide and 2 1/4 inches high, and ensure the 7.2 lb weight is supported. This amplifier is not suited for full-range speaker duties or multi-channel configurations.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $207.99
Pricier than about 90% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameSkar Audio
Product typeAmplifier & Processor Remotes
Product colorBlack
Power
Power detailsHigh Speed MOSFET Power Supply
Rated voltage8.5 V - 14.4 V
Size & build
Product weight7.2 lb (3.27 kg)
Size or dimensions11 7/8 in (Length) × 6 3/16 in (Width) × 2 1/4 in (Height)

Questions about this item

Should I wire my subwoofer at 1 ohm, 2 ohms, or 4 ohms for this RP-1200.1D?

The amplifier delivers 1,200 watts RMS at 1 ohm, 800 watts RMS at 2 ohms, and 500 watts RMS at 4 ohms, all measured at 14.4 volts. Choose the impedance that matches your subwoofer's voice-coil configuration and the RMS rating you need.

What does the 1,600-watt peak figure mean for daily listening?

The 1,600-watt number is a peak rating at 1 ohm and 14.4 volts; continuous output is the 1,200-watt RMS rating at the same load. Music with normal dynamic range will run at the RMS level, so size your subwoofer and electrical system for 1,200 watts RMS.

How does the Class D design and 8.5–14.4 V supply range affect real-world output?

Class D topology keeps the unit efficient, and the wide voltage range means it maintains rated power down to 8.5 volts, so output stays consistent even when the vehicle's electrical system dips under heavy bass demand.

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