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Black rectangular marine amplifier with silver heatsink fins and stainless steel terminals

Skar Audio

Skar Audio RP-800.1DM 800W Monoblock Class D Marine Amplifier

SKU CH-KEG0-8EH5S

Marine-rated Class D monoblock delivers 800 watts RMS at 1 ohm with waterproof circuit coating, stainless hardware, and adjustable bass EQ, subsonic and low-pass filters

  • Product typeAmplifier
  • Marine-grade waterproof coating protects circuitry in wet environments
  • 800 watts RMS at 1 ohm delivers strong bass output
  • 1-ohm stable operation allows flexible subwoofer wiring
  • Built-in bass EQ with 6 dB or 12 dB boost at 45 Hz shapes low frequencies
  • Four-way protection circuitry guards against thermal, voltage, speaker and DC faults

Marine Monoblock Amplifier

The Skar Audio RP-800.1DM is a Class D monoblock subwoofer amplifier built for marine environments. It delivers 800 watts RMS at 1 ohm and includes a waterproof coating on the circuit board plus rust-proof paint on the chassis. Stainless steel hardware resists corrosion. This unit suits boaters who want reliable bass from a single subwoofer.

Sustained Output Behaviour

RMS ratings show 370 watts at 4 ohms, 600 watts at 2 ohms and 800 watts at 1 ohm, giving a clear picture of continuous power across different loads. The frequency response runs from 20 Hz to 250 Hz, and an on-board bass EQ switch adds 6 dB or 12 dB boost at 45 Hz. Four-way protection circuitry guards against thermal, voltage, speaker and DC faults during long listening sessions.

Upgrade Context

This amplifier replaces a lower-powered marine amp that cannot drive a 1-ohm load or lacks full marinisation. The jump is worthwhile when the existing system clips at high volume or shows corrosion on terminals and casing. It is not for installations that require multi-channel output or full-range signal processing for mid and high frequencies.

How it compares

Measured against everything we stock in Home Speakers & Subwoofers, at today’s prices. Recalculated every night.

Price $198.99
Pricier than about 63% of the 1,147 comparable items (median $133.99).

Specifications

Product
Product typeAmplifier

Questions about this item

How much heat does the 800 W RMS output at 1 ohm produce during all-day use?

The highly efficient heatsink design is built for maximum reliability and continuous performance at the rated 800 W RMS into 1 ohm.

What source and wiring must I already have to install this amplifier?

You need RCA pre-amp outputs from the head unit, 4-gauge power and ground cables, a remote turn-on lead and speaker wire for the subwoofer output.

Will the 20 Hz – 250 Hz frequency response and adjustable low-pass filter integrate with my existing full-range speakers?

Yes, the variable low-pass filter and subsonic filter let you match the crossover point to your current speakers while the bass EQ adds 0, 6 or 12 dB at 45 Hz.

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