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Black rectangular car amplifier with silver heatsink fins and Skar Audio branding

Skar Audio

Skar Audio RP-4500.1D 4500W RMS 1-ohm monoblock amplifier

SKU CH-CV4Q-0KFDK

Delivers 4,500 watts RMS at 1 ohm with Class D efficiency and four-way protection circuitry

  • Product typeAmplifier Installation Kits
  • 4500 W RMS at 1 ohm for competition-grade bass
  • 7000 W peak power handles extreme musical transients
  • 1-ohm stable Class D topology maximises current delivery
  • Four-way protection circuitry safeguards thermal, voltage, speaker and DC faults
  • Strapped operation yields 9000 W RMS at 2 ohms for larger systems

RP-4500.1D 4500W RMS Monoblock

The Skar Audio RP-4500.1D is a Class D monoblock subwoofer amplifier built for competition-grade car audio systems. It delivers 4500 watts RMS at a 1-ohm load and 7000 watts peak power at 14.4 volts. The design targets serious audiophiles and competitors who demand extreme output from a single amplifier chassis.

Power Limits at 1, 2 and 4 Ohms

RMS output scales with load impedance: 4500 watts at 1 ohm, 2900 watts at 2 ohms and 1600 watts at 4 ohms, all measured at 14.4 volts. Two units can be strapped to produce 9000 watts RMS at a 2-ohm load. The four-way protection circuit monitors thermal, voltage, speaker and DC conditions to shut the amp down before damage occurs.

Installation Notes and Common Issues

Oversized 1/0-gauge power and ground terminals accept heavy cable for maximum current flow. The amp is 1-ohm stable, so wiring must present the correct final impedance to avoid protection triggers. Inadequate charging systems, undersized wire or poor ground points are the usual causes of shutdown or reduced output.

How it compares

Measured against everything we stock in Amp Wiring Kits & Install Parts, at today’s prices. Recalculated every night.

Price $591.99
Pricier than about 99% of the 259 comparable items (median $12.99).

Specifications

Product
Product typeAmplifier Installation Kits

Questions about this item

Which impedance load should I choose to get the highest continuous output from this amplifier?

Wire the subwoofer for a 1-ohm load; the amplifier delivers 4500 watts RMS at 1 ohm, compared with 2900 watts at 2 ohms and 1600 watts at 4 ohms.

What does the 4500-watt RMS rating mean when the amp is installed in my vehicle?

At 14.4 volts the amp will produce 4500 watts of continuous power into a 1-ohm load; actual output varies with your electrical system voltage and the subwoofer's true impedance.

What does the 1-ohm stable Class D rating cap in a real installation?

The 1-ohm stable Class D design lets you run a single 1-ohm load for the full 4500 watts RMS, and two amplifiers can be strapped for 9000 watts RMS at 2 ohms.

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