RP-4500.1D | 4,500 Watt Monoblock Car Amplifier

  • Skar Audio RP-4500.1D 4,500 Watt Class D Monoblock Car Amplifier - Front View

RP-4500.1D | 4,500 Watt Monoblock Car Amplifier

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Skar Audio engineered the RP-4500.1D Class D monoblock subwoofer amplifier to be dominant in both power and reliability compared to anything else on the market in its' class. Designing the most efficient, well built, high quality amplifiers is where we start here at Skar Audio, and that is exactly what is delivered in the RP-4500.1D. This amplifier is competition grade and for the most serious audiophiles seeking extreme levels of power output.

The RP-4500.1D is 1-ohm stable and utilizes a wide array premium internal components that make it extremely powerful and reliable - such as its high speed MOSFET power supply and advanced PCB board layout. Conservatively rated at 4,500 watts RMS power at a 1-ohm load, with the capabilities of reaching beyond 7,000 watts at max power output. This amplifier is by far one of the most affordable and powerful competition grade monoblocks on the market when priced per watt, and will exceed your expectations when you hear it bring your subwoofers alive.

Furthermore, the oversized 1/0-gauge power and ground terminals found on the amplifier allow for maximum current flow and therefore higher power output and more efficient operation. You'll have full reign over your amplifier with the built-in user control panel, featuring variable adjustment tunings for gain level, bass EQ (0-9 dB), subsonic filter (10-50 Hz), low-pass filter (35-250 Hz), and phase filter (0-180 Degrees).

In addition to all the above features, this model also features 4-way protection circuitry, which will give the user the peace of mind knowing they are protected against damage to the amplifier for various reasons - including electrical shortage, overheating, low voltage, and more. This amplifier comes with a remote subwoofer level control (bass knob) allowing the user to have full control over their bass from the front of the vehicle. Present on the RP-4500.1D as well are both input and output RCA connections, allowing the source signal to be daisy chained between multiple amplifiers. The RP-4500.1D is also strappable, featuring an output master/slave input switch.


Real World Amplifier Dyno Test Results

  • Certified Run - 1 Ohm: 4,313 Watts @ 12.77 volts
  • Uncertified Run - 1 Ohm: 4,448 Watts @ 12.53 volts
  • Dynamic (Burst) Run - 1 Ohm: 6,979 Watts @ 14.55 volts


*Skar Audio always recommends professional installation for all of our products.*


*High power amplifiers producing 1500 watts or more may require additional upgrades to your vehicles stock charging system.*


*Never mount amplifiers directly on the enclosure*



  • Skar Audio RP-4500.1D Monoblock Car Subwoofer Amplifier
  • 1 Ohm Stable Class D Monoblock Subwoofer Amplifier
  • 4 Way Protection Circuitry: Thermal, Voltage, Speaker, DC
  • Peak Power @ 1 Ohm: 7,000 Watts x 1 Channel (14.4v)
  • RMS Power @ 1 Ohm: 4,500 Watts x 1 Channel (14.4v)
  • RMS Power @ 2 Ohms: 2,900 Watts x 1 Channel (14.4v)
  • RMS Power @ 4 Ohms: 1,600 Watts x 1 Channel (14.4v)
  • RMS Strapped Power @ 2 Ohms: 9,000 Watts x 1 Channel (14.4v)
  • High Speed MOSFET Power Supply
  • Soft Turn on Circuit
  • Frequency Response: 20Hz~250Hz
  • Signal to Noise Ratio: 85dB
  • Damping Factor: 200<
  • Low Pass Filter (Variable): 35Hz~250hz
  • Subsonic Filter: 10Hz~50Hz
  • Bass EQ: 0~9dB
  • Remote Bass Knob & Wire Included
  • 1/0 Gauge Power and Ground Terminals
  • Working Voltage: 8.5V-14.4V
  • Fuse Rating: 450 Amp
  • Dimensions: 22.05" (Length) x 8.27" (Width) x 2.44" (Height)

Click Here to Download the Product Manual

Customer Reviews

Based on 15 reviews
4500 watts uuuuuup????

This thing is crazy powerful, I put mine on 3 zvx12s an man oh man I can't hardly breathe when the bass hits! Very very powerful amp making every bit of 4500 watt San then some. My electrical upgrades are 250 amp ault, big 3 an 2 batteries. I also have a rp3500 an it's a beast to lol...Skared 4 life!!!!!!!! Watts uuuuup????

Best Christmas Gift Ever

My son loves the amp and I get to be pleasantly annoyed by his occasional blaring of his radio. Kidding aside, He loves it and it has greatly improved his sound system.


This amp is not 4500 watts at all. There is no reason my 3600 watt kicker amp should not hit harder than this if this was truly a 4500 watt. Then it is the flagship model? Very poor performance. Wouldn't recommend to anyone


RP-4500.1D | 4,500 Watt Monoblock Car Amplifier

Bad a**

I love this amp very consistent and do the job right I have no complaints I love it I'm using it on 4 ddx going to get my second one very soon