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Skar Audio

Skar Audio RP-4500.1D Monoblock Class D MOSFET Amplifier with Remote Subwoofer Level Control, 4500W

  • Based on 1,238 reviews
Condition: Used - Acceptable
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Availability: Only 3 left in stock, order soon!
Fulfilled by SKAR AUDIO
Arrives Aug 14 – Aug 16
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Size: 4500 Watt Class D Monoblock


Features

  • Competition Grade Class D MOSFET Monoblock Power Amplifier
  • Peak Power at 1 Ohm: 7, 000 Watts | RMS Power at 1 Ohm: 4, 500 Watts
  • Stable at 1 ohm | Remote Subwoofer Level Control Included
  • Frequency Response: 20Hz - 250Hz, On-board Bass Boost Control 0-9dB
  • Featuring 4-Way Protection Circuitry and 1/0 AWG Power & Ground Input Terminals for Maximum Current Flow

Description

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.

Item dimensions L x W x H: 22.05 x 8.27 x 2.44 inches


Manufacturer: Skar Audio


Mounting Type: Surface Mount


Brand: Skar Audio


Number of Channels: 2


Item dimensions L x W x H: 22.05 x 8.27 x 2.44 inches


Manufacturer: Skar Audio


Mounting Type: Surface Mount


Brand: Skar Audio


Number of Channels: 2


Output Power: 4.5E+3 Watts


Specification Met: [Inferred Fcc, Possibly Others]


Material: Metal


Global Trade Identification Number: 57


UPC: 011922308457


Product Dimensions: 22.05 x 8.27 x 2.44 inches


Item Weight: 20.2 pounds


Item model number: RP-4500.1D


Is Discontinued By Manufacturer: No


Date First Available: December 13, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 14 – Aug 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Great little amp
Size: 350 Watt Class D Monoblock
This thing is a great value. I paired it with a skar svd8 inch subwoofer and it sounds awesome. It performs very well for a small amp and has plenty of power to push the little 8 inch sub. I haven't noticed it getting hot or anything and haven't had any issues with any distortion or it going into protect mode so overall I am super happy with it. It's small and compact and doesn't weigh much at all so that's a plus too. ... show more
Reviewed in the United States on June 14, 2024 by MrDiY614
    • Very reliable for a regular use
Size: 350 Watt Class D Monoblock
I’ve had this Amp installed for at least 4 months. This little thing is powerful and reliable, it’s in my cars trunk and it works even in the worst heat and never go to protect mode ( I haven’t abused it with sustained max volume in this 100° heat though, that wouldn’t be smart). Now I know I can trust Skar Audio. ... show more
Reviewed in the United States on May 24, 2025 by Daniel Jesus Quero Morales
    • I love skar
Size: 1000 Watt Class A/B Four Channel
Review Image by jerome d. jerome d.
My mids and highs are clean loud and crisp
Reviewed in the United States on July 3, 2025 by jerome d. jerome d.
    • Great underrated Amplifier
Size: 4500 Watt Class D Monoblock
Review Image by Tyler Tyler
After using only Sundown products for the last 7 years, it came a time when I wanted to build a budget build and Sundown was not in it. For years i've seen the massive amount of what I will now call 'propaganda' against this company which said it's products were terrible. Not only is that untrue, my experience is 100% the opposite in my limited time with it. The RP-4500 is as powerful as you would expect a 4500w rms amplifier to be, it has lots of power. For an amplifier that does not include an internal fan to keep cool, the beefy heatsink does a wonderful job even in hot sun of keeping the amp within temp on near clipping load for over an hour. Sound quality wise it is no different than the most expensive sundown amplifiers or the least expensive down4sound amplifiers, in my experience. Budget wise it provides one of the best price per watt ratios in the amp market right now. Very happy with this purchase. What I think could make this board better would be to include a clip indicator knob and maybe a cooling fan. A foam gasket around the back panel of the amplifier would be great to reduce vibration induced noise/rattle. Sundown audio amplifiers for example include this gasketing. ... show more
Reviewed in the United States on June 10, 2023 by Tyler Tyler
    • Go the RP series and avoid the LP series.
Size: 1000 Watt Class A/B Four Channel
Review Image by Justin McD. Justin McD.
Review Image by Justin McD. Justin McD.
I like this better than the Skar LP 80.4 that's on my rear channels. This amp is so strong that its gonna probably kill my tweeters from my Massive Audio component setup. So its safe to say that I'm gonna probably get a second RP to replace the LP.
Reviewed in the United States on June 16, 2025 by Justin McD. Justin McD.
    • Crisp highs.
Size: 1000 Watt Class A/B Four Channel
Works great!!’ Very clear.
Reviewed in the United States on July 30, 2025 by Christina Hickson
    • Underrated !
Size: 1000 Watt Class A/B Four Channel
Review Image by ROAD RASH ROAD RASH
Powerfull clean sound ! With (2) battery's. I operate my system with my android smartphone, it works very well. This amp power's (1) 10" sub in a 4th order enclosure on the lows and (4) 6.5"s on the highs. EARPLUGS REQUIRED!!! This amp needs adequate cooling, it has not shut down. Yet ? I recommend this product, be careful, it will shred speaker's ! ... show more
Reviewed in the United States on August 2, 2025 by ROAD RASH ROAD RASH
    • Protection mode immediately
Size: 350 Watt Class D Monoblock
Received a new amp. Hook it up and it goes into protect mode for two seconds, then powers on. But puts out very little power. Contact skar customer service, they run me through tests and all checks out but amp still goes into protect mode. Send the amp in, they send it back with no communication. Same problem. They send me a new amp, same problem. I hooked it up in my other vehicle that's running a Kicker amp for years and the skar goes into protect mode. I ask for a refund on my NEW amp they just sent me and Skar says "sorry, you're out of the 30 day return window". I just got the new amp 2 days ago! Amazon to the rescue! I tell them what's happened and they allowed me to return the amp. ... show more
Reviewed in the United States on November 26, 2024 by Amazon Customer

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