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Skar Audio

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

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Availability: Only 4 left in stock, order soon!
Fulfilled by SKAR AUDIO
Arrives Dec 25 – Dec 27
Order within 16 hours and 28 minutes
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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: 1


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: 1


Output Power: 4500 Watts


Specification Met: [Inferred Fcc, Possibly Others]


Material: Semiconductor


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: Dec 25 – Dec 27

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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Top Amazon Reviews

    • Great product. Cost effective.
Size: 1200 Watt Class D Monoblock
The Skar Audio SP 1200 Amp is an exceptional product that delivers impressive power and performance. Right out of the box, it’s clear that the build quality is top-notch, with solid construction and a sleek design that looks great in any audio setup. In terms of performance, this amplifier packs a punch. It effortlessly drives subwoofers, providing deep, clean bass without distortion, even at higher volumes. The power output is more than enough to satisfy the demands of most systems, whether you're looking for a solid daily driver or something that can handle intense bass-heavy tracks. Installation is straightforward, and the amp has all the necessary controls to fine-tune your sound to perfection. The thermal protection and short circuit protection features offer peace of mind, ensuring your equipment stays safe during long listening sessions. Overall, if you're looking for a reliable, high-performance amplifier at a competitive price, the Skar Audio SP 1200 is an excellent choice. It’s a solid upgrade for anyone serious about their car audio system, delivering great sound without breaking the bank. ... show more
Reviewed in the United States on January 26, 2025 by Ashley S.
    • Game changer
Size: 1200 Watt Class D Monoblock
Awesome amp. Big bang for the money. I saw other reviews that said this amp gets hot and I think it's something they're doing, mine doesn't even get warm
Reviewed in the United States on November 6, 2025 by Curtis rohr
    • Skar Audio RP-1200.1D Review: Bringing My System to Life
Size: 1200 Watt Class D Monoblock
I recently upgraded my car audio setup with the Skar Audio RP-1200.1D Monoblock Class D MOSFET Amplifier, and let me tell you—this amp is a game changer. I paired it with two Sony Xplod 1200W subwoofers that have been in my family for years, and somehow, in 2025, they’re still hitting like they just came out of the box. This amp truly unlocked their full potential, delivering clean, hard-hitting bass that shakes the trunk in the best way possible. The RP-1200.1D doesn’t just claim power—it delivers it. From deep, rumbling lows to tight, punchy kicks, the output is consistently powerful and distortion-free, even when pushed hard. And for the price? It’s an absolute steal. You’re getting serious wattage and reliability without breaking the bank. Beyond just bass, I also have two JBL Concert Series speakers in my front doors, and the clarity is breathtaking. Whether it's crisp highs, smooth mids, or deep lows, my system now has a perfect balance between power and precision. The combination of Skar’s raw power and JBL’s crystal-clear detail has completely transformed my listening experience. If you’re looking for an amp that delivers serious power without draining your wallet, the Skar Audio RP-1200.1D is an easy recommendation. It’s proof that you don’t need to spend a fortune to get rich, room-filling sound that makes every drive an experience. ... show more
Reviewed in the United States on March 20, 2025 by Alejandro Nunez
    • Excellent product
Size: 1200 Watt Class D Monoblock
Excellent product works great and you can’t beat the price i recommend it to anyone
Reviewed in the United States on October 19, 2025 by JesseRivera
    • Throws hard punches but is NOT GOOD for LOW HZ
Size: 1200 Watt Class D Monoblock
EDIT: I gave this one more star due to the fact this amp does work well and does last. Its a good build quality I did not expect from SKAR. I have used it every day (almost) for the past 9 months, often at near full volume with everything vibrating and flexing, paired with ONE Sundown SA-12. I still stand behind my statement about this not producing very low Hz like I was used to with my old class A/B amp, and it is absolutely noticeable on certain songs. I have done many low Hz tests and this amp just does not hit certain ones. It does get extremely loud though and hits well. That being said, its still a great amp and was built to last under above average consistent usage. I purchased this amp to replace my vintage KOLE Audio amp and wired it to one Sundown SA-12. The SKAR 1200 has very "punchy" bass but does not get very low. My old KOLE amp that had half the power of this hit lows soo good and you could feel the low bass. With this SKAR you do not get that at all, I am very disappointed. For that reason I may be returning this. The only difference I can see is the old KOLE is a CLASS A/B and this SKAR is a CLASS D. Not sure if that has anything to do with my loss of lows but it should not. I have everything tuned correctly and it still misses the low HZ. Back to square 1 now. Any suggestions? All in all this is a decent amp that has power, but if you want something that gets low and has clarity keep looking! ... show more
Reviewed in the United States on June 12, 2019 by KoolCat
    • Skar Amp Works Great
Size: 2000 Watt Class D Monoblock
Works very well. Puts out alot of wattage. Would def buy again
Reviewed in the United States on October 14, 2025 by Shelby D
    • Wangin son
Size: 1200 Watt Class D Monoblock
Review Image by Brandon Russell Brandon Russell
OOOHHHHH WEEEEE, the absolutely flawlessly beautiful sounds she produces… yep yep it’s the perfect amp for one or 2 or 4 subs.
Reviewed in the United States on October 15, 2025 by Brandon Russell Brandon Russell
    • Great for your money
Size: 2000 Watt Class D Monoblock
It's exactly as described and doesn''t ask for much from the competition. It's not as expensive as the other brands. I Will deffinately keep on buying from Skar Audio!
Reviewed in the United States on October 25, 2025 by Marcos S.

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