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Skar Audio

Skar Audio RP-75.4AB 500 Watt Full-Range Class A/B 4 Channel Car Amplifier

  • Based on 7,780 reviews
Condition: Used - Acceptable
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Availability: In Stock.
Fulfilled by SKAR AUDIO
Arrives Saturday, Jun 27
Order within 3 hours and 10 minutes
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Size: 500 Watt Class A/B Four Channel


Features

  • 500-Watt MOSFET 4-Channel Class A/B Power Car Amplifier
  • RMS Power at 2 Ohms: 125 Watts x 4 Channels
  • RMS Power at 4 Ohms: 75 Watts x 4 Channel
  • User Adjustable Controls: Gain, Variable LPF, HPF, Bass EQ Switch (0, +6, +12 dB)
  • 4 Way Protection Circuitry | Frequency Response: 20 Hz - 20,000 Hz
  • Signal to Noise Ratio: 105 dB

Description

The Skar Audio RP-75.4AB is a powerful, efficient, and highly reliable four channel class a/b full-range car amplifier. Capable of powering an entire aftermarket upgraded speaker system in a vehicle, it packs the power that will allow you to get loud and let your speakers come alive. Featuring a high speed MOSFET power supply, premium grade internal components, as well as 4-way protection circuitry, the amplifier will operate at the highest levels of performance for hours on end safely. With a depth of adjustable user controls such as the gain, lpf, hpf, crossover, and bass eq, this amplifier is extremely versatile and can be used in so many applications. These advanced user controls will allow you to dial your sound in exactly as you want for perfect clarity, whether running active components or speakers with in-line crossover networks. The class A/B circuitry design of this model allows it to amplify your audio signal with maximum clarity and sound excellence, all while being extremely efficient. Features 8 gauge power and ground input terminal connections for maximum current flow.

Item dimensions L x W x H: 19.5 x 7 x 3 inches


Manufacturer: Skar Audio


Maximum Supply Voltage: 12 Volts (DC)


Mounting Type: Surface Mount


Brand: Skar Audio


Maximum Supply Voltage: 12 Volts (DC)


Mounting Type: Surface Mount


Number of Channels: 4


Output Power: 500 Watts


Maximum Output Power: 500 watts


Item Dimensions: 19.5 x 7 x 3 inches


Material Type: Aluminum, steel, plastic


Specification Met: FCC


Manufacturer: Skar Audio


Model: RP-75.4AB


Brand Name: Skar Audio


Warranty Description: 2 year limited warranty


Global Trade Identification Number: 18


UPC: 760999042718


Part Number: RP-75.4AB


Item Type Name: Car Amplifier


Item Weight: 7.4 Pounds


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 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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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great 4 channel for the price. Great 4 channel for the price.
Size: 500 Watt Class A/B Four Channel
Review Image by Raymond Mccloud
Review Image by Raymond Mccloud
Bought this to upgrade my factory amplifier after replacing my radio, has been working great for over a month now with no issues and does not overheat in the slightest bit, even with it in an area with no air flow in the back of my car. Get no unwanted noise in any of the channels and gets my mids and highs as loud as I want them. Have them powering factory mid-bass and tweeters in my front doors and column, and in the rear a set of pro audio from Skar as well. Would recommend for a cheap 4 channel to anyone needing one. ... show more
Reviewed in the United States on April 26, 2024 Reviewed in the United States on April 26, 2024 by Raymond Mccloud
    • I'm impressed with this amp and Skar in general
Size: 500 Watt Class A/B Four Channel
I'm really impressed with Skar, they are the only company that I know about that doesn't lie about their specs. Other companies use really good rose colored glasses for their specs. The model # for the amp I just bought for my stereo is RP-75.4AB, this is the 4 ohm spec. It actually puts out 75 watts RMS at 4 ohms on all four channels without clipping. Now that's only 300 watts total for what they call a 500 watt RMS amp, but they also spec out for 2 ohm load which is 115 watts RMS, 460 watts total. I think this amp is really intended to be used with a 4 ohm load going by the model #. My first encounter with Skar was with my Karaoke system sub amp. It's a RP-1200.1 and it really does put out 1200 watts RMS into a 1 ohm load, just like the spec says. I liked Skar so much that when I started looking for a 4 channel amp to replace my 2 McIntosh MC240s in my stereo, which I wasn't having much luck with, I thought about Skar and searched for Skar amps. I found the RP75.4AB, it's a class AB amp which I like for full bandwidth and it's still 65% efficient. My Macs also run class AB but they are only about 40% efficient plus there's the power used by all filaments which makes the actual efficiency even lower. In other words the Macs are room heaters. I just ran my stereo with the Skar amp for about an hour with good volume and the amp is barely warm. It also sounds really good, I was hoping it would sound as good as the Macs but instead I was surprised it sounded better, it was cleaner at mid and high ranges. The Macs probably need new tubes so that would explain the difference in quality, which is the main reason I bought the Skar amp to begin with, THERE ARE NO REALLY EXPENSIVE VACUUM TUBES TO REPLACE! This would have cost way more then what I paid for my new system using the RP75.4AB. ... show more
Reviewed in the United States on August 16, 2024 by Ed C
    • Must get!
Size: 500 Watt Class A/B Four Channel
Put this in, with Kenwoods... my car is BUMPING! Thanks Skar!
Reviewed in the United States on March 22, 2026 by Heather Joyal
    • Great budget amp Great budget amp
Size: 500 Watt Class A/B Four Channel
Review Image by George Weaver
Great amp for the money. Good sound quality. I have bought more than one of these.
Reviewed in the United States on August 11, 2025 Reviewed in the United States on August 11, 2025 by George Weaver
    • Great amp
Size: 500 Watt Class A/B Four Channel
I replaced the Mach 460 in my Mustang and use this amp to power the speakers and subwoofer. I have had several systems in my past cars and this one works great. It gives more than enough power to the speakers and the sub thumps like crazy. It is capable of more but I keep it to a reasonable level. The many ways you can customize the amp to your prefer is awesome. I would recommend this to anyone on a budget or just looking for a great amp. ... show more
Reviewed in the United States on May 9, 2024 by Ben C.
    • Quality for a budget build
Size: 500 Watt Class A/B Four Channel
I wanted to add an amplifier to my car audio set up and the Skar products come in at a perfect price point for the avid car audio enthusiast. The sound quality on the amp meets my needs. I’ve had plenty of playtime on this amp and it works flawlessly even when cranked up. Can’t beat the quality for the price! Would highly recommend this item. ... show more
Reviewed in the United States on December 28, 2024 by Kevin Theis
    • 🔊 Unleash Pure Sound Power! 🚗🎶
Size: 500 Watt Class A/B Four Channel
The Skar Audio RP-75.4AB Car Amplifier delivers 500 watts of dynamic performance, perfect for powering your full-range speakers with precision. Featuring a Class A/B design, it ensures clean, crisp sound across all four channels, ideal for creating a balanced audio setup. Built for durability and efficiency, this amplifier is the ultimate choice for audiophiles ready to elevate their car audio system to perfection! 🎵⚡ ... show more
Reviewed in the United States on December 5, 2024 by David Houck
    • Awesome products for the price
Size: 500 Watt Class A/B Four Channel
I've a number of skar amps and subs they have all out performed sundown audio for a fraction of the price. I will only buy skar products for now on. I was a Rockford fosgate fan, and all kicker comp series and neither compare to skar
Reviewed in the United States on August 1, 2025 by David W.

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