RP-75.4AB | 500 Watt 4-Channel Car Amplifier

  • Skar Audio RP-75.4AB 500 Watt Class AB 4-Channel Car Amplifier - Front View

RP-75.4AB | 500 Watt 4-Channel Car Amplifier



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.


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


*Never mount amplifiers directly on the enclosure*



  • Skar Audio RP-75.4AB Multichannel Amplifier
  • Class AB 4 Channel Amplifier
  • 4 Way Protection Circuitry: Thermal, Voltage, Speaker, DC
  • RMS Power @ 2 Ohm: 125 Watts x 4 Channels (14.4v)
  • RMS Power @ 4 Ohms: 75 Watts x 4 Channels (14.4v)
  • RMS Power @ 4 Ohms (Bridged): 230 Watts x 2 Channels (14.4v)
  • MOSFET Power Supply
  • Soft Turn on Circuit
  • Tri-Mode Capable / Bridgeable
  • Frequency Response: 20Hz~20kHz
  • Signal to Noise Ratio: 105dB
  • Low Pass Filter (Variable): 50Hz~500Hz
  • High Pass Filter (Variable): 20Hz~5kHz
  • 8 Gauge Power and Ground Terminals
  • Working Voltage: 8.5V-14.4V
  • Fuse Rating: 60 Amp
  • Dimensions: 14.75" (Length) x 6.25" (Width) x 2.25" (Height)

Click Here to Download the Product Manual

Customer Reviews

Based on 12 reviews
Well balanced

I have skar components on two channels at 4 ohms, and skar 6x9's and coaxials running in parallel on the other two channels at 2 ohms and this amp pushes them well with no sweat. The sound it very clean. I put bass blockers on the coaxials so the 6×9's could be pushed had. Its perfect. Skar is a decent brand


For 120 bucks it’s pretty strong I’m running sum healthy 6x9s an a pair of 3.5inch tweets on one n it’s sounds great good sound quality I’ve already ordered another only reason I didn’t give five because the rcas I kinda close so to run 2 amps side by side an it’s gets a lil warm not once went into protect mode heat is self inflicted over all great solid Lil 4 channel

skar audio rp 2000.1d

This is by far the best amp I have ever owned I can't wait to get a pair of zvx v2 subs and possibly upgrading to a 3500 watt skar amp

Best brand and amps I’m ever owned

I have Thit amp and I must say it’s amazing it produces amazing power and good rms she’s a beautiy I’m hav already ordered my second one and I’m so ready

I can’t wait

Just ordered this for my mids and his can’t wait to hook it up In my car after readed the reviews gotta say I’m excited