RP-75.4ABM | 500 Watt 4-Channel Marine Amplifier

75 Reviews

Current Price:$189.99
Sale Price:


Skar Audio engineered the RP-75.4ABM marine amplifier to set a new standard in marine grade amplifier performance. This four-channel marine amplifier is 2-ohm stable and utilizes a wide array of premium internal components, such as its high speed MOSFET power supply as well as an advanced marine grade PCB board layout. Conservatively rated at 500 watts RMS power (125 watts x 4 channels), this amplifier will bring the speakers on your boat to life with unrivaled power output and sound clarity.
The RP-75.4ABM is extremely versatile as well with its compact physical design, which allows it to fit in a variety of tight or small locations on your boat. Also present on one side of the amplifier is a built-in user control panel that is fully adjustable - allowing you to dial in your sound exactly how you want it. Featuring adjustable controls for gain, high pass filter, low pass filter, a crossover switch, and more, you'll have full control over your listening experience.
In addition to all the above features, this model also features four-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. Our marine amplifiers feature a special marine coating internally that allow them to withstand the harshest conditions for long lasting use.
Product Info
General Specifications
Multi-channel Marine Amplifier
Fuse Rating
60 Amp
High Speed MOSFET Power Supply
Damping Factor
Amplifier Width
Bass EQ (Boost)
Yes (0‚+6 dB‚+12 dB)
Output Channels
RCA Line Output
Turn-On Circuit
Soft Turn-on Circuit
Working Voltage
8.5V - 16V
Amplifier Height
Amplifier Length
Tri-Mode Capable
Frequency Response
20Hz - 20kHz
Built-in Crossovers
HPF / Full-Range / LPF
RMS Power at 2 Ohms
125 Watts x 4 Channels (14.4v)
RMS Power at 4 Ohms
75 Watts x 4 Channels (14.4v)
Efficiency at 4 Ohms
Protection Built-in?
Yes - 4-Way (Thermal‚Voltage‚Speaker‚DC)
Power & Ground Inputs
8 Gauge
Signal-to-Noise Ratio
105 dB
Low Level Input (Gain)
6V - 0.2mV
Low Pass Filter (Variable)
50Hz - 500Hz
High Pass Filter (Variable)
20Hz - 5kHz
Power & Protection Indicators
Yes - LED Indicators
RMS Power at 4 Ohms (Bridged)
250 Watts x 2 Channels (14.4v)
Remote Bass Knob & Cable Included
Channel 1/2 Crossovers
Low-Pass Filter
50Hz - 500Hz
High-Pass Filter
20Hz - 5kHz
Crossover Multiplier
Crossover Type (Switchable)
High-Pass Filter / Full-Range / Low-Pass Filter
User Manual
User Manual (PDF)
Shipping Image
Returns Image
Money Back Logo
Warranty Image

Customer Reviews


Based on 75 reviews

  • Absolutely Phenomenal!!!
    Reviewed on 10/18/2021 by B.
    Verified Buyer
    Mind boggling just how loud and clear this sound system is!!!!!
  • Love The Amp
    Reviewed on 2/5/2022 by Daniel
    Verified Buyer
    These brand is great I went with the skar 10s in a ported box and wanted to go with all skar so my mids and highs are skar and running a skar 500 4 channel for highs and mids and a
  • Great Amp For The Money!
    Reviewed on 10/15/2021 by Clinton
    Verified Buyer
    This is a bad ass little amp for the money!
  • 2 - Rp75.4 Power My Glide
    Reviewed on 12/14/2020 by Thirty
    Verified Buyer
    Ska7eq 2 - Rp75.4's 2 - Tws-01's 2 - Tx - 1's 2 - Pax 6.5's 2 - Fsx 6.5's 4 - Tx69 6x9's 2008 Harley Davidson ultra classic Amps put out some serious power
  • Awesome Amplifier
    Reviewed on 9/29/2020 by Elena
    Verified Buyer
    Sound is real crisp clear would definitely buy again and will recommend.
  • RP-75.4AB/500 Watt 4channel Marine Amplifier
    Reviewed on 11/30/2018 by William
    Verified Buyer
    Arrived fast! Excellent packaging. Amp looks and feels very sturdy. Haven’t had the chance to power it up yet. Waiting on more Skar products to arrive for a project I am currently
  • These Amps Are Such A Great Value For The Price!
    Reviewed on 12/27/2021 by Nick
    Verified Buyer
    I am more than impressed with this amplifier. I have this amp pushing 2 8" and 2 6.5" Marine speakers and they provide more than enough power. I am just hoping you guys come out wi
  • Power
    Reviewed on 10/14/2021 by Vincent
    Verified Buyer
    Extremely happy with the power and sound this RP-75.4ABM | 500 Watt 4-Channel Marine Amplifier.puts out a great addition to my system for mids and highs
  • Awesome Product
    Reviewed on 3/30/2021 by Kelly
    Verified Buyer
    Absolutely awesome equipment! Running 2 of these pushing 8 6.5 marine skars. Love it
  • Best Speakers Hands Down
    Reviewed on 6/7/2022 by Robert
    Verified Buyer
    Bought six of these amazing speakers and two 12s to put in my boat. Best decision ever!!!
  • Good Product
    Reviewed on 5/23/2022 by kevin
    Verified Buyer
    Fast delivery and just what I needed!!!
  • 5 Star
    Reviewed on 5/13/2022 by Samuel
    Verified Buyer
    Had no problem amp arrived fast and sounds great
  • Awesome Products
    Reviewed on 5/11/2022 by Jarod
    Verified Buyer
    Great products the only thing I wish was there marine amps to be a little smaller. I’m using 1 of the amps on a side by side and it takes up a ton of room.
  • Amazing Amp
    Reviewed on 5/9/2022 by Kenny
    Verified Buyer
    Push’s all my speakers hard!
  • Great Amp
    Reviewed on 4/27/2022 by Brian
    Verified Buyer
    Amp sounds great and right price and would definitely refer a friend
  • Marine Audio
    Reviewed on 3/20/2022 by Paul
    Verified Buyer
    so far impressed with the product havent installed yet, but will be soon.
  • Null
    Reviewed on 3/5/2022 by Raydel
    Verified Buyer
    Super fast shipping, and great power
  • Skar 500 Watt Amp
    Reviewed on 2/11/2022 by John
    Verified Buyer
    Although this amp is the best bang for your buck I believe the control panel could have some revising as the amp is stated to be a marine amp it can’t even take a light mist when w
  • Null
    Reviewed on 11/5/2021 by thomas
    Verified Buyer
    Only had it a few weeks so far seems really good
  • Get on our list!

    * By clicking Sign Up, you agree to receive recurring automated marketing messages, at the phone number provided. Consent is not a condition of purchase. Reply STOP to unsubscribe. Reply HELP to help. Message frequency varies. Msg & data rates may apply. View our Privacy Policy and Term of Service.