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JBL MA4505 1800 Watt 5-channel Marine Audio Boat Amplifier+Amp Wire Kit

MA4505+RMWK4 V2+(2) MRCA25
$688.97 $309.00
(You save $379.97)
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MA4505, MRCA25, RMWK4 V2

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Package Includes:
  • (1) JBL MA4505 1800 Watt 5-channel Marine Audio Amplifier Boat Amp
  • (1) Rockville RMWK4 4 AWG Gauge Waterproof Marine Amplifier/Amp Install Wire Kit
  • (2) Rockville MRCA25 25 Foot Twisted Pair Marine RCA Cable 100% Copper, Split Pin

What's in the Box:

  • Amplifier
  • Stainless steel mounting hardware
  • Rubber inserts
  • (4) High-level input adapters
  • (3) spare fuses
  • (2) stickers
  • Quick start guide

Features of MA4505:

  • JBL Marine amplifiers feature a slim chassis and a small footprint to allow for installation in tight spaces
  • High- and low-level inputs
    Speaker-level and low-level inputs let JBL Marine amps integrate with just about any audio input
  • Selectable Output and Variable Adjustment Crossovers
    JBL Marine amps feature selectable all-, high-, or low-pass crossovers with variable electronic frequency adjustment to allow for fine-tuning multiple system configurations
  • Product Value
    JBL power and performance at an affordable price point
  • Cosmetic Appeal
    Product family look and feel to meet the needs of our JBL customers
  • Conformal-Coated PCB
    JBL Marine amplifiers are engineered to withstand harsh marine conditions, with fully “marinized” circuit boards to ensure flawless power delivery, year after year
  • Variable Crossovers
    Onboard 12dB electronic crossovers, with selectable full-range, high-pass & low-pass switching, provide tuning options for systems of any size
  • Big Dynamic Power
    Output power is perfectly matched to meet the needs for your JBL marine products


  • Max Power: 1800W Peak
  • RMS Power Output @ 2Ω (subwoofer): 500W x 1, <1% THD+N
  • RMS Power Output @ 4Ω (subwoofer): 320W x 1, <1% THD+N
  • RMS Power Output @ 2Ω (full-range): 65W x 4, <1% THD+N
  • RMS Power Output @ 4Ω (full-range): 45W x 4, <1% THD+N
  • RMS Power Output @ 4Ω Bridged (full-range): 130W x 2, <1% THD+N
  • Signal-to-Noise Ratio (sub): >80dB (ref 1W output @ 4Ω)
  • Signal-to-Noise Ratio (full-range): >80dB (ref 1W output @ 4Ω)


Video of RMWK:


  • Rockville RMWK4 4 AWG Gauge Waterproof Marine/Boat Amplifier Wire Installation Kit
  • 20 ’ Translucent, Twisted Pair, High Quality, Tinned-OFC Flexible PVC RCA Cable
  • 18’ 4 Gauge High Current, Low Impedance, Clear Flexible Power Cable with 3’ Black Poly Woven Mesh to better resist chemicals in the battery compartment
  • 18’ 4 Gauge High Current, Low Impedance, Light Blue, Flexible Ground Cable
  • 25’ 16 Gauge 100% Tinned-CCA, White, Non-Transparent Resin PVC, Flat Speaker Cable
  • 25’ Blue Remote Wire
  • (1) Silver Mini-ANL Fuse Holder – Clear Shell and Clear Blue Bottom Bracket with Blue Waterproof Ring
  • (1) 120A Mini-ANL Fuse
  • (1) 80A Mini-ANL Fuse
  • (2) Ring Terminals
  • (2) Spade Terminals
  • (5) Speaker Cable Terminals
  • (1) Washer
  • (10) White Cable Ties

Description of MRCA25:

Rockville marine audio interconnect cables are specifically engineered to withstand the challenges of both salt water and fresh water marine installations. The utilization of tinned OFC copper conductors with polyethylene dielectrics in a twisted-pair arrangement optimizes noise rejection. The small-diameter white PVC jacket is ultra-flexible enabling our cables to be easily routed around bends and through tight spaces. Our exclusive molded connector features a water proof inner cap that is heat shrunk in place over all solder connections thus guaranteeing a completely water proof and corrosion resistant connection. Our locking plug design with split pin technology further insures tight connections that will not vibrate free even during the most extreme boating maneuvers.


  • Rockville MRCA25 RCA Interconnect Cable
  • 25’ Ultra-Flexible PVC Shield
  • Twisted Pair
  • Premium Audiophile Marine RCA Interconnect Cable
  • High Performance Water Proof RCA Plugs
  • Tinned Copper Strands for Sonic Purity
  • Outstanding Noise Rejection, Accuracy, and Frequency Response
  • UPC:
  • 613817017576

Free shipping to the 48 continental USA only. Orders placed by 1:00 EST will ship same day.
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