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Hifonics TMA-400.4 400 Watt 4-Channel Marine Boat ATV/UTV/RZR Amplifier+Amp Kit

TMA-400.4+RMWK4+(2) MRCA20
$399.96 $114.95
(You save $285.01)

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Items included in this bundle

Package Includes:
  • (1) Rockville RMWK8 8 AWG Gauge Waterproof Marine Amplifier/Amp Install Wire Kit
  • (1) Hifonics TMA-400.4 400 Watt 4-Channel Marine Boat ATV Amplifier Class A/B Amp

About Rockville Quality Control Procedures:

The Rockville brand stands for Quality, Innovation and Value. All Rockville products go through the most rigorous quality control standards in the industry. Products go through months of extensive testing before they reach your hands. All user functions are tested and all internal components are tested for quality. Rockville makes products that are virtually un-breakable! Rockville is one of the only brands in its class to test every concept model for weeks or months before starting production. Once production begins, Rockville sends product engineers to their factory to quality control every line of production. During production every product is tested and on top of that Rockville goes the extra mile and has their high level product engineers do an additional quality control. They test a certain percentage of all products from the production line a second time to ensure that the quality meets their vigorous standards, and to make sure that there is never a batch of products with even a slight problem. All Rockville products are backed with a hassle free warranty.

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Video of RMWK:



  • Rockville RMWK8 8 AWG Gauge Waterproof Marine/Boat Amplifier Wire Installation Kit
  • 25’ Translucent, Twisted Pair, High Quality, Tinned Oxygen Free 100% Copper Flexible PVC RCA Cable
  • 20’ 8 Gauge High Current, Low Impedance, Clear Flexible Power Cable with 3’ Black Poly Woven Mesh to Better Resist Chemicals in the Battery Compartment
  • 4’ 8 Gauge High Current, Low Impedance, Light Blue, Flexible Ground Cable
  • 25’ 16 Gauge Tinned Oxygen Free 100% Copper, White, Non-Transparent Resin PVC, Flat Speaker Cable
  • 20’ Blue Remote Wire
  • 1 Silver Mini-AGU Fuse Holder – Clear Shell and Clear Blue Bottom Bracket with Blue Waterproof Ring
  • 1 50A Mini-AGU Fuse
  • 2 Rust Resistant Ring Terminals
  • 2 Rust Resistant Spade Terminals
  • 5 Rust Resistant Speaker Cable Terminals
  • 1 Rust Resistant Washer
  • 10 White Cable Ties

Owner's manual

Four channel, 400 watt Hifonics THOR Marine amplifier with onboard electronic crossover, bass boost and adjustable input sensitivity. Bridgeable for mono.


  • Hifonics TMA-400.4 400 Watt 4-Channel Marine Boat ATV Amplifier Class A/B
  • Marine Grade Protection: YES - Amplifiers are ABYC & ASTM certified which defines that marine amplifiers must use conformal coated PC boards to resist corrosion from salt spray & moisture.
  • Pre-Amp Circuitry: Low Noise Pre-Amplifier - Maximum low voltage signal from the source unit comes into the amplifier circuit with minimal distortion
  • Inputs: Gold-Plated RCA level inputs - Gold-Plated RCA jacks create best connection and resist corrosion
  • Operation Mode: Four Channel, Full Range, Bridgeable - Flexible installation allows this amplifier to run in four channel or bridged mono mode
  • Crossover / Signal Shaping: Switched FULL / LPF / HPF - Complete control of amplifier signal, essential when using two or more amplifiers
  • Equalizer: Electronic - Control of amplifier output with on board electronic crossover to tailor specific frequencies to speakers and subwoofers. Check specifications for specific frequencies for this amplifier.
  • Class / Topology: Super A/B Class™ -  Super A/B Class™ has been refined over three decades of engineering to deliver the highest level of sound quality and power efficiency. Even at very high listening levels, Hifonics Super A/B Class™ circuitry results in a smooth and linear high end with lower distortion, plus higher current efficiencies and less heat buildup.
  • Output Devices Technology: Ultra-Fi™ MOSFET -  Produces high power with minimal distortion
  • Heat Sink: High Grade Non-Corrosive Aluminum - Heavy duty aluminum alloy heat-sink allows amplifier to quickly dissipate heat while producing maximum power. Non-Corrosive treatment prevents any rust or other corrosion caused by marine use
  • Power Supply: Simpatico Coil Design - The dual coil Pulse Width Modulated power supply keeps voltage constant through the Ultra-Fi output devices
  • Output Connections: RCA outputs - Daisy chain multiple amplifier to eliminate additional signal cables from the source unit
  • Connections Type: Gold-plated - Power, ground, speaker and RCA corrosion resistant connections prevent rust in the harsh marine environment
  • Signal Pass Through: RCA outputs - Daisy chain multiple amplifier to eliminate additional signal cables from the source unit
  • Diagnostics: Three-stage protection circuits - Monitor thermal, overload, DC, and speaker short protection with lighted indicators on the amplifier end panel
  • Marinized / Waterproof: YES - Water resistant for durability in any environment
  • Illumination: YES - Hifonics Logo


  • Class: Super A/B Class
  • Variable Voltage: 0.2V~6.0V
  • Signal to Noise Ratio: >93dB
  • Frequency Response: 10Hz-45kHz
  • Crossover Type: Electronic 12dB Per Octave
  • Crossover Frequency Range CH1 & CH2: Hi Pass 250Hz - 4Khz ; Low Pass 40Hz-250Hz
  • Crossover Frequency Range CH3 & CH4: Hi Pass 250Hz - 4Khz ; Low Pass 40Hz-250Hz
  • Tone Control: Bass EQ 0~9dB@45Hz
  • Power @ 2-Ohms: 4 x 100W
  • Power @ 4-Ohms: 4 x 50W
  • Mono Bridged @ 4-Ohms: 2 x 200W
  • Total Channels: 4
  • Audio Inputs: RCA
  • Audio Outputs: Full Range RCA
  • Power Terminal 12v/GND: 4-GA
  • Speaker Terminal Wire Gauge: 12-GA
  • Fusing: 25 Amps x 2
  • Certifications: Marine & Powersports
  • Dimensions - Product Only: 12.64 X 8.86 X 2.36 inches (32.1 X 22.5 X 6 cm)
  • Weight - Product Only: 8.27 lbs (3.75 kg)
  • Dimensions - In Gift Box: 17.52 X 11.42 X 3.94 inches (44.5 X 29.0 X 10.0 cm)
  • Weight - In Gift Box 8.71 lbs (3.95 kg)
  • UPC:
  • 613815956846

WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov

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