Marine Amplifiers

An audio system in a boat is essential. Rule #1 – The boat must float. Rule #2 – The audio system needs to be loud! It has to be heard over the engine, at the end of the ski rope and on the beach when lashed together with the other boats over 4th of July Weekend.


Hifonics THOR Marine Amplifiers have all the features for a flexible system design and power to spare. These amps can run everything from a fishing boat to a multi-zone vessel with a cabin system, a wake tower system and a captain's house.


Check out the full line of TMA and start improving the sound of your summer now!

TMA amplifiers incorporate Hifonics Super A/B Class™ full range and Super D-Class™ mono subwoofer amplifier technology.
Similar to the best amplifiers in the Hifonics line up, the SUPER AMPS, THOR marine and powersports amplifiers use powerful and efficient transformers with audiophile grade capacitors and resistors. Electrical components are both through-hole and surface mount pieces that are all secured to double sided military grade glass resin epoxy circuit boards with beefed up copper traces. This ensures high voltage can pass through the circuit with minimal distortion in the signal path.
Nautic Subwoofers
Twin turbo Toroidal power supplies in a Pulse Width Modulated MOSFET design assure that car voltage is maximized from the battery through to the output MOSFET devices.
Nautic Subwoofers
The THOR Marine amplifiers also utilize Rock solid Ultra-Fi™ MOSFET outputs which are selected by the Hifonics engineers to be balanced for superior power output. This keeps the power smooth even during demanding peaks in the music.
THOR Marine amplifiers have built in equalizers to fine tune the system with variable frequency adjustment, level control and bass EQ active at 45hz while in LP/BP operation. The 5 channel and the 6 channel models (TMA-800.5 and TMA1000.6) also feature a bass remote to control the lower frequencies of the system, right at your fingertips.
The THOR Marine five channel and six channel amplifiers include a bass remote to put the bass control at arm’s length. The amplifiers protection condition is indicated by blue illumination for normal operation, and red indicating a short being present and requiring the attention of an installer.
THOR Marine amplifiers also incorporate the following Hifonics technology:
  • Ultra-Fi™ MOSFET - Produces high power with minimal distortion
  • Low Noise Pre Amplifier - Maximum low voltage signal from the source unit comes into the amplifier circuit with minimal distortion
  • Gold-plated RCA inputs - Gold-Plated RCA jacks create best connection and resist corrosion
  • Multi-Mode - 4 channel & bridged mono operation allows flexible installation for amplifiers to run in either two-channel or bridged mono mode
  • Variable Electronic - Electronic crossovers allow for complete control of the sound
  • High Grade Aluminum - Heavy duty non-corrosive aluminum alloy heat-sink allows amplifiers to quickly dissipate heat while producing maximum power
  • 4-Way System Protection Circuitry - Monitor thermal, overload, DC, and speaker short protection with lighted indicators on the amplifier end panel
  • Illuminated Logo - The Hifonics logo illuminates when the amplifier is powered on
Conformal Coating
All Hifonics THOR Marine amplifiers are ABYC & ASTM certified (which define that powersports and marine amplifiers must use conformal coated PC boards to resist corrosion from salt spray and moisture.) Additionally, the PC boards are mounted in a “non-corrosive” aluminum heatsink. All of these engineering efforts make certain that your amplifier is ready for the elements.
Outdoor Living
All THOR Powersports and Marine products (amplifiers, speakers, source units – we mean ALL) have been tested to be protected against the elements. Water, dust, mud, and vibrations are all part of the marine and powersports climate in which these products will be operating. You can be confident that with the TMA amplifiers, your system will be on the water for years!
To build onto your THOR marine amplifiers and design a true power sports system worthy of the GODS, choose from the following categories to complete your system:

TMA-800.5 Amplifier

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TMA-800.5 Amplifier

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Part#: TMA-800.5


Hifonics 800 watt five channel marine amplifier with 5th channel dedicated to subwoofer, bass remote included



Five channel, 800 watt, Hifonics THOR marine amplifier with onboard electronic crossover, bass boost and adjustable input sensitivity. Allows for four channel full-range operation and dedicated subwoofer channel. Bass remote to control 5th channel included.

Category: Marine Amplifiers
SKU: 806576226680
Part #: TMA-800.5

Features & Benefits
  • 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: Five channel Nautic Marine audio amplifier
  • 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 D Class™
    Super A/B Class™ on the four full range channels and Super D Class™ on the 5th channel to the subwoofer. These Hifonics circuits have 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™ and Super D 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
  • Bass Remote Inluded: YES
    Wired Bass Remote allows adjustments to bass frequencies to be made from the control mounted anywhere in the vehicle.
  • Connections Type: Gold-plated
    Power, ground, speaker and RCA corrosion resistant connections prevent rust in the harsh marine environment
  • 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 + Super D-Class
  • Variable Voltage
  • Signal to Noise Ratio
  • Frequency Response
  • Crossover Type
    Electronic 12dB Per Octave
  • Crossover Frequency Range
    CH1 & CH2

    High Pass 50Hz - 4kHz
  • Crossover Frequency Range
    CH3 & CH4

    Hi Pass 250Hz - 4Khz
    Low Pass 40Hz-250Hz
  • Crossover Frequency Range
    CH 5 (TMA-800-5 only)

    Low Pass 30Hz - 150Hz
  • Tone Control
    Bass EQ 0~10dB@45Hz
  • Power @ 1-Ohm
    1 x 500W - 5th Channel Only
  • Power @ 2-Ohms
    4 x 160W + 1 x 600W
  • Power @ 4-Ohms
    4 x 80W + 1 x 300W
  • Total Channels
  • Audio Inputs
  • Audio Outputs
  • Power Terminal 12v/GND
  • Speaker Terminal Wire Gauge
  • Fusing
    MAXI 50 Amps x 2
  • Certifications
    Marine & Powersports
  • Dimensions - Product Only
    15.98 X 8.86 X 2.36 in
    40.6 X 22.5 X 6 cm
  • Weight - Product Only
    10.69 lbs (4.85 kg)
  • Dimensions - In Gift Box
    21.26 X 11.42 X 3.94 in
    54 X 29.0 X 10.0 cm
  • Weight - In Gift Box
    11.13 lbs (5.05 kg)

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