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Fusion MS-AM504 4-Channel Marine Class AB Amplifier, 500W
€349.95EUR
Product Description
Fusion MS-AM504 – 4-channel marine class AB amplifier, 500 W
Fusion MS-AM504 is a 4-channel marine class AB audio amplifier with a maximum power of 500 W, specially designed for onboard use on watercraft. Its robust construction resistant to marine environmental conditions and high sound quality make it an ideal choice for stereo systems and multi-zone sound systems on yachts, motorboats, and recreational boats.
Key features:
Amplifier type: class AB
Number of channels: 4
Peak power: 500 W
RMS power:
4 × 65 W RMS at 4 Ohm
4 × 100 W RMS at 2 Ohm
2 × 200 W RMS at 4 Ohm (bridged)
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio (SNR): >95 dB
Output impedance: 2–4 Ohm
THD (total harmonic distortion): <0.1%
Marine resistance:
Compliance with standards:
ASTM B117 (salt fog resistance)
ASTM D4329 (UV resistance)
Enclosure: anodized aluminum, corrosion resistant
PCB coating: epoxy, moisture protective
Protections: short circuit, overload, temperature
Mounting location: dry ventilated space (inside hull)
Inputs and control functions:
Signal inputs: RCA (low-level)
Remote control: REM wire
Adjustments:
Gain (signal amplification)
Low-pass filter (LPF)
High-pass filter (HPF)
Operation modes: 4/3/2-channel, e.g. 2 stereo speakers + subwoofer (bridged)
Power supply and protections:
Power supply: 10.5 – 16 V DC
Current consumption: up to 25–40 A (depending on load)
Fuse: 1 × 40 A (external required, not included)
Dimensions and mounting:
Length: 280 mm
Width: 200 mm
Height: 60 mm
Weight: approx. 2.0 kg
Mounting: horizontal, inside the unit (protected ventilated area)
Applications:
Powering 4 stereo speakers in two zones
2-channel configuration + subwoofer
Operation in Fusion systems with head units (RA70, RA210, BB100, Apollo Series)
Installations in recreational boats, sports boats, motor yachts, and RIBs
Package contents:
1 × Fusion MS-AM504 amplifier
Mounting kit
User manual
Manufacturer's warranty: 1 year
Fusion MS-AM504 is a classic, proven marine class AB amplifier that balances sound quality and durability. With four channels and bridged operation capability, it works well in both simple stereo systems and more complex multi-zone setups.









