Fusion MS-AM402 2-Channel Marine Class AB Amplifier, 400W

Fusion MS-AM402 – 2-channel marine Class AB amplifier, 400 W

The Fusion MS-AM402 is a 2-channel marine audio amplifier with a peak power of 400 W, specially designed for use on watercraft. It belongs to the Fusion Marine product line, engineered to meet marine environment requirements – including resistance to water, salt fog, and UV radiation.

The design based on the classic Class AB amplifier architecture provides dynamic sound, warm midrange, and full control over low frequencies, making the MS-AM402 an excellent choice for powering stereo speakers or a subwoofer in bridged configuration.

Key features:

Amplifier type: Class AB

Number of channels: 2

Peak power: 400 W

RMS power:

2 × 65 W RMS at 4 Ohm

2 × 100 W RMS at 2 Ohm

1 × 200 W RMS at 4 Ohm (bridged mode)

Output impedance: 2 – 4 Ohm

THD distortion: <0.1%

Frequency response: 20 Hz – 20 kHz

Signal-to-noise ratio: >95 dB

Construction and environmental resistance:

Housing: aluminum, corrosion resistant

Protections: thermal, short circuit, overload

Protection rating: no official IP rating – for installation in a dry, ventilated location below deck

Marine environment resistance:

Moisture-protective circuit coating

Compliance with salt fog and UV resistance standards

Connections and controls:

Signal inputs: 2 × RCA (Low-Level)

Active filters:

High-Pass (HPF)

Low-Pass (LPF)

Sensitivity (gain) adjustment: yes

Remote control: via REM wire from radio or audio source

Power supply: 10.5 – 16 V DC

Fuse: 1 × 25 A (internally mounted)

Dimensions and mounting:

Length: 280 mm

Width: 200 mm

Height: 60 mm

Weight: approx. 1.8 kg

Mounting: horizontal, in a dry ventilated place

Applications:

Powering two speakers (stereo)

Powering a subwoofer in bridged mode

Ideal for medium-sized motorboats, yachts, RIBs, and sport boats

Compatibility with Fusion radios, MS-RA70, MS-RA210, MS-BB100, and others

Package contents:

1 × Fusion MS-AM402 amplifier

Complete mounting hardware

User manual

Manufacturer's warranty: 1 year

The Fusion MS-AM402 is an amplifier that combines high power, simple setup, and a solid, durable design. It is an ideal choice for those who need a compact yet powerful amplifier for onboard sound systems. With the ability to operate in stereo or mono mode, it easily adapts to various audio configurations on watercraft.