Fusion Apollo stereos are built on a design philosophy that separates them from standard marine audio equipment. Knowing what that means in practice determines which system belongs on your vessel. But above all else, Fusion's Digital Signal Processing (DSP) uses precisely calculated loudness curves optimized for the human ear to create full-range audio quality at every volume level.
Meanwhile, the feed-forward limiter anticipates audio peaks and adjusts gain before distortion occurs. DSP also applies acoustically designed speaker profiles to optimize and customize sound in each zone. The result is an entertainment system that’s perfectly tuned for high-quality audio reproduction and programmed to protect your system season after season.
The Fusion Marine Stereo Lineup We Carry And Install
Every Fusion stereo we carry addresses a specific vessel size, zone count, and audio performance requirement. We match the right unit to the vessel before any recommendation is made. If you’d like to see every product we have available, feel free to browse our Fusion marine audio overview page.
Fusion Apollo MS-SRX400: Single-Zone For Secondary Positions
As a single-zone Apollo stereo with AM/FM, Bluetooth, Wi-Fi audio streaming, and DSP to optimize sound quality at all levels, the SRX400 features a 2.7-inch LCD color display, a 140-watt peak power Class D amplifier, and PartyBus networking for synchronized audio across the full vessel. Better yet, it can integrate with a Fusion MS-RA770 or MS-RA670 as a zone receiver in a multi-stereo build.
Fusion MS-RA70NSX: Two-Zone With Bluetooth And SiriusXM
As a sleek, value-packaged stereo with two independent audio zones, the MS-RA70NSX comes with AM/FM, Bluetooth connectivity, SiriusXM compatibility (receiver and antenna not included), and NMEA integration. It features a 200-watt peak power Class AB amplifier, an IPX7-rated front panel to withstand harsh environments, an optically bonded LCD for a crystal-clear display, and flush or flat mounting options. It’s best suited for smaller vessels where simplicity, reliability, and weatherproof construction are the primary requirements. Please note that the cover is not included.
Fusion MS-RA210: Two-Zone With DSP And SiriusXM
A two-zone marine stereo with AM/FM, Bluetooth, SiriusXM, and Fusion DSP. Features a 2.7-inch LCD color display, 200-watt peak power Class D amplifier, NMEA 2000 MFD integration, over-the-air software updates via the Fusion-Link app, and flush or flat mounting options. Suited for mid-size vessels where two-zone control and DSP are the primary requirements. Cover not included.
Fusion MS-RA670: Three-Zone Apollo Performance
The Fusion MS-RA670 stereo delivers three independent audio zones with advanced Fusion DSP, PartyBus audio distribution technology, Wi-Fi audio streaming with Apple AirPlay 2, Bluetooth, SiriusXM, Optical Audio input for TV connection in salons and cabins, AM/FM, NMEA 2000 integration, and over-the-air software updates. It features a 2.7-inch LCD color display and a 280-watt peak power Class D amplifier. For pontoon builds where multi-zone audio is a priority, our best marine stereo for pontoon boats collection covers how this unit fits into that application.
Fusion MS-RA770 Touchscreen: Four-Zone Apollo With Touch Display
The Fusion MS-RA770 is the first touchscreen marine stereo with built-in Wi-Fi and AirPlay 2. It features a 4.3-inch capacitive touch glass display, four independent audio zones with DSP, PartyBus networking, SiriusXM, NMEA 2000 integration, and over-the-air software updates. As a system built on Fusion's True-Marine design philosophy, the Apollo RA770 stereo includes an IPX6- and IPX7-rated water-resistant front panel and has been tested to a high level of protection against salt fog, temperature, vibration, and UV. Further, it contains a 280-watt peak power Class D amplifier.
Fusion Apollo MS-WB675: Marine Hideaway Stereo
This is a full-featured Apollo hideaway stereo for installations where a traditional head unit is not visible or accessible at the helm. With a compact 5.1-inch x 5.1-inch x 2.2-inch profile, it mounts seamlessly in concealed compartments, storage lockers, or inside helm consoles. Despite its small size, it’s still able to provide clear, premium audio streaming with Wi-Fi technology, including the convenience of AirPlay 2 from Apple and universal plug-and-play (UPnP). You can also connect your Apollo WB675 stereo via Ethernet to your wireless network router, Garmin MFD, or Apollo Series stereo network, and enjoy Wi-Fi audio streaming and over-the-air software updates. Additionally, it has four separate audio zones that you can control, Bluetooth, Optical Audio, SiriusXM, AM/FM radio, and PartyBus networking. For center console builds where a hidden stereo architecture makes sense, our best marine audio system for center console boats collection covers relevant configurations.
Fusion Apollo MS-RA800: The Flagship Marine Stereo
The MS-RA800 represents an advanced Fusion marine head unit. For vessel owners and captains evaluating marine electronics for yachts, it is the right specification when audio performance is a priority alongside navigation and systems integration.
To be specific, it supports high-resolution lossless audio up to 24-bit at 96 kHz via Wi-Fi with seamless AirPlay streaming, which is a capability many standard marine stereos do not offer. From there, its built-in Class-D amplifier can deliver 4 x 40 watts RMS (all channels driven) with less than 0.1% total harmonic distortion at 4 ohms, producing more than 50% more power output.
Additionally, digital processing runs eight times faster than its predecessor, reducing latency across all connected zones and source inputs. Then, the 4.3-inch edge-to-edge glass touchscreen features an 800x400 resolution optically bonded display with improved color saturation and daylight readability over prior generations. Finally, you can take advantage of a wide variety of source options, including Bluetooth connectivity, HDMI ARC, a DAB+ radio tuner, USB connections, AM/FM radio, and AUX inputs. However, please note that the MS-RA800 does not support SiriusXM.
How We Install Fusion Marine Stereo Systems
A Fusion marine stereo delivers its full capability only when the installation matches the same standard as the hardware.
- Zone Mapping Before Installation: We map every seating area, helm position, and speaker location before specifying a head unit. Zone count determines which Fusion model is right before any other feature is evaluated. Incorrect zone planning creates audio gaps that no software configuration will correct after installation.
- Marine-Grade Wiring Throughout: Every installation uses marine-grade tinned copper wiring with sealed terminations at every connection. Corrosion at speaker terminals is the most common cause of early marine audio failure, and the most preventable when the installation is done correctly from the start.
- Professional Installation Advantages: When you purchase equipment through us, 10% of your online equipment purchase price is applied toward professional installation by our certified technicians in Fort Lauderdale. For a comprehensive overview of what our installation services cover, visit our marine electronics installation services page.
At Concord Marine Electronics, we handle the full Fusion installation from zone mapping through on-water testing. Every system is tested at operating speed before the vessel is returned, confirming all zones, sources, and DSP performance under real conditions.
