Fusion Apollo MS-RA800
The flagship pick for a large boat that wants four zones, Wi-Fi streaming and real power from the head unit itself. Skip it if you listen to SiriusXM.
Amazon $999.99$999.99
40 W x 4 RMS4Panel cutout
4.1/5
An Apollo-series stereo in the compact Fusion cutout, for a boat with up to three amplified zones. Buy it over the RA210 for the third zone, the networking and the longer warranty.
- 26 W x 4 RMSPower
- 3Zones
- IPX6/IPX7Water rating
- 2.7 in colorDisplay
Check price at Amazon$549.99
Price checked November 7, 2026. As an Amazon Associate we earn from qualifying purchases.
Part of the Fusion Apollo MS line: See every Fusion Apollo MS generation.
Pros
- Three zones, each with line and subwoofer outputs, for a fully amplified boat
- Joins a Fusion PartyBus network to share sources with other Apollo stereos
- Chartplotter control, SiriusXM and an optical input
- Three-year warranty
Cons
- AirPlay needs an Ethernet cable to a separate router
- Screen is the same 2.7 in size as the cheaper RA210
The Fusion Apollo family
Every Fusion Apollo model we rank, smallest first. Ratings compare each against its own mount.
| Model | Power | Rating | Price |
|---|---|---|---|
| Fusion Apollo MS-SRX400 | 26 W x 2 RMS | 3.1/5 | $399.99 |
| Fusion Apollo MS-RA670 (this one) | 26 W x 4 RMS | 4.1/5 | $549.99 |
| Fusion Apollo MS-RA770 | 26 W x 4 RMS | 4.5/5 | $744.79 |
How it scores
The rating comes from 7 measured or published factors, each scored 0-100 against fixed reference points for its mount. How we rank explains each one.
Specifications
| Model number | MS-RA670 (010-02138-00) |
|---|---|
| Audio | |
| Amplifier power (RMS, 4 ohm) | 26 W x 4 RMS |
| Zones | 3 |
| RCA output sets | 6 |
| Sources and control | |
| Bluetooth | Yes |
| USB playback | Yes |
| Phone app | Yes |
| SiriusXM-ready | Yes |
| NMEA 2000 | Yes |
| Wi-Fi or AirPlay 2 | Yes |
| Weather band | No |
| DAB+ | Yes |
| CD player | No |
| Camera input | No |
| Build | |
| Mount | Panel cutout |
| Front water rating | IPX6/IPX7 |
| Display | 2.7 in color |
| Warranty | 3 years |
Alternatives in this mount
Fusion Apollo MS-RA770
A four-zone touchscreen stereo with built-in Wi-Fi, for larger boats with several amplified areas. The RA800 fits the same hole and is the newer choice.
Amazon $744.79$744.79
26 W x 4 RMS4Panel cutout
Clarion CMM-30
A four-zone stereo with chartplotter control for well under the price of an Apollo. It suits a boat that will add amplifiers zone by zone.
Amazon $427.86$427.86
25 W x 4 RMS4Panel cutout
Compare
Compare the Fusion Apollo MS-RA670 with any other marine stereo →
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