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
The Fusion Apollo MS-RA770 is the better marine stereo overall, rated 4.5 to 4.1. The Fusion Apollo MS-RA770 leads on zones, display and pre-amp outputs. The Fusion Apollo MS-RA670 costs $194.80 less ($549.99 vs $744.79).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Fusion Apollo MS-RA670
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.
Amazon $549.99$549.99
Which should you buy?
- Choose the Fusion Apollo MS-RA770 for zones (4 zones vs 3 zones), display (4.3 in color touchscreen vs 2.7 in color) and pre-amp outputs (8 RCA output sets vs 6 RCA output sets).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every dash and panel marine stereo; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fusion Apollo MS-RA770 | Fusion Apollo MS-RA670 |
|---|---|---|
| Overall rating | 4.5/5 | 4.1/5 |
| Amplifier power 20% | 46 26 W RMS x 4 at 4 ohm | 46 26 W RMS x 4 at 4 ohm |
| Zones 15% | 100 4 zones | 67 3 zones |
| Pre-amp outputs 10% | 100 8 RCA output sets | 71 6 RCA output sets |
| Features 25% | 85 NMEA 2000, SiriusXM-ready, phone app, Wi-Fi or AirPlay 2, Bluetooth, USB playback | 85 NMEA 2000, SiriusXM-ready, phone app, Wi-Fi or AirPlay 2, Bluetooth, USB playback |
| Water rating 10% | 100 IPX6/IPX7 front | 100 IPX6/IPX7 front |
| Display 10% | 100 4.3 in color touchscreen | 58 2.7 in color |
| Warranty 10% | 100 3-year warranty | 100 3-year warranty |
Specifications
| Fusion Apollo MS-RA770 | Fusion Apollo MS-RA670 | |
|---|---|---|
| Audio | ||
| Amplifier power (RMS, 4 ohm) | 26 W x 4 RMS | 26 W x 4 RMS |
| Zones | 4 | 3 |
| RCA output sets | 8 | 6 |
| Sources and control | ||
| Bluetooth | Yes | Yes |
| USB playback | Yes | Yes |
| Phone app | Yes | Yes |
| SiriusXM-ready | Yes | Yes |
| NMEA 2000 | Yes | Yes |
| Wi-Fi or AirPlay 2 | Yes | Yes |
| Weather band | No | No |
| DAB+ | Yes | Yes |
| CD player | No | No |
| Camera input | No | No |
| Build | ||
| Mount | Panel cutout | Panel cutout |
| Front water rating | IPX6/IPX7 | IPX6/IPX7 |
| Display | 4.3 in color touch | 2.7 in color |
| Warranty | 3 years | 3 years |