Fusion Apollo MS-SRX400
A zone stereo for a second listening area on a boat that already has an Apollo RA670, RA770 or RA800. As the only stereo on board it gives up too much.
Amazon $399.99$399.99
The Fusion Apollo MS-SRX400 is the better marine stereo overall, rated 3.1 to 2.6. The Fusion Apollo MS-SRX400 leads on warranty, display and water rating. The Clarion CMM-20 wins on zones. The Clarion CMM-20 costs $193.22 less ($206.77 vs $399.99).
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.
Clarion CMM-20
#13 in Dash and panelFull review
A solid two-zone stereo around $200 for a boat that powers its speakers from the head unit. Step up to the CMM-30 for color, SiriusXM and NMEA 2000.
Amazon $206.77$206.77
Which should you buy?
- Choose the Fusion Apollo MS-SRX400 for warranty (3-year warranty vs 1-year warranty), display (2.7 in color vs 2.4 in monochrome) and water rating (IPX7 front vs IP66 front).
- Choose the Clarion CMM-20 for zones (2 zones vs single zone).
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-SRX400 | Clarion CMM-20 |
|---|---|---|
| Overall rating | 3.1/5 | 2.6/5 |
| Amplifier power 20% | 46 26 W RMS x 2 at 4 ohm | 42 25 W RMS x 4 at 4 ohm |
| Zones 15% | 0 single zone | 33 2 zones |
| Pre-amp outputs 10% | 14 2 RCA output sets | 14 2 RCA output sets |
| Features 25% | 40 phone app, Wi-Fi or AirPlay 2, Bluetooth | 35 weather band, Bluetooth, USB playback |
| Water rating 10% | 100 IPX7 front | 70 IP66 front |
| Display 10% | 58 2.7 in color | 10 2.4 in monochrome |
| Warranty 10% | 100 3-year warranty | 0 1-year warranty |
Specifications
| Fusion Apollo MS-SRX400 | Clarion CMM-20 | |
|---|---|---|
| Audio | ||
| Amplifier power (RMS, 4 ohm) | 26 W x 2 RMS | 25 W x 4 RMS |
| Zones | 1 | 2 |
| RCA output sets | 2 | 2 |
| Sources and control | ||
| Bluetooth | Yes | Yes |
| USB playback | No | Yes |
| Phone app | Yes | No |
| SiriusXM-ready | No | No |
| NMEA 2000 | No | No |
| Wi-Fi or AirPlay 2 | Yes | No |
| Weather band | No | Yes |
| DAB+ | No | No |
| CD player | No | No |
| Camera input | No | No |
| Build | ||
| Mount | Panel cutout | Panel cutout |
| Front water rating | IPX7 | IP66 |
| Display | 2.7 in color | 2.4 in monochrome |
| Warranty | 3 years | 1 year |