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 rates 3.1 among dash and panel marine stereos; the Rockford Fosgate PMX-3 rates 2.9 among gauge-hole ones. The Fusion Apollo MS-SRX400 costs $190 less ($399.99 vs $589.99).
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.
Rockford Fosgate PMX-3
#2 in Gauge-holeFull review
The most complete Rockford gauge-hole receiver, for a wake boat or UTV dash with no room for a larger stereo.
Amazon $589.99$589.99
Scores side by side
These two sit in different mount classes (dash and panel and gauge-hole), and each is scored against the reference points for its own class, so a rating says how well each does among its own mount peers. How we rank explains each factor.
| Factor weight | Fusion Apollo MS-SRX400 | Rockford Fosgate PMX-3 |
|---|---|---|
| Overall rating | 3.1/5 | 2.9/5 |
| 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 | 0 single zone |
| Pre-amp outputs 10% | 14 2 RCA output sets | 14 2 RCA output sets at 2 V |
| Features 25% | 40 phone app, Wi-Fi or AirPlay 2, Bluetooth | 50 SiriusXM-ready, weather band, Bluetooth, USB playback |
| Water rating 10% | 100 IPX7 front | 70 IPX6 front |
| Display 10% | 58 2.7 in color | 58 2.7 in color |
| Warranty 10% | 100 3-year warranty | 50 2-year warranty |
Specifications
| Fusion Apollo MS-SRX400 | Rockford Fosgate PMX-3 | |
|---|---|---|
| Audio | ||
| Amplifier power (RMS, 4 ohm) | 26 W x 2 RMS | 25 W x 4 RMS |
| Zones | 1 | 1 |
| RCA output sets | 2 | 2 at 2 V |
| Sources and control | ||
| Bluetooth | Yes | Yes |
| USB playback | No | Yes |
| Phone app | Yes | No |
| SiriusXM-ready | No | Yes |
| 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 | Yes |
| Build | ||
| Mount | Panel cutout | Gauge hole |
| Front water rating | IPX7 | IPX6 |
| Display | 2.7 in color | 2.7 in color |
| Warranty | 3 years | 2 years |