BOSS Audio MGV550B
#1 in Gauge-holeFull review
A gauge-mount stereo with a big touchscreen and camera input, for a center console or UTV where you want to see a backup camera. The amplifier rating is not published.
Amazon $245$245
1Gauge hole
2.8/5
The step-up version of Kenwood’s gauge-hole stereo, for a system that will run external amplifiers. If the stereo will power the speakers directly, the KMR-M300BT does the same job for less.
- 19 W x 4 RMSPower
- 1Zones
- IP66Water rating
- 2.7 in colorDisplay
Check price at Amazon$349
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 5 V pre-outs give external amplifiers a cleaner, stronger signal
- Fits a 3 in gauge hole
- SiriusXM-ready with a NOAA weather band and camera input
- Two-year eXcelon warranty
Cons
- Same 19 W RMS amplifier as the cheaper KMR-M300BT
- No app control or chartplotter connection
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 | KMR-XM500 |
|---|---|
| Audio | |
| Amplifier power (RMS, 4 ohm) | 19 W x 4 RMS |
| Zones | 1 |
| RCA output sets | 3 at 5 V |
| Sources and control | |
| Bluetooth | Yes |
| USB playback | Yes |
| Phone app | No |
| SiriusXM-ready | Yes |
| NMEA 2000 | No |
| Wi-Fi or AirPlay 2 | No |
| Weather band | Yes |
| DAB+ | No |
| CD player | No |
| Camera input | Yes |
| Build | |
| Mount | Gauge hole |
| Front water rating | IP66 |
| Display | 2.7 in color |
| Warranty | 2 years |
Alternatives in this mount
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
25 W x 4 RMS1Gauge hole
Rockford Fosgate PMX-2
#4 in Gauge-holeFull review
A color-screen version of the PMX-1. The PMX-3 costs a little more and adds SiriusXM and a camera input.
Amazon $549.99$549.99
25 W x 4 RMS1Gauge hole
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