Rockford Fosgate PMX-1
#5 in Gauge-holeFull review
A well-built gauge-hole receiver for a small boat or powersports rig. Its rated power is among the best of the gauge units here.
Amazon $329.99$329.99
25 W x 4 RMS1Gauge hole
2.6/5
A full-featured gauge-hole stereo for a small boat or powersports dash. Spend more on the eXcelon KMR-XM500 only if you want its 5 V pre-outs and longer warranty.
- 19 W x 4 RMSPower
- 1Zones
- IP66Water rating
- 2.7 in colorDisplay
Check price at Amazon$299
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Fits a 3 in gauge hole, so it suits small consoles, golf carts and side-by-sides
- Color screen, SiriusXM-ready and a NOAA weather band
- Rear camera input for docking
- Three sets of pre-outs for adding amplifiers
Cons
- 19 W RMS per channel is modest
- 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-M300BT |
|---|---|
| Audio | |
| Amplifier power (RMS, 4 ohm) | 19 W x 4 RMS |
| Zones | 1 |
| RCA output sets | 3 at 2 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 | 1 year |
Alternatives in this mount
BOSS Audio MGR350B
#6 in Gauge-holeFull review
A step up from the MGR300B for a gauge-hole install, with better water resistance, a weather band and a subwoofer output.
Amazon $178.94$178.94
1Gauge hole
Wet Sounds WS-MC-RND
#8 in Gauge-holeFull review
An inexpensive gauge-hole Bluetooth receiver for a golf cart, UTV or small boat, with room to add an amplifier.
Amazon $164.99$164.99
2Gauge hole
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