Is the light and the time suppose to stay on constantly?

Hello Cade, There are 2 links below which should help to answer your question. The 1st will guide you to a user manual. The 2nd is a link to Boss Support https://bossaudio.com/product/mgr300b/ https://support.bossaudio.com/hc/en-us

Can i just hook it up to my amp, instead of using the head unit outputs?

Hello Tanner, Yes, you can use the pre-amp outputs to connect to your amplifier. Please see the link below for more information. https://bossaudio.com/product/mgr300b/

Besides the volume knob, what’s the difference between this and the boss 350b? There are no reviews anywhere

Hi Dedmon9 The 350b has an RDS Tuner, where the 300b doesn't. ("RDS" stands for "Radio Data System" and it allows FM broadcasters to send far more than just an analog audio signal out over the air waves. Using a 57 kHz "subcarrier," stations can transmit digital RDS data for reception by RDS-equipped FM tuners).

MGR300B Marine Boat Stereo Gauge Receiver - Bluetooth, No CD DVD Player, AM/FM Radio, IPX5 Weatherproof, USB, MP3

Product ID: 646970087

Details

Brand
BOSS Audio
Compatible devices
Smartphone PC
Connectivity technology
Auxiliary USB
Controller type
iOS
Special features
USB upgrade

📱Bluetooth wireless streaming

🔊240W peak power output

🌧️IPX5 water & dust resistant

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€ 372.94

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Description

🚤 Elevate your boat’s soundtrack with unstoppable, weatherproof power!

POWERFUL 240 W OUTPUT - Feel the boat vibes with crystal-clear, room-filling sound that commands attention on the water.
IPX 5 WEATHERPROOF DESIGN - Engineered to brave splashes and dust, so your soundtrack never stops, rain or shine.
ILLUMINATED NIGHT CONTROLS - Navigate your tunes with ease after sunset thanks to a sleek backlit panel that’s as stylish as it is functional.
VERSATILE USB AUX INPUTS - Charge devices and access vast music libraries on the go—your ultimate marine audio companion.
SEAMLESS BLUETOOTH CONNECTIVITY - Stream your favorite playlists from Spotify or Pandora effortlessly—ditch the cables, keep the party going.

The BOSS Audio Systems MGR300B is a compact, IPX5-rated marine stereo receiver delivering 240 watts of peak power through 4 channels. It features Bluetooth streaming compatible with Spotify and Pandora, USB and auxiliary inputs for versatile media access, and illuminated controls for easy nighttime use. Designed for durability and performance, it’s the perfect audio upgrade for any boat, backed by a 3-year warranty.

Specifications

ASIN	B09TRZZJSH
Audio Encoding	Windows Media Audio (WMA)
Audio Output Mode	Stereo
Audio Output Type	Bluetooth
Best Sellers Rank	#78,181 in Electronics ( See Top 100 in Electronics ) #86 in Marine Electronics
Brand	BOSS Audio Systems
Built-In Media	Mounting kit, rubber cover, instruction manual
Color	Black
Compatible Devices	Smartphone, Tablet, PC, TV, Game console
Connectivity Technology	Auxiliary, Bluetooth, USB
Connector Type	USB, 3.5 mm jack, CD
Control Method	Remote
Controller Type	iOS
Customer Reviews	4.4 4.4 out of 5 stars (182)
Format	CD
Item Dimensions D x W x H	9.5D x 11.5W x 11.5H centimeters
Item Type Name	BOSS Audio Systems MGR300B Marine Boat Stereo Sound System Head Unit - No CD Player, Bluetooth Audio, IPX5 Rated, USB, MP3, AM/FM Radio Receiver
Item Weight	1.34 Pounds
Manufacturer	BOSS Audio Systems
Model Number	MGR300B
Number of Channels	4
Other Special Features of the Product	USB upgrade
Output Power	60 Watts
Output Wattage	240 Watts
Supported Internet Services	Spotify, Pandora
Surround Sound Channel Configuration	4.0
Total Number of HDMI Ports	4
UPC	791489132534
Unit Count	1 Count
Wattage	240 watts
Wireless Technology	Bluetooth

Reviews

L**S

Muy buen producto; cumple con lo que promete.

28.11.2024

J**S

Sounds great and easy to install! Has been on the boat for 3 years now and still working great!

26.12.2025

A**E

Es práctico para instalar y no necesitamos gran cosa, cumple sus funciones al cien 😃

13.06.2024

F**S

No funciona el radio, trae un corto de fábrica. Y se calienta. Necesito devolverlo para que me lo cambien y no veo opción aquí

15.06.2024

E**.

Installed this in my golf cart. The sound is crist and clear. Works great

30.01.2026

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