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MediaMaster® NMEA 2000®  

Volume Controller

Product Description

The MMR-5N2K is a wired remote designed 
to add auxiliary volume control to compatible 
MediaMaster® source units*. Featuring 
certified NMEA 2000® connectivity and 
a water-resistant (IPX7 rated) design, the 
MMR-5N2K connects directly to vessel 
networks using applicable NMEA 2000® 
cables and connectors (sold separately).

*Refer to www.jlaudio.com for compatibility info.

Note:  
-  The MMR-5N2K should only be used with a 

single MediaMaster® source unit, connected 
via a NMEA 2000® network or MMC-PN2K 
powered network cables (sold separately). 

-  Functionality of the MMR-5N2K is solely derived  

from the host MediaMaster® source unit. 

MMR-5N2K

IPX7

WATER

RESISTANT

MMR-5N2K_MAN_040120  •  Printed in Taiwan

2-Year Limited Warranty (U.S.A.) 

Visit www.jlaudio.com for warranty details. 

For Service Information in the U.S.A.  

please call JL Audio customer service:  

(954) 443-1100 during normal business hours (Eastern Time) 

JL Audio, Inc • 10369 N Commerce Parkway, Miramar, FL 33025 

International Warranties:  

Products purchased outside the United States 

of America are covered only by that country’s 

distributor and not by JL Audio, Inc.

Volume Adjustments

The MMR-5N2K is designed to detect and 
control the volume functionality of the host 
source unit, with the following commands.  

Command

Function

Note

Rotate  

Volume  

Knob  

Clockwise

Increase 

Source  

Unit Volume

•  Level control mode of 

each audio zone must  

be set to Relative  

or Variable.

•  All zones will adjust  

simultaneously.

Rotate Volume 

Knob Counter-

Clockwise

Decrease 

Source Unit 

Volume

Press Volume  

Knob Once

Mute/

Unmute 

Audio

When muted, the  

status LED ring  

will pulse slowly.

LED Status Reporting

A white LED ring located behind the volume 
knob displays status and mode of the 
MMR-5N2K. Refer to the table below for the 
meaning of each behavior.

LED Ring  

Behavior

Status/Mode

ON

On; Compatible audio source detected.

Two Flashes, 

Pause, Repeat 

(30 seconds  

after booting)

On; No compatible audio  

source detected.

Slow Pulsing

Source unit volume is muted.

Adjusting LED Ring Brightness

Follow these steps to adjust and set the intensity 
of the LED ring:
1.  To enter program mode, press and hold 

the Volume Knob of the MMR-5N2K for 3 
seconds, until the LED ring flashes 3 times.

2.   Rotate 

the Volume Knob to adjust the LED 

ring’s brightness to the desired intensity.

Command

Function

Rotate Volume  

Knob Clockwise

Increase LED Ring Brightness

Rotate Volume  

Knob Counter-Clockwise

Decrease LED Ring Brightness

3.  To save the LED setting and exit program 

mode, press the Volume Knob once (

LED ring 

will flash 3 times). Program mode will also 
exit automatically after 15 seconds  
of inactivity.

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