20 Most Recent JBL MR-4 AM / FM / CD 180 Watts Marine Receiver Questions & Answers

hit the arrow over or turn the knob one of the two

JBL MR-4 AM / FM... | Answered on Nov 07, 2013

Because of that moisture it may have fired the lighting connection inside the unit, does it produce and sound?

JBL MR-4 AM / FM... | Answered on Mar 21, 2011

Hi the CD drive is going bad thats the reason why its not pulling the CD, you should get the CD drive replace.

JBL MR-4 AM / FM... | Answered on Jul 19, 2010

i took my head unit face apart and got the volume control off, sprayed a little WD40 and it worked like a beauty!

JBL MR-4 AM / FM... | Answered on Jul 18, 2010

you can make one to fit where you want

JBL MR-4 AM / FM... | Answered on Jun 26, 2009

have you ever cleaned the lazer lens? goto any CD store and pick up a CD cleaner CD, it is a CD that you place a drop of cleaner on the brushes on the bottom of place it in the CD player and let it play, it will clean the lens that reads the cd, you might have to run it a few times if you have never done this before. that should fix the problem. the CD cleaners are not that expansive, can find them under $20...... hope this helps you..........

JBL MR-4 AM / FM... | Answered on Jun 01, 2009

yes you can hook up your mp3 to an aux input on a stereo not sure what you mean by converter typically it is done through a 3.5mm - 3.5mm standard audio cable. and in order to do this your reciever must have an aux input of course and if so then you can toggle the mode of input by pressing the Mode or button that switches from radio to cd etc or consult with your users manual to find out how to switch and if aux input method is supported

JBL MR-4 AM / FM... | Answered on Feb 18, 2009

contact your installer of the spa they will determine what needs to be done as I dont have enough info to assit you

JBL MR-4 AM / FM... | Answered on Apr 02, 2006

No user serviceable parts! If not working just replace!

JBL Car Audio &... | Answered on May 14, 2020

Not finding what you are looking for?
Car Audio & Video Logo

16 questions posted

Ask a Question

Usually answered in minutes!

Top JBL Car Audio & Video Experts


Level 3 Expert

85239 Answers


Level 3 Expert

5531 Answers

ray gallant

Level 3 Expert

69153 Answers

Are you a JBL Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

JBL Car Audio & Video

  • JBL Car Audio & Video

Most Popular Question

volume dial decreases volume turned

  • Car Audio & Video