Question about JBL MR-4 AM / FM / CD 180 Watts Marine Receiver

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DEH P4901B in place of a JBL MR-4 in my boat

I recently bought a DEH P4901B from a buddy for my boat in place of a JBL MR-4. Are the chasis sizes exact to where I won't have to modify the opening or buy a kit? If not, what kit will I need?

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You can make one to fit where you want

Posted on Jun 26, 2009

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1 Answer

I have a JBL MR 15 does this radio have a place in the back to plug in an ipod adapter. I think it is an Aux input RCA Jack The radio is on my boat and not near for me to look at it.


if it has aux input rca's, then go to an electronics or car audio shop and buy a "stereo rca to 3.5mm headphone jack adapter cable" This will then plug into the headphone jack on the ipod.

Jun 13, 2011 | JBL MR-15 CD Player

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Looking for a manual for our Pioneer DEH-P4901B stereo. We bought a car with radio in it but have no manual. Have no idea on how to set the clock.


The best source for Audio Manuals is Ebay

On some Pioneer , the method to set the date+time is to switch it OFF then press the ON button for 10 Seconds and you should see a Menu.

Select the relevant section for date + time

Aug 30, 2009 | Car Audio & Video

1 Answer

JBL MR-17.2 not recognizing Sirius satellite receiver.


I have the exact same issue. I have swapped with two identical MR17.2 radios and swapped out the sirius receiver. No change. I even bought a remote thinking I had to have a remote installed to get it to work...still no diff. Have you ever found a solution?

Jul 13, 2009 | JBL MR-17 Sirius-Ready AM/FM/CD Receiver...

2 Answers

My son and his buddy recently installed an amphlified stereo system on our center console and there is something strange going on that I can't figure out. It is a Clarion stereo with a JBL amp. The boat...


If a boat is anything like a car, the amp's negative post should not be connected to the battery, but to the ground of the boat. In a car, the entire chassis is grounded to the negative terminal, so when you run a line from the positive terminal of the battery to the positive post on the amp, and a line from the negative post on the amp to the chassis it is a complete circuit. I highly recommend placing a fuse on the positive line from the battery to the amp. Wiring this way prevents the amp from blowing up your battery, as well as prevents the battery from blowing your amp. Hope it works.

Jun 25, 2009 | JBL Boating

1 Answer

Won't read the CD's now


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..........

Jun 01, 2009 | JBL MR-4 AM / FM / CD 180 Watts Marine...

1 Answer

JBL MR-4 CD doesn't eject


The unit probably doesn't think there is a CD inside. Possible doing a soft reset will fix this. Do so by powering the unit and putting a ball point or other pointed object into the reset button opening either on the face of the radio or behind the face. A hard reset can be done by disconnecting constant power from the unit for approximately 15 seconds.
If either of these methods fail, then your unit has a bad CD mechanism or more than 1 CD inside the player. In that case, the unit will have to be serviced by an electronics repair or a local stereo shop. This is a Marine radio, and if installed on a boat, this problem is not too uncommon. Moist air can cause damage to the unit as well as the bouncing on the water that boats do.

Aug 11, 2008 | JBL - MR4W Am/Fm with CD Player White

2 Answers

JBL MR 17


i cant get sirius to work at all, there is a new tuner but jumps back to aux wish i would of bought something else

Jul 25, 2008 | JBL - MR4W Am/Fm with CD Player White

1 Answer

No sound


I have a nessin maxima. Im trying to find a car kit for my car

Jul 23, 2008 | Pioneer DEH-1400 CD Player

1 Answer

Pioneer Car Radio #DEH P4901B


This link will take you to the Pioneer page with the link for both the Owner's Manual and the Installation manual of your specific model.

http://www.pioneerelectronics.com/PUSA/Products/CarAudioVideo/Source/CD-Players/DEH-P490IB?tab=D

Clicking on the link will ask you to register (no cost involved) and then you can download or view the manual.

Hope this helps

Dec 18, 2007 | Car Audio & Video

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