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Old 04-30-2009, 01:38 PM   #1
Lt. JG
 
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Default JBL MR-6 Sound System

Hi - on my recently purchased Maxum 2400 SC3 (2007 registered) I cannot get as much of a crackle or hiss from the radio/CD system. I don't think the first owner had the JBL upgrade, although there is a socket for iPod attachment. The radio screen lights up ok and registers on an FM station but, even at full volume, . . . . . not a peep.

Now I know that the JBL systems are normally very good, and as you can see the boat is not very old. I'm not particularly good with electrics but I can't fin any wire breakage, or any obvious loose connection, or any break in the main 1amp and 10amp fuses at the back of the radio. It does seem like the speakers are just not connected, but wondered if anybody else is aware of a known problem. Sadly I can no longer contact the original owner to see if he was aware of any problem ?

Any comments would be welcomed :?:
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Old 04-30-2009, 01:52 PM   #2
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Default Re: JBL MR-6 Sound System

Welcome to the zoo...I'd try getting a volt/ohm meter and see if there is any pwr getting to the radio...or any pwr coming out of the speakers..which can be a broken wire....just looking at wires and fuses won't tell you much..might also be a bad ground somewhere...

let us know what you find out...

SP :hello:
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Old 04-30-2009, 05:18 PM   #3
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Default Re: JBL MR-6 Sound System

Are these systems externally amplified? If you have lost the remote +ve feed from the head unit to the amp you won't hear anything also if the amp has lost main power or a fuse has blown on the amp itself

If its not externally amplified seems a bit strange to lose all the speakers at once unless of course the amp has blown in the headunit
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Old 05-01-2009, 02:09 AM   #4
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Default Re: JBL MR-6 Sound System

Here is the link for the manual
http://www.prospecelectronics.com/JBL-M ... -11-07.pdf

I have this radio and have not had a problem. First thing to do is find out if the system has an amp or not. The quickest way is to see if the RCA out connectors on the back of the unit are hooked to a cable. If they are find that amp and check to see if it has power and is getting the ON signal from the head unit. After doing some simple troubleshooting call Prospec Electronics for help.

good luck
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Old 05-01-2009, 10:04 PM   #5
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Default Re: JBL MR-6 Sound System

Thanks guys - will have another look at it this long weekend (Monday is a Public Holiday in UK) and then post an update :mrgreen:
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Old 05-05-2009, 06:15 PM   #6
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Default Re: JBL MR-6 Sound System

Investigator,

As a marine audio installer in the UK hopefully I can help you out on this...

First port of call, as some have already mentioned would be to check the connections - Sounds like the unit is powering up fine but I'd not be surprised if an amplifier is present and not turning on, or has been removed by the previous owner. Check fuses on any external ancillaries/aux's that are plugged into the unit.

Also, it is plausible that the speakers have blown, I was working on a Tige Wakeboard boat at the weekend and oddly found that all 4 speakers had been blown - it was only 2 years old and the head unit still worked perfectly! So hook up a multimeter and see if anythings showing at the speakers - If they've blown I'd try and get them changed under Maxum warranty as it'd truly be a poor show to see something like this fail so early.

Also, I know this sounds silly but are there any settings on that could be stopping music? Like a volume limit setting that has mistakingly been turned all the way down? or a mute/ATT mode turned on? Have you tried other sources, like plugging an iPod or USB pen drive in?

If all else fails I'd be happy to come take a look for you but I'd bet it'd be cheaper to find a a car audio shop nearer you to have a quick investigation rather than calling me out once travelling times taken into account. I'd put money on this being a simple fix given the fault being tracked down.

Hope that helps.

Mike
Wakeboard Towers UK
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Old 05-06-2009, 09:55 AM   #7
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Default Re: JBL MR-6 Sound System

Hi Mike - thanks for the input.

I cannot see a separate amplifier and I have wondered whether it was removed by the previous owner :!:

We have checked for the possible mute etc, and have turned volume up fully. I does seem to lock onto FM stations ok but not a peep of sound. Also, when putting in a CD, it looks like it is trying to read it but then just shows "Error" - and this is the same with a number of different CD's. The boatyard where I purchased the boat are supposed to be trying a different head unit this week ?

I'll keep in touch - thanks again
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Old 05-06-2009, 08:16 PM   #8
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Default Re: JBL MR-6 Sound System

I have the same stereo in my hot tub. I went through three of them before I finally got one that works (at least most of the time).

Brit Rider, have you seen many problems with these JBL/ProSpec units?
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Old 05-07-2009, 12:36 PM   #9
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Default Re: JBL MR-6 Sound System

Investigator - no worries, let us know how you get on. I may have mentioned this already but I'll bench test it F.O.C for you if that helps - just get the unit to our office with a cover note (description of problem, name, address, tel number) and mark it for my attention - shouldn't be more than a week; if it works fully and we need to send it back it'll cost you £7.95 to cover our next day delivery service. If its got issues I will make a recommendation as to another unit to purchase that would meet your needs - you can then choose to buy from us or someone else, but I'll do my best to price match anything you find elsewhere

Tglee - I have seen several go dead unfortunately, but no worse than the basic Clarion or Kenwood units... at the end of the day, as much as they tout them as being 'Marine' - They just aren't - coating a circuit board isn't anyhting like enough; especially when it comes to the Casings, sockets and CD mechanisms. This is also compounded when any of them see a bit of salt. Just have a look at the cage the unit sits in and the RCA ports on the back for evidence of this. I've even seen some JBL units with a sticker over the top of the case to keep water out... it was laughable.

The only quality unit I've ever come across is the new Fusion Electronics stuff (Model - IP500) - Fully waterproof (front and back @ IP65 standards) - you just put an ipod inside it and forget about it (it keeps it charged and allows you to scroll through all your tunes from the front panel or remotes). And with nothing to do with quality but everything do to with ease of use - it'll individually control upto 4 'zones' so you can blast music in certain areas (at helm while underway for example) whilst keeping things nice and quiet in cabins/heads/ etc.

I've not had a single Fusion unit go bad... looking over the sales figures we have done 42 in the past 10 months, which by my reckoning is good going for product failure rates, especially when cross-referenced with the amount of Sony, Clarion, Kenwood and JBL I've had to replace over the start of this season. - I'm pretty sure the units are available in the US so it might be worth you scoping one out if you are in the market.
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Old 05-07-2009, 05:18 PM   #10
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Default Re: JBL MR-6 Sound System

I've got the car version of that Fusion head unit (didn't have enough space for the marine one) and I can't fault that either controls the ipod with ease and plays everything but a jam sandwich on CD
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