How to fix your dead MSP subwoofer

TooleBox

Member
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2003.5 Titanium Gray MSP
OK... thanks to a tip from y0sky, we were able to put together this little how-to today.

Do you think your stock sub is blown? did it just stop working? it IS NOT BLOWN! and can be fixed very easily.

I will list my own mistakes so that you do not make the same ones!

Tools needed:

13mm Socket
10mm Socket
Philips head screwdriver
flat head screwdriver


First, start by disconnecting your battery
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Now, you do NOT have to remove the sub box to do this fix, but it does make things much easier on your back!

To remove the box, you will take out the 4 bolts (2 on each side), as well as the 4 screws holding the amp in place. you will also need to disconnect the RCA cables from the amp as well as the power supply to from the amp to the subs.

The box itself DOES NOT need to be opened... so do not waste your time taking out all of the screws!

After the amp is disconnected, just lay it off to the side and the box will slip outwards towards the rear of the car.

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Once the box is removed, you will need to remove the speaker grill.

Now be careful... the grill is plastic and tears EASILY as we found out.

You will notice a rubber grommet around the lip of the grill. you will want to wedge a small flathead screwdriver between the box and the rubber grommet and pry upwards. Be careful or YOU WILL puncture your grill.

We learned the above the hard way. we wound up shoving the screw driver through the grill at each screw, unbolting the sub then turning the box upside-down and letting it drop out and take the grill with it!

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Here is the problem. Kenwood used cheap, weak connectors to put power to the sub. the bass slowly (or in my case quickly) loosens the connectors and shakes them loose killing the sub

Here are the stock connectors:
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We attempted to tighten and re-apply the stock connectors; but they were just too crappy and would not hold tightly!
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After realizing that these connectors just werent going to work, we moved on to replacing the connectors with some nice beefy ones:

beefy connectors
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Cut off the old connectors
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Strip a few mm of wire
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The finished beefy connectors

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the last thing you will want to do is bend the outer terminals inward. in this pic you see the power cables connected and 2 more horizontal terminals. These terminals are actually facing outwards from the factory. We found that the basket the sub sits in is metal... and these extra terminals touch the basket causing unnecessary ground-out of the speaker. bend them inwards to prevent them from touching the basket.
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At this point you are done! just reaffix the sub back into the box, stuff the grill back in, re-mount the box, reconnect the amp, and enjoy your bass again without having to deal with warranty work and an ungodly waiting list for an unnecessary "replacement sub"
 
this loose connection causes the sub to come on and off correct? cus mine DOES sound blown....audible raspy sounds like the cone is loose and vibratin about.....im takin it to the dealer this week...if im put on this several month waiting list im gonna b**** about just given me some cash to get a new 8" sub....can i buy any 8" sub and pop it itno the stock enclosure?
 
AutoBox said:
this loose connection causes the sub to come on and off correct? cus mine DOES sound blown....audible raspy sounds like the cone is loose and vibratin about.....im takin it to the dealer this week...if im put on this several month waiting list im gonna b**** about just given me some cash to get a new 8" sub....can i buy any 8" sub and pop it itno the stock enclosure?

Some 8" subs fit, some don't. Something like Elemental Design's 8" sub will definitely NOT fit...I know JL audio makes an 8" sub that fits in the stock enclosure. Not sure if it was the W0 or the W3.
 
Autobox, yes. You have the infamous "dead sub" issue. That is exactly what mine was doing. Do this fix and you'll be thumpin again in no time without having to deal with the dealership! (unless you want the dealership to do the fix for you... if so, just print this out and bring it to them)
 
Mine sounds really weak and only has half the bass from when I purchased the car a month ago. Could this be the issue, or can a loose RCA connection be causing my issue? I will probably replace the sub regardless with a JL 8" W3v2. The mounting depths are different between the W0 and W3v2 so I will have to double check that detail. The W0 is around 4" and the W3v2 is 4.3".
 
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muohio, you probably have no bass coming from the stock sub... you're most likely just hearing the bass coming from the rear deck speakers...

chances are this fix will work for you as well... it only takes a handfull of minutes to do... so there is really no harm in trying. nothing to lose, bass to gain!
 
TooleBox said:
Autobox, yes. You have the infamous "dead sub" issue. That is exactly what mine was doing. Do this fix and you'll be thumpin again in no time without having to deal with the dealership! (unless you want the dealership to do the fix for you... if so, just print this out and bring it to them)

i got a dealer appointment this thursday...if im put on this damn list then ill give it a try.....when u talk of "beefy" connectors..what brand? i this different ratings for connectors? just wanna make sure i get the right one
 
TooleBox said:
muohio, you probably have no bass coming from the stock sub... you're most likely just hearing the bass coming from the rear deck speakers...

chances are this fix will work for you as well... it only takes a handfull of minutes to do... so there is really no harm in trying. nothing to lose, bass to gain!

I can see the sub reflexing when something is playing. BTW, you replied too quick and I was editing my other post :)
 
Autobox:

the connectors were just nice, stout connectors from home depot. they are also plastic sheathed(sp?) which the stockers were not
 
so were the stock ones not strong enough to hold the sub??? ill pick up some new connectors at radio shack and see what happens.....if it doesnt workout...hell....time for a upgrade
 
TooleBox said:
muohio, you probably have no bass coming from the stock sub... you're most likely just hearing the bass coming from the rear deck speakers...

chances are this fix will work for you as well... it only takes a handfull of minutes to do... so there is really no harm in trying. nothing to lose, bass to gain!

There are no rear deck speaker. Also, most people that have a dead subwoofer have a blown voice coil not loose connections, but nice write up none the less.
 
what are you talking about no rear deck speakers?

i have 2 tweeters, 2 front door, 2 rear door, 2 rear deck, and the sub... (unless the rear deck grills are just ports for the sub?)
 
TooleBox said:
what are you talking about no rear deck speakers?

i have 2 tweeters, 2 front door, 2 rear door, 2 rear deck, and the sub... (unless the rear deck grills are just ports for the sub?)

Just space man. There are no rear deck speakers.
 
ahhh... makes sense... then ignore my prior statement about the rear deck speakers... that was a brainfart.

anyways. to those of you who's sub has "blown" maybe it is the voice coil... but it never hurts to check it out.

adm here has been on a 10+ week waiting list just to have them fix his sub.

In cases like myself and from the sounds of it Autobox as well; it is a case of bad connectors and is a quick fix.
 
Great write up! I will do this also, I luv takin things apart. B4 I start, I need one clarification re: the speaker grill.

I am assuming you pop out the grill with your "safe" screwdriver technique. Once its out, you unscrew a bunch of screws around the sub and it will drop out.

One note on the wire and cheap connectors. Unless it says Kenwood, it may be wire and cheap connectors provided by the company that made the custom enclosure for the MSP. I hear bad things bout' K'wood and I can't say anything bad. I have not had 1 failure of a K'wood product ever.
367 (mspyellow
 
It looks real easy to do. My only question is where are these clips people were talking about breaking on the sub box? I remember when the MSP first came out people were replacing the sub then talking about breaking clips? looks like its all screwed in. Someone enlighten me. :)
 
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