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Discussion Starter #1
As the title states, I don't know much about car audio, but since acquiring my Intrepid, I've wanted to upgrade the audio system. The other day I came across a sub box with two 10" drivers for $7. They said the speakers didn't work; I was skeptical. So far I've got one speaker working, but not the other.

Two questions: 1) is there any way to diagnose the speaker as completely dead vs. simple fix? I have ruled out the wiring, as the one driver that works, works in either side with either wire setup.

2) I don't have an amp, I tested the box at home on a receiver (for about 5-10 seconds at a time to limit damage). What do you recommend for an inexpensive solution to get things running?

The subs are Ultimate brand; TS1000DVC. Looks like 200W RMS, 400W peak, with dual voice coils.

Thanks in advance, I love this site!
 

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1st Gen FTW - It's AutoMedic!
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I would suggest finding some cheap subs if you are wanting to do this on a budget - there really isn't a way to repair those subs that makes any bottom dollar sense. You could completely rebuild them, but honestly, there is no sense in doing that to low end subs like that.

Check out www.mavin.com for some decent stuff on the cheap. You need to pay attention to total impedance, and you don't have to buy dual voice coils - you can get away with single voice coils and just pay attention to the wiring (or re-wire the box). ElecroMavin sometimes has sub amps with built in cross overs, etc.

See what that gets you anyway.

Got pics of the box? Honestly, some of those pre-built box/sub units are really lacking, and in need of help - you may be better off using this box as a design idea, but building it yourself out of better material - or sized to fit your space better.
 

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Discussion Starter #3
Well, one of the subs does work, it's just the other that doesn't. At first neither worked, but the first one just needed it's wires tightened, that's why I was hoping they'd both end up working. Oh well. I don't have a picture at the moment, but it's a pretty basic box; figured I may re-use it if the subs didn't work. I wasn't going out that day to buy anything, just thought I might get lucky. I didn't intend to invest any more money into fixing the sub that doesn't work, if I can't do it that way, no big deal.

I think I'll keep an eye open for a decent priced amp, and give it a shot. If I get a taste, I may end up spending even more money on this car.
 

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1st Gen FTW - It's AutoMedic!
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Replacing just one of a pair of subs with something that isn't a match isn't a good idea...

To fix the dead sub, I'd pull it out of the box and inspect each of the wire leads that go from the terminals to the cone, and make sure nothing broken there. Check the solder joints at the terminals too. If you want to get really ambitious, take a very sharp knife, and cut the DOME (not the cone!) off the center of the sub, about 1/4 inch away from the surface of the cone. Cut almost all the way around, but leave some attached to 'hinge' the dome. Inspect the wiring inside the cone from the leads down to the voice coil. If the coils is deformed, or burnt, it is junk. If you see a broken wire, attempt to repair with solder and gentle heat.

Then hinge the dome back down, and make it kinda overlap, and spread with your finger some white glue to hold it in place. Let it dry good and see if you were successful.

Do you have an ohm meter (DVOM, VOM, Multimeter, etc)?
 

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Get you a 12 or 18volt battery pack from a handtool. Reverse the polarity from the battery pack to the sub and see what happens. If the sub pops out then its good as far as wiring goes, however it might have a blown VC which will negate the sub anyway you wanna look at it. Your best bet would to be just to replace the subs and use the box however you intend.
 
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