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I got a lil tear on the foam under my 12' alpine sub by where the terminals are...how do i patch it up or with wut??

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A flexible adhesive like clear silicone adhesive will work, just don't glop it on too heavy or it will unbalance the weight of the cone and shorten the life of the sub. Dont use an adhesive that dries to a hard state or it will actually tear the foam more. Let me know if that helped:) Thanks

Posted on Jun 17, 2009

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1 Answer

I have a 13w7 and i am wondering if its possible to find the replacement foam around the top of the speaker. mine has a tear in it and i find it hard to believe that the speaker would be wasted because of...


Hello,
The foam is molded, you can not remold / repair
If it is a small tear you can repair with a bit of rubber cement. Eventuly it will fail and more will tear causing the sub to sound very bad

Sep 27, 2010 | Jl Audio 13W7 Car Subwoofer

1 Answer

Repairing 1/4inch tear in foam around sub


f6e072e.jpg
click the picture for product website

I used this stuff to repair a tear in the rubber surround on a kicker solobaric 10", it has held up for 10 years, seal the front and back if possible and allow to dry/cure completely. good luck :)

Feb 14, 2010 | Car Audio & Video

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I just wired my alpine type 12 4 ohm subwoofer to two ohms by putting the two red runners in the positive terminal and the two black runners to the black terminal and hooked the wires up to the outside...


If you have the Alpine SWR-1222D, that's a dual 2 OHM Sub. So, the way you have it hooked up to the amp ,it's 1 Ohm, and unless your amp can safely operate at 1 OHM, you are better off connecting the voice coils in series so the amp will see 4 OHMS. The link below will show how the connections are made to the amp. Look at example # 1.

http://akamaipix.crutchfield.com/Manuals/500/500SWR1242.PDF

Hope this helps!

Aug 19, 2009 | Alpine SWR-1222D 12" Type-R Series...

1 Answer

Amp works on other subs, not on mine


Hello adeisenroth,

Sounds like the voice coil(s).

First make sure that the braided wiring going from the sub cone to the voice coil(s) have not come loose. Examine the braided wire all the way from the terminal to the cone. If one or more has come loose, it can sometimes be resoldered. Just be careful with the heat.

If all the wiring is intact, you can check the coils with a multimeter. With the sub disconnected, and the meter set to the lowest resistance scale, test across the speaker terminals. Depending on how the coils are wired you should measeure somewhere between 1 and 4 ohms. If you get "0" or no reading at all, one of the coils is open. If you get "infinity", a coil is shorted. Sometimes only one coil is bad and you can still use the sub, wiring it to the remaining coil only. Once you have determined that one set of coils is either open or short, you can remove the jumper and test each coil individually.

You can test most any speaker voice coil with a small battery. The best to use is the 9V type that has terminals right together. Connect a short piece of speaker wire to the sub terminals, and hold the other end of the "+" wire to the positive battery terminal, then quickly touch and remove the negative battery terminal with the "-" wire. The sub cone should move outward, and you should hear a brief thump. If no cone movement, and no thump, the coil is defective. Do not hold DC to a speaker for any period of time though, just touch and remove. And NEVER use a high-current battery, like a car battery for such a test. If the coil is not already bad, high DC current will damage it.

Either short or open, replacing a voice coil is a job for the Rockford-Fosgate professionals.

Apr 18, 2009 | Sony XM-2002GTR Car Audio Amplifier

1 Answer

1 subwoofer stopped working in a box for 2


Hello mccanello55,

You need to remove the subs from the box in order to check the internal box wiring. First, make sure that the wire going from the nonworking sub terminals to the enclosure terminals is OK. Then check the "braided" leads on the back of the terminals going to the speaker cone. If the wiring all looks OK, remove the wires from the sub terminals, and use a multimeter set to the lowest ohm range and check the resistance across the subs terminals. You should read somewhere between 3-4 ohms. If the meter reads infinity (that is no reading at all), then the voice coil is open. If it "pegs" (reads "0"), the coil is shorted.

Either open or shorted means the voice coil is no longer working.

I could not find any replacement parts on Sony's support page, so it's most likely that they don't even repair these. They probably just replace the sub if it's under warranty, and if it's not under warranty, they probably recommend that you buy a new one.

Hope this helps.

Apr 13, 2009 | Sony Xplod (P589) Car Subwoofer

1 Answer

My sub quit working


first off you should have installed an inline fuse block that fuse will pop first an inline fuse is cheap go to a wall=mart it will run you around 10.00 that gets mounted under your hood cut your power cable in half the one part of the cable should be cut 12 inches that will tie into your possitive terminal on your battery after that is all tightened to your battery you will strip about an inch of coating offf of your power wire tie that into the end of your fuse block make sure it is tight than do the same to the other side just measure from there to your mounting spot for your amplifier and tie your power cable into your amplifier use 8 gauge power and ground cable... your problem with your amp is that you burned up a couple capasitors or even a resistor i just fixed an amp that both fuses were smoked just tear your amp apart look under the control board you will see were a sauder joint is cracked those capasitors and resisters are very cheap there made out of ceramic i just got done repairing my friends amp works like a new one.. good luck if you have problems or w you get it fixed email me.. gordo8785@yahoo.com best of luck buddy..

Dec 12, 2008 | Alpine MRP-M350 Car Audio Amplifier

2 Answers

Alpine mrd m500 amp is not pushing my 12 in infinity sub


If you have a dual voice coil sub, make sure that you have the positive and negative terminals connected properly. If you have ONE of the coils wired backwards, it will cause the speaker to produce little or no sound.

Have you set the gains properly?

Are you sure the amplifier is receiving a strong signal from the head unit?

Have you tried it with a different speaker?

Jul 19, 2008 | Alpine MRD-M1000 Car Audio Amplifier

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