Question about Car Speakers & Subwoofers

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Subwoofer The subwoofer in my car only works on low power when i turn it up it cuts out. This is the secound mtx sub to do this. When i put a new sub in it works just fine. Im wondering if there is a way to fix my old sub cause the seal and connects i can see are still good

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Re: subwoofer

Your overdriving the Subs and burning up the voice coils. Its really not worth fixing. It almost costs the same to fix as to buy a new one. Set you Amp gain down low. Then crank up the volume with a bass test. Slowly crank up the gain until you get some distortion. Then reduce the gain slightly. You will be set then to crank it up to the distortion level and not blow you speakers. Open a can of whoopass on anyne the cranks up on your gain. It will be costing you another set of MTX's.

Posted on Nov 24, 2007

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Is there a option on the chanels that say ''Bridged''? If so, you can hook the subs up in parellel or series to get different ohm loads. Usually the lower ohms, the more power amp puts out. Those subs can handle 225 watts RMS whitch means the power it can handle constantly. If the amp gives more than 225 watts RMs, you could be at risk of blowing the sub. If you could give me the model # of the amp, I can be of more help.

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They probally would, but i just found that sub for 51.00 im sure it would cost that and more to fixed

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I have my l7 solo baric on series mode they sund

Hello rigo11785,

The MTX Thunder 1501D is stable at 1ohm and outputs 1,500 watts RMS into that impedance. An L7 with 2ohm DVC's would present a 1ohm load if wired in parallel and would allow the amp to produce more power than into the 4ohm series load. The problem is that the L7's maximum power handling rating is only 1,000 watts RMS, so if you wire the coils in parallel, you'll very likely overdrive the sub and perhaps damage it. Now, if you bought another L7 and ran the voice coils in series and the subs in parallel, that would be a 2ohm load and well within their power handling capability.

With that amp and sub, I'd recommend leaving the voice coils in series.

Hope this helps.

Jul 28, 2009 | Kicker Solo-Baric L7 S15L72 Car Subwoofer

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I have 4 MTX 10s and a JL 1400D amp and it cuts off if i turn it up to bang it what do i do

How do you have the subs wired and what impedance are they? Your amp is only stable to 2ohms. If they are 4ohm drivers, 2 have to be series & 2 have to be parallel. If their 8ohm drivers, parallel is fine. If your not sure, add a comment to this post with the model numbers on your subs and I will get you the correct info needed to do it right.

Jul 10, 2009 | MTX Thunder 4500 T4510-04 Car Subwoofer

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Subs cut out at low volume no matter the settings

I'm not a complete audio expert but it sounds like somethings over heating or you have a blown out put bridge.

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Wiggle the positive wire to get power and have to unplug subs to turn car off

Ok it sounds to me that your remote wire is not hooked up right casue if you trun your car off then your amp should power down an when you trun your car on it should power up

May 07, 2009 | Car Speakers & Subwoofers

1 Answer

Subwoofers won't work and they are brand new


I've got a pair of these MTX's subs powered from a Fusion 450 watt 2-channel amp. For the price, they are great. By the way, they are 4-ohm.

My first suspicion would be that something in the first incorrect wiring damaged either the amp or the subs. Can you explain specifically what the "installing the subs incorrectly" means? Was the amp output shorted out at any time or was it operated without a load? Either of these conditions will fry an amp and sometimes, the protection circuitry doesn't work either.

First make sure that your amp is still working. Check both the primary power fuse, usually located near the vehicle battery, and the fuses on both sides of the amp. Make sure that when you turn the system on, the power light comes on steady (blinking is protection mode). Test your subs one at a time on a speaker output.

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1 Answer

My subwoofer doesnt work

you mean that the SUBWOOFERS connected to the amp cuts off and come back on randomly?? did you bring the SUBS level to a high volume ? i suggest to check first the value of the speaker (ex. 4 , 8 , 16 ohms ) matches the same value with the amp . second , hows the subs connected , in series ? or parallel . you will need a multimeter for this task .

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