Question about Car Speakers & Subwoofers

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Subwoofer problems I recently purchased a second hand subwoofer in a box. I then bought an amplifier for it, which I was assured had more than enough power. I tried wiring it up to one of my friends sound systems, through which he was running a subwoofer of his own fine, and the "Protect" light on his amplifier came on. No matter which way we wired it, the light came on. The only diagnosis from it was that there was a short circuit. After spending around 4 hours to set up my own amplifier perfectly, I tried it on mine. Still... Problems. My amplifier is (I think, according to the box) a 450-watt JBL mono-block (That's what the sales person told me, though it has 2 channels?). He also mentioned something about RMS after I asked if 450 watts was enough for a 1200 watt subwoofer. I tried wiring the subwoofer to my amp a few ways. I wired it parallel, running one channel to the first voice coil and the other channel to the second voice coil (Both voice coils are next to each other, not on opposite sides). After doing this, regardless of how much I turned the power input up or the level I set the bass to, all I ever got was a slight rumble from the subwoofer. I then bridged the channel and ran them to only one of the voice coils on my subwoofer... And it started smoking. The place I bought the subwoofer from have told me they don't do warranties on them as people keep trying to return ones they've blown up themselves. I'm too afraid to keep trying to get mine working in case I actually do blow it up... Any help would be much appreciated!!! P.S. HELP!

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Re: Subwoofer problems

It sounds like you have a blown sub. Buy a new one from a reputable store and have them install it for you. That way if it doesn't work you won't have to pay for it. Also, be careful hooking a blown sub to a good amp. You can burn up your new amp that way.

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Posted on Dec 18, 2008

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Re: Subwoofer problems - Car Speakers & Subwoofers

What started smoking the Sub or the amp?

Posted on Oct 08, 2007

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I just purchased a 12"

Did you purchase your subwoofer from a retail location or online? If it was local, I would take it back. It sounds like a blown subwoofer. Pull the subwoofer out and smell it. If there is a burned smell, the coil was blown. This would also explain why the cone was not moving, just vibrating. Now the other possibility is the amplifier. Check the fuses and check where you grounded the amp. If you can use a multimeter, use it to check your ground. If it does happen to be a blown subwoofer, you should be able to exchange it (from retail), online takes more time but can be done. However, if you purchased from an individual and the equipment is used, there isn't a whole lot to help with. Good Luck.

Aug 17, 2011 | Pioneer Car Speakers & Subwoofers

1 Answer

I have a Jensen KS212 and I'm connecting it to a home theatre receiver direct to see if it works but nothing comes out of it. Does this mean the sub is not working or there's not enough power from...

Hi, welcome to FixYa..

Your subwoofer requires a seperate amplifier that has low pass filter in the pre out system, which means it will allow all low frequency signals from the input section of the amplifier/ crossover. Your receiver has combined signals of high, mid and midbass signals that will not be able to drive your subwoofer. That is the main reason why some receivers has "Subwoofer Out" to allow you to use "Active Subwoofer systems" (also known has self powered or has a built in amplifier w/ subwoofer)
For you to use your Subwoofer, it must have a seperate amplifier, connect it to Sub out of your receiver and from there you can hear the difference. Hope this helps.

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1 Answer

I recently purchaced the subwoofer and the guy lost the manual for wiring the sub in the box can you explain how to do that?

Here is an excellent reference for wiring any Subwoofer to any Amplifier:

Choose your Amp configuration, number of subs, then the Voice-Coil setup and Ohm Rating.

Mar 28, 2011 | Hifonics AS12SQ Car Speaker

1 Answer

Can i wire one speaker to the other speaker inside the box so that i only have one positive and one negative cable wire coming out out of the box and to the amp

Hello... I can help you with this question. Yes it is possible to do this, but you will have to use a 2 ohm stable mono block amplifier in order to do this. By connecting both positives together and both negatives together, you will be running a 2 ohm load. So if your amp is a monoblock amp, connections will be simple as tieing all the positives together and the negatives together and just hook to the amp. If you are using a 2 channel amplifier that is bridgeable, then you will need to series the subwoofers to an 8 ohm load and then bridge the amplifier to 1 channel. The way you series the subwoofers is take the positive wire in the box and hook to the positive on subwoofer #1. Take the negative wire in the box and hook to the negative on subwoofer #2. Then take a piece of wire and hook the negative from subwoofer #1 to the positive connector on subwoofer #2. Then hook the wires to the amplifier. To bridge the amplifier (if it is a 2 channel bridgeable) would be to use the left positive and the right negative, but check the amplifier for markings to confirm this. If you have any other questions, feel free to let me know and I will help you out! Hope this helps!!

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Mar 22, 2011 | Kicker 05C104 Car Subwoofer

1 Answer

How to assemble boss sub woofer,any?

If you have already bought the subwoofer, you will need to buy an enclosure for it. As well, you will need an amplifier and a compatible receiver for the amplifier.
Once you have all of these components, you will need to wire them all together. For this, you will need a pair of RCA cables to run from the receiver to your amplifier, a power wire to run from your amplifier to your battery, and wire running from your amplifier to your enclosure/subwoofer.
For a more in-depth tutorial on how to install your subwoofer, check here:

Mar 01, 2011 | Boss R12 Riot Series Subwoofers (12 ;...

2 Answers

What is the best size speaker box for this subwoofer

Any type BOX will do...This ensures all the thump to be pushed forward to give all the sound from the speaker forward....enjoy. Alow enough room to get you hand in to wire easy and you should be good.

Dec 27, 2009 | Sony XS-L122P5 Car Subwoofer

1 Answer

How do I install a Visonik Subwoofer Box to a Jeep Cherokee 99'? I am going to keep my factory radio and amplifier.

no you cant just use any subwoofer box you have to buy the box made for jeeps or you will lose all you bass

Jul 10, 2009 | Visonik V123BP Car Subwoofer

2 Answers

Why does my Legacy LSW157 sub-woofer have 2 inputs?

This is called a dual voicecoil subwoofer.

It gives wiring flexibility.

While playing only 1 voicecoil is possible - it is not recommended.

They should be wired to match your amplifier.

If it is 2ohm Mono stable - you can wire both positives and both negatives together to the amplifier so it sees a 2ohm load (parallel wiring)

If your amplifier is not 2 ohm mono stable - you have no option but to either wire up 1 set of coils... or wire them in series.

+ on amplifier to + on coil1
- on coil 1 to + on coil 2
- on coil 2 to - on amplifier

This will yeild an 8ohm load for your amplifier.

Good for sonic clarity - but you will not get the full potential from your amplifier.

Thanks for using FixYa - A FixYa rating is appreciated for answering your FREE question.

May 14, 2009 | Legacy LSW157 Car Subwoofer

1 Answer

How to wire 2 ohm 2 12ich alpine type r's to box terminals?

Dual 4 ohm subwoofers can only be wired @ 1 ohm, 4 ohm or 8 ohm.
2 ohm mono load is not possible.
You will need to use (1) subwoofer to get the 1000W out of the amp.
Wire both positives on one sub to + on amplifier and both - on the same sub to - on amplifier to give the amplifier a 2 Ohm load.
Add a second amplifier, or buy an amplifier that is 1 ohm mono stable.
You can wire both to the amplifier at 4 ohms 600W, but they will share the power and only see 300W ea.

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1 Answer

Subwoofer problems

check your power or ground cable. this normally happens because it is not getting enough power

Jan 10, 2009 | Car Speakers & Subwoofers

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