When i wire two 12" subs together to run off one channel one of the subs sounds blow, if you press on the center of the cone it feels like it's hitting something.... The kicker is.... When you disconnect either the positive or negative, doesn't matter which one, and you press the center of the cone in the scratching sounds and interference go away..... Can anyone explain why it seems fine by itself but when you tie it in with the other it causes the scratching issue

One of the voice coils is toast. Take a multimeter and switch to ohms. Measure across each positive and negative terminals and see what each reading is on both speakers. I understand that only one is scratching what you could be getting feedback from the other as well so check each individual voice coil. Hopefully you have warranty. Double check all connections .A thumbs up would be greatly appreciated if this answer is helpful to you. Worth fixing.

• Yea, you blew the voice coil. Pressing on the cone where you are is hitting the spot that is making the coil connect again. Just like a shorted wire. Sometimes you can bend it and get a connection. You are gonna have to replace the sub.

• If you have any comments please feel free to leave them here.
• Hope this helps and thank you for using FixYa.

Regards, Tony

Hi there,

I am afraid in order to make use of your sub, you will need to buy an amplifier and a cabling kit to run it. You could run it straight from the headunit from one of the main channels but it would need a crossover so it wasn't fed any sounds which it couldn't cope with (high frequencies, they require very fast movement of the speaker cone, your sub wouldn't be able to do it)

Here is a link to a downloadable copy of headunit manul.

Hope this helps

Hello king3132,

Three 4 ohm subs can be wired parallel for a 1.34 ohm final load or series for a 12 ohm load. If you have the channels of the amp bridged, I hope that the subs are connected in series because the Sony XM-2200GTX is NOT rated for or stable at 1.34 ohms. It's only stable down to 4 ohms.

You definitely will not get the maximum potential of the subs from that amp. They can handle 400 watts RMS each (total 1,200 watts) and the amp is only capable of 500 watts RMS into 4 ohms (less at higher impedance), so each sub could only be getting a maximum of 166.6 watts RMS.

Hope this helps.

you can run each sub at either 4ohms or 1ohm which means that two of them will run at either 2ohms or .5ohms....be careful how you wire them because most amps cannot handle .5ohms very well and might blow.....to wire them for 2ohms you will need to wire each sub the following way. they have two voice coils make a jumper wire connecting the negative on one coil to the positive on the other coil. what you are left with is a coil with an open positive and the other coil has an open negative. when both subs are wired like this connect the two positive terminals together (1 from each sub) and the two negative terminals together (1 from each sub) now the subs should be wired together at a 2ohm load. run the two positive wires into another combined wire which will run to the positive speaker terminal on the amp. do the same for the negatives

Agree with Kev. Even if the woven lead wire looks ok, it can still be bad. I unsoldered it, clipped a lil from both ends, and re-soldered it. Works great now.

I'm not understanding what you mean by the "Sub doesn't even sound blown" if it doesn't play at all. One thing you can check is if you gently push in on the cone you shouldn't hear anything, if you hear a scratching noise and can feel resistance then you have a problem. If you have an OHM meter, you can check the voice coil impedance, it is a down and dirty way of checking to see if it is good or not. Measure all of the voice coils that you have and they should all read about the same, not necessarily exactly the same but pretty close. This test should tell you a lot. If it seems to test out fine there is something wrong else where. Let me know if you need more help.
-Andrew Hawkins

First of all how many ohm's are each subwoofer rated at . Are the subwoofers dual voice coil or single voice coil. Once I know that I can help you. I think the JL amp is not recommended below a 2ohm load.

For each sub, tie the DVCs in parallel ("+"s together, then "-"s together). This will make the subs look like 2 ohms to the amp. Then, put one sub on each channel of the amp. That will put about 280W rms onto each sub, the max for the amp.

Connect each speaker coil one at a time to a square 9 volt battery and watch for the cone to move.

Also try hooking another speaker to your amp just to make sure the noise isn't in the amp.

You can use a 9 volt battery to test wire polarity also. Hook up the + wire of the speaker to the + terminal of the battery and the - speaker to the - battery terminal. If the speaker moved UP or OUT then the wiring is correct. If it moved IN or DOWN then the + and - wires are backwards on the speaker.

Also if you have two or more speakers hooked together test all the same way while they are hooked to each other. ALL of the speakers need to move in the same direction at the same time.

Clipping causes more speaker damage than anything. "Dirty Power" can happen in good quality amps too. The gain control is to match the voltage between the headunit and the amp. It is NOT a volume or boost knob. If you overdrive the first stage of the amp and then clip it damage will occur to the amp and speakers at some point.

Hope this helps.