Question about DHD NTX-6812 Car Subwoofer

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Sub does not fully work

About 2 weeks after I bought 2 of these subs I noticed a kind of acidy smell coming from my trunk (I thought it was the box since that was new). Anyways after another week or so I was driving down the road and and lost bass, so of course not being new to sound systems, I checked the fuses on my amp then the fuse leading to the battery, which had blown, no surprise since I am running 2 DHD subs and a 2000 watt legacy amp at 1 ohm. So the problem now is that when I turn the subs on even at a low level it causes my amp to draw insane amounts of amperage, about the same as it would cranked when everything was working. The odd thing is that one sub appears to work fine but the other hardly moves with the same amount of power. If I try to turn the subs past any low level it causes my amp to go into overload protection. Any Ideas would be greatly apprecaited! Also does DHD Power Cruiser have a website?

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  • 156 Answers

My guess is that one of your subs has a damaged voice coil, which acts like a short circuit to the speaker outputs. If you put an ohmmeter on the speaker terminals you should measure a resistance of not much less than 2 ohms (assuming you've wired the VC's in parallel). If you measure a significantly lower resistance then you have a damaged subwoofer.

Posted on Mar 13, 2007

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Posted on Jan 02, 2017

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1 Answer

RF p2d2 12 smoking


you cooked the coil in the sub when you see smoke you have clipped the sub. improper wiring probably the issue ohms must match gain must be set properly . if you had gain all the way up thats what did it.

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2003 Cadillac DTS w/Bose, has rear sub & adding Pyle dual 10 sub


two channel will do with the same power power rating of your speakers ex. your speaker is 500 watts per piece so you need to buy a 500 watts per channel amplifier

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PS-212 Suddenly stopped working


I HAVE 4 PS212 AND FROM WHAT YOU ARE DISCRIBING SOUNDS SIMILIAR TO WHAT HAPPENED TO ME. PLAYING THE SUB AT FULL VOLUME AND CLIPPING OCCURED NOT KNOWING THAT THE FAINT SMELL WAS THE VOICE COIL BURNING AND CONTINUING TO PLAY UNTIL KNOW SOUND LESSON LEARNED BUY A BIGGER SUB SYSTEM OR REPLACE YOUR SUB WOOFER.
IN MY OPPINION THIS IS A VERY GOOD PRODUCT WHICH I HAVE BEEN ABUSEING FOR MONTHS . SO QUIT WHINEING AND PAY YOUR DUES.

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1 Answer

Rockford sub squeaks


Hello markwasicki,

You did not specify what type of enclosure the subs are in or if they share the same airspace. But the sound you describe sounds suspiciously like the enclosure is at fault and not the sub itself.

Remove and reverse the subs in the box and test for the noise again. If the noise is still produced on the same side of the box, it's the enclosure. If the noise follows the sub, then you have a problem with that sub.

If the box is making the noise, and it's a ported box, you probably have "port noise". If it's a sealed enclosure, you could have either an air leak or flexing noise. In either case, repair the enclosure or put the subs in a new one. If the sub itself is making the noise, there probably isn't much you can do. Most likely some part of the voice coil assembly is touching where it should not.

Hope this helps.

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1 Answer

Kicker sub wont work


Im guessing that it is possibly blown... either you ran too much power to it, or it was hooked up wrong... you should unscrew the sub from the box and look inside to make sure that it is connected correctly.... positive to positive, negative to negative,,, if they so much as touched then the L7 could very well be blown.... smell the magnet and if you smell a burnt smell... it is blown... maybe turn your amp down a little... its possible that it is also in protect mode because you are running too many watts to the amp. Feel free to ask if you have any other questions.... Please rate! :D And good luck... i really hope its not burnt out. that stuff is not cheap.

Dec 29, 2008 | Kicker Car Audio & Video

1 Answer

Solo x 10 dual 2 ohm smells burnt and smoke


there is no such speaker as a solo-X L5.
The Solobaric L5 is 450Watts RMS and 900 Peak.
Check your documentation, and no warranty except Massive Audio covers Burned Voicecoils as it is deemed customer abuse.
If it is a typo, and not an L5, your combination (as long as each is level matched) should be ok to run on that sub. When wiring it as you describe, the two amplifiers need to be identically matched in order for both coils to play at the same level.
Seek professional installations so your warranty is intact.

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1 Answer

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Did you check to make sure that you didn't blow a channel in the amp? Another thing to check would be the connection on the inside of your box, maybe there is just a wire loose.

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1 Answer

Subwoofer Wont Work


If the connections are correct...?
then it doesn't sound like theres a problem with the amp.

make sure the amp is not to powerful for the sub?
eg: 1000w amp, 500w sub.

Sounds stupid but it happens.

make sure the gain / volume is not too high!

if your BMW has a totally sealed, metal boot area this doesn't help.

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2 Answers

Just stopped playing


is it a seald box or a ported box?

Oct 23, 2007 | Jl Audio 12W7 Car Subwoofer

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