Question about DHD NTX-2009 Car Audio Amplifier

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Does dhd have tech support my speaker connect broke off inside

My amp became loose in my trunk and hit something causing the speaker connection to break off i thought someone robbed me cause i got in my car and didnt hear nothing bumpin in my trunk lol ......

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Yes they should have techinal support it should be on the back of your amp. If you open up amp soder a 12 guage wire where the terminal used to be. Thats what i did and never had a problem. hope this helps

Posted on Jan 13, 2009

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I had the exact same issue with my 2007 Yaris. I took the radio out and checked all the connections- (all Good) then traced the wires through out untill I reached the trunk. I had a bunch of stuff in the trunk that had some how hit the speaker connections and bent the connections on one of the speakers. I removed all the stuff from the trunk and re-solder the connections. After that the speakers kicked back on for the entire car.
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The ZR series amps had several problems that could be an issue for your amp. The modules failed and caused intermittent problems. If you know someone with a similar amp, try to borrow their module. The solder connections on the vertical board (the one the module pluges into) develops cracks in the solder connection where the vertical board connects to the main board. The amps have a fuse that is connected in series between the input RCA shield and the secondary ground. This fuse can be blown by shorted speaker wires (shorting to chassis ground). It's a surface mount fuse that's under the main board. Virtually all of these should be checked and/or repaired by a qualified technician. There is also the possibility that the head unit is damaged (assuming the head unit is connected directly to the amp). If the shields for the RCA jacks are open, it can cause the same problems as when the shield fuse opens in the amplifier. To check the shields of the head unit, you unplug all of the RCA cables from the head unit and measure the resistance between the shield of the RCA output jack and the case of the head unit. There should be no more than ~1-2 ohms resistance between any of the RCA output jack shields and the case. If there is significant resistance or it's open, the head unit needs to be repaired.

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With two 4 ohm svc subs and a 4ch amp the best way to hook it up is as you have described. There is no way of wiring it to get a lower ohm with your set up.

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1 Answer

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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.

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Voice coil has been blown open. Most likely alot of times what I do to test a speaker is connect it to a 9 volt battery. on and off and the speaker should bounce. If not speaker is blown. Plus this way you could save yourself lots of problems. If the speaker was shorted and not blown open. You would now possible have a blown amp and home stereo.

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