Well, I had this my sub system for about 6-8 months before everything crapped out. I'd like to see what you more experienced guys think happened. The system was a pair of infinity 1230w's (single 4 ohm coils) wired @ 2 ohms running off an mtx 500d amp. They were in a sealed dual chambered mdf box, made to exact specifications for the subs.

What happened is that they just stopped working one day, I checked my amp first, all 3 fuses on it were blown. So i figured I'd replace them. Everything still didn't work. I checked the 60amp fuse from my battery, it wasn't blown. Then I decided to check the subs by pushing them, the subs were stiff, like they didn't move anymore like they're sposed to (what does that mean and how does that occur).

So i decided to go out to some warehouse place to buy some really cheap subs to replace them for the time being, i got some dirt cheap visionik subs (actually rated at higher RMS then the infinitys). So I wire them up exactly like the infinities were. hopeing that everything would work again, i plug everything together and low and behold, my amp starting emitting this white smoke (great)....then i noticed the subs themselves were smoking also, which reaked(what the hell went on here). Well i turned off the the car and rechecked all the wiring to see what was wrong, but nothing was wired incorrectly, which leaves me clueless as to why everything died =(

If anyone can elaborate me on this, i'd be very greatful, so i don't do the same mistakes again.

 

sounds to me like your amp is sending dc current on the output mtx is very famous for that i had a 2300 and a 2160 never had a problem but a lot of people around here had that problem. if anything get a different amp and check all your wiring. make sure you upgrade your ground at the battery as well. best of luck

 

I would say that since the woofers actually seized up on you the coils are probably burned. I have set up an MTX 6500D onto a single Arc Audio KAR series 12" and had no problems so I wouldnt blame the amp, I would say that maybe you were driving them into a clip and just fried the coils. I would back off the gain a bit and when you take the woofers out of the box and if they stink like hell then you have your culprit...

 

Your amp is faulty and fried your subs. Discard/repair that amp! Im sorry to hear that.

 

The infinity subs were probably the source of disaster IMO...

Sounds like you blew the subs and siezed the coil.. when this happened the coil shorted in the gap, and in turn the outputs on your amp were shorted... pop goes the wheasel you now have blown outputs....

The amp should have gone into protection when the outputs were shorted.. but we arnt always that lucky...

 

Why would you say it is faulty???

 

If the subs are at fault then the protection circuitry in the amp has obviousely failed, thus making it an amplifier issue. To me it does sound like a power supply or output issue in the amplifier. Generally speaking, if the fuses in the amp are blown, it is an internal amplifier issue. Check the resistance on your ground return. Where is the ground attached to and what guage wire in what kind of car?

 

Why would you say it is faulty??? </font>[/QUOTE]Because it smoked 2 sets of subs.

As was mentioned above, the amp may not have been the original problem, the subs could have seized/shorted causing the amp to overload. But as a result, the amp is now smoked. You tested the amp with other subs and proved that the amp is smoked.

 

Why would you say it is faulty??? </font>[/QUOTE]Because it smoked 2 sets of subs.

As was mentioned above, the amp may not have been the original problem, the subs could have seized/shorted causing the amp to overload. But as a result, the amp is now smoked. You tested the amp with other subs and proved that the amp is smoked. </font>[/QUOTE]what I was trying to say is that the amp is now "faulty" because when the first set of woofers seized probably due to clipping it shorted and showed the amplifier a dead short which the protection for whatever reason did not do what it was supposed to(which does happen, protection does not always work) thus now the amplifier is now "faulty". If the amp still turns on but has no output then you know that the output section is smoked and it was probably due to a dead short which was caused by the clip to the woofers. I say this with only the info that was given in the original post.