Not Good

[fb4076]

Ok, this morning I went out to my car, and one of my subs is not playing. I have two solobaric L7's in a 5.65 cubic foot ported box. They are being powered by two MA Audio HK1998 amps. MA claims that they put out 1200 RMS, not sure how true that is. I am not sure if the subs have enough power to blow, or if the sub is even blown. I have not heard any like popping or crackling sounds. The gains are only turned up to like a third of the way up... the bass boost was at 0. Just wondering if you knew what could have happened. I guess the wiring could have come loose inside the box, but that is somewhat of a pain to have to do....

[fugyaself]

Eh these get old pretty fast.




No one can tell you a thing about whats going on. There are millions of possibilities. INVESTIGATE! Check wiring. Check connections. Check HU. Check settings.

[fb4076]

Yes, and I understand all that, which is precisely why I asked the question. I have checked the wiring, today I pulled the sub out, the wiring is fine. After unplugging the other sub, I realized that the sub in question is doing nothing at all. I thought I once read that I blown sub will vibrate and possibly make a low grade rumble... maybe I am wrong though.

[Honest Bob]

I blew two subs. Both of mine just stopped playing and I smelled smoke

After that it was hard to move the cone, they would make a scuffing noise when moved.

Maybe the tinsle lead snapped? Are you running a two channel amp? If so switch the channels around to see if one channel is blown.

[sandt38]

Try switching the subs and amps. So say the left amp is powering the left sub, try powering the right sub with the left amp.

[fugyaself]

Also, physically inspect the sub.

Check all tinsel leads and look for breakage. Use a battery to "pop" the cone out by connecting it to the + and -

Very carefully and with even pressure move the cone either in or out with your hands. It should move freely and there should be no rubbing sounds. Do the same with the other sub and compare. It is best to do this out of box as there will be no back pressure.


What of the RCA's? Are they in good condition. Both plugged in? Do you have another pair to swap out?


Sorry if I was a bit testy with my initial response. I was a bit annoyed to begin with

[fb4076]

Well... I remembered from a previous thread to try and move the subs, did that, they both seem to move the same. Both amps are on the same settings, and they are one channel. RCA's look good. I will have to buy more RCA's to switch the amp/subs because I had about one inch left over so there will be no simple swapping. I was going to do that, but I will have to wait until tomorrow because I don't want to go to Wal-Mart to buy RCA's this late. I called the local store to see if they could inspect them, and they told me the only thing to do was to send the subs back to Kicker and have them inspect it.... Correct me if I am wrong, but isn't there something that I store that focuses on car audio could be able to do? Even if it was a fee service? That seems like a lot more hassle than is necessary. They are the only shop within 3 hours of me, and Kickers headquarters are 2.5, so if I went somewhere else, it would make just as much sense to drive to Stillwater.

[Honest Bob]

Basicly all you have to do is check where the speaker wire connects to the terminal on the sub. From there there should be two silver wires going to the cone of the sub. The could even be embedded into the spider. I would also switch the subs around, see if the one that dosent work now works on the other amp.

[fb4076]

alright, well... I will check for those silver wires, make sure they are ok, and tomorrow I will just switch the subs to the other amps... hopefully that works....

[geolemon]

Just take a 9v battery out of one of your smoke detectors and touch it to the speaker... one terminal to the +, one terminal to the-.
Depending on which way you apply the battery, the cone should either move in, or move out... and you'll hear it making some quiet crackly sounding noises too as you move the battery around.. no biggie.

If it doesn't move, you know your sub is dead.
If it does move, it's worth investigating further.
But that would be step 1 in my opinion.

And when you are testing the sub, make sure there's no other wiring hooked up to the sub... or you'll end up sending 9v into your amp or something, not to mention not getting your expected results.