I was coming back from school today and it was cold out and saw this little car pass me and all of the exhaust flew next to me while I was driving. Nothing strange, but then I get this nasty smell, thinking maybe its the exhaust from the little car or something.

As I pull into my driveway (while listening to Metallica's Some Kind of Monster, normal sound level) I notice my subs don't come in very much on the song. So I pull inside and look for cracks and breaks in all my speakers any in my two subs. Then I turn on the music again thinking maybe the song is just crappy quality or something. Sure enough I go to one of my subs and all I hear is brmmmmmmm brmmmm. The sub is an 8" JL Audio JL 8W0-4. I'm giving it too many watts and I guess I just pushed it too hard.

Really bummed.

Sooner or later I'm gonna need a replacement, maybe even the same sub, because it's a custom enclosure. If I were to buy a new sub I would have to make all new enclosures, and possible relocate them because right now they are under my seat, in almost the tightest spot. So no JL is industrucable huh?

Just had to vent.

Update: It's fixed!!! We checked all cables, connects, settings, everything. Then we ran the subs off the Alpine amp and they ran fine. So we thought it was my hifonics amp. Then after tinkering with many connects and settings, it just worked. Then after messing with my ipod and hu, a slight buzz happened. We were worried something was wrong with the ground or components again. Everything was soldered by the way. Turns out we had changed a crossover on the amp and the buzz went away. Everything back to normal. These things take a lot of vibration, and wouldn't be surprised if something funny happed again.

Both of the subs specs are RMS:75 and Peak:150

The hifonics is a 2 channel pushing them both at 100 RMS (does not say peak for amp). Everything is running on 4 Ohms. Just a wierd situation.

 

How much were you overpowering it?

 

Seriously?

100 minus 75 = 25.

Although i bet its slightly less, Hifonics tend to overate their amps slightly.

 

I think this is one of those situations where you are wanting more than you can get out of what you have. it happens.. time to upgrade

 

Well my system's on the fritz again! Woke up this morning and stared the truck, and a huge whine was coming from the speakers, and only got louder when I revved the truck. If I took the subwoofer cables out of the amp, it would quit but the speakers got so high pitched and sounded really chitty. I'v called around and talked to some people, and I think their might be something wrong with the ground.

I'm really happy with the current system when it works. It's clear when I want it to be and loud on demand. It was all around $850 which was the hu, 4 speakers, 2 subs, 2 amps, and wiring and boxes. I also still have all my space too which i'm happy about. If something ever happens were its toast, I might just get a 12" or 15" and put it in the middle with a custom enclosure.

 

well the shops told you the grounds, and thats exactly what i would say as well, check all grounds even the headunit(try chassis grounding it instead of to the harnes)

also one problem it could be is your rca's too close to a power wire but since it just started i doubt its that....

do your homework and report back to us

 

I think it not being grounded would also have to do with why when you unplug the sub's wires, the speakers get quieter. The speakers run off of a completely different amp and the hifonics one whould have nothing to do with that. When you would plug them back in, the speakers went up to full power.

 

weird


check all your wireing, run separate rem's also separate rca's incase you are doing a pass though type of thing with your speaker amp.....umm and what size power wire are you useing

 

Okay..I think we did it. First we checked every ground; which all were to the chassis and in place nice and tight. Then we researched a little and came across a pretty well known defect. It's a small Pico-fuse inside the HU. While swapping around cables we probably blew this. Pioneer puts this there to protect your HU from being fried (and so you can send it in for more money).

So we took all of the RCA's from the HU and tied them together with wire then routed them back to the ground in the HU. NO MORE ALTERNATOR WHINE!. Everything went back to normal. So we are going to buy a small pico fuse and mount it externally, because it is out of warranty. That should permanently fix the problem, and still protect the HU.

HU is a Pioneer DEH-P780MP

 

pioneers do that

 

yeah

 

msall- He didn't have that info in his post when I asked. Note where it says "Update" and "Edited at 7:26" I posted at 7:02.

Sheesh. Can't catch a break around here