Subwoofer not working

[suttonschinook]

I started my car yesterday afternoon, the stereo came on but no bass! WTF???!!! I checked all the wires I could then decided to take it to Mazda. Mazda said they couldn't find anything wrong with the amp or anything else so they just ordered me another sub. Any idea why this would happen? Just letting you guys know. Evan

 

[Limited Edition]

Try the AM botton on the upper left hand corner.
Hold down on it for at least 3 seconds.
If all wiring is correctly plugged, this should do the job!
good luck

 

[changedman]

otherwise, make sure the gains (bass volume control) is turned up on the sub, and make sure the deck is actually tuned for bass use (meaning make sure the headunit knows you have a sub and make sure you have set it up, etc) I tuned mine, it was so low (quiet) until i made my own EQ setting

 

[RuggedMazda]

Damn, I had the same s*** happen to me today... Well, today was the first time I went to check the sub. It's been like this for about two weeks. So has Mazda really ordered that new sub for you suttonschinook? I heard that some people were having a hard time getting any Kenwood work done on the car, they said you would have to get it done through Kenwood....
Well, guess I will try with my dealer...
Oh, I guess it's bad cause even the AM button does not change anything...

 

[1sty]

Any decent stereo shop should be able to rouble shoot the problem in an hour or 2.

 

[suttonschinook]

Yeah they just replaced it on thursday. I had no problem with getting the work done. In and out in about 40 min. Not bad for a dealer. I have no idea why it stopped working. Neither does mazda. They checked everything and everything was fine. Maybe Kenwood has a manufacturing flaw. Who knows. I'm just glad to have some boom boom for my zoom zoom

 

[1sty]

If they just replaced the sub and then all was good then you probably smoked the sub by throwing way to much distortion to it. Distortion will smoke any sub especialy a crappy little 8" that is being driven by an amp in total saturation. Keep the bass on 0 and only use the sub volume.
The only way it could be Mazda or Kenwoods fualt is if they put the gain to high.

 

[Notorious]

I'm having the exact same problem right now. One day it just stopped working. Power is going to the amp. The car is in the shop right now. They are also ordering a new sub.

 

[1sty]

If you send a sub enough distortion it will sieze or become and insanely high impedance and stop making any sound other then a barely audible muffled ping. Also if over powered the sub can also nuke. Can one of you guys keep the sub and do a few test on it for me?

 

[suttonschinook]

My sub stopped working again. I guess I'll just go buy a 12". What test would you need done? Evan

 

[1sty]

Just need you to have the sub in your hand in a Digital multimeter in the other.
- I want to know first can the subs cone still move freely.
- Then what is the impedance across the subs coil.
- Then take a 9 volt battery and strap the negative to the battery to the negative of the sub then tap the positive of the battery to the positive of the sub. Do this quickly to see if the sub fires out at all.

 

[1sty]

Oh and you could just try to put a 8W0 or 8W3 JL in there.

 

[suttonschinook]

Explain to me how I would measure the impeadance. Not very audio equipment smart.

 

[chuyler1]

You need a multimeter. You can pick one up at Radio Shack that will mesure impedence and voltage.

 

[suttonschinook]

Got a multimeter just don't know which symbol I need to have it on. God I need to learn how to use the tools I have. Evan

 

[suttonschinook]

Also anyone know how to remove the sub box in the back of the msp?

 

[chuyler1]

It looks the Pioneer symbol, an upside down U.

 

[1sty]

Its the omega symbol, its a horse shoe chape.
you want it on the auto or 10-20 range. Dont take down the box just unscrew the sub.
Remember only do this to a "dead" sub. I know what you will read for a properly working one!

 

[chuyler1]

I killed an eclipse 86 series 12" within 2 days (must have had a defect). When I pulled it out of the box, first of I noticed the smell, then I checked and one voice coil was 3.9-4.0 ohms, and the other was 0.07 ohms...which would explain why my PPI amp kept turning off. I melted one of the voice coils.

I brought it back to the store and they replaced it on the spot.

 

[suttonschinook]

How the hell do I get the screen off the sub?