I made a previous thread, but it got no love...

Anyways, my sub (Diamond Audio-10') hooked up to a pioneer avic is not hitting anymore, it was profesionally installed. I checked the fuse on the amp, and replaced it. But, the SUB does hit if I push it in a little (literally) it will start hitting for a few minutes than stop. I tweaked around with the amplifier settings, but no luck. I have yet to take the sub out of the box, maybe something there. Lastly, I also made sure all connections were sealed and had proper connection. Any input is HIGHLY appreciated. THANKS!~!

 

What part are you pushing in? I would say a good place to start to check would be to get a multimeter to check the amp out to make sure it is giving a signal to the sub. If it is, try taking the sub out of the box and check to make sure everything looks good and connected. Which part of sac are you from?

 

yeah the way you described it
its hard to tell if its about the sub or the amp

they are completely separate entities

 

So you are pushing on the sub's cone and it starts to play? Sounds to me like the voice coil is shot or one of the speaker leads came out of the coil. Disconnect the amp from the sub and put a meter on the subs speaker inputs and see what reading you get. Also, see if the reading changes when you push on the cone. If you don't get any reading until you push the cone then you have a problem. Either way I would bring it back to the shop that installed it. Is it still under warranty?

 

I'm from Roseville, and yea I have no clue what a multimeter is...I'm going to take the sub out of the box today, look it over. Also, what I'm trying to say is that when you push the (sub) in with a finger it will hit for a little while, and then stop. Sorry if I'm not to clear on that.

 

It was installed at car tunz in Pleasanton, I've had the actual sub for over 2 years now, I heard from some others it might be the voice coil as well. Where can I get a multimeter from, and how much? Also, it's a far trip from sac to pleasanton, but if I have to, it's not a big deal.

Sucks, because I spent a lot of money on this setup, and to have it shot so early, without me turning the amp more than half way up is a travesty.

 

Before you go out and spend money on a multimeter just unscrew the sub from the box and take a look at it. Pay close attention to the speaker leads connected to the voice coil (They start at the terminals where the speaker wire plugs into the subwoofer) Make sure their solder joints are in good order and not broken or loose. If this all appears fine, use your multimeter to check the resistance across the inputs. If this is a dual voice coil sub (indicated by having 2 sets of speaker wire inputs on the subwoofer itself) then check both sets of leads and meter each terminal separately. Your meter should read the given resistance of your subwoofer (probably either 2 or 4 ohms) within say +- 1 ohm. If it is less than 1 or greater than say 10, you have a broken subwoofer. If it reads fine, then you may have a problem with your amp, or an intermittent problem with your sub.

Radioshack, Lowes, Home Depot, True Value, Autozone...places like that will have a multimeter. Just get the cheapest one (~$15-$25) that measures resistance (its measured in ohms (the symbol is the greek letter, omega).

Good Luck!

 

It's not how far up the amp is turned that will damage a speaker, but rather how you listen to it. To little power is worse then to much power. It's very rare I see a speaker that is damaged from to much power, but I see damaged speakers all the time that are under powered and blown because of distortion. If you play the system beyond it's limits and it distorts then problems will occur. I'm not saying you did that, but most of the problems I see are caused my distortion and not power.

 

That makes sense, I completely understand where your coming from...I'm a little sick this week, but I'm going to try and unscrew it today and take a look, will post some pics for you guys, thanks for all the informative information...I also think (we) got a meter to measure as well, just got to dig around a bit.

 

Thanks for the info. I will snap some pics as soon as I get it open, again appreciate the information.

 

Alright, here's some pics...sorry for bad quality.
Anyways, this is going to sound stupid, but I wanted to make sure I had the right settings on the meter to measure, and I didn't get any numbers back when I connected the red and black wires. Point me in the right direction, please. Thanks.

 

 

You have the meter set right. Make sure to disconnect the speaker wires before you check the speaker or you won't get a proper reading.

 

speaker wires, as in the wires connected to the sub? or connected to the box

I think I need a new sub, seems like it sounds super ****ty the more I press on it, as if a voice coil is messed up....
my only question is, if I purchase a new sub, how can I avoid this...

 

Disconnect the wires on the sub. Does the cone feel like its rubbing as you push on it or does it move smoothly? If it's rubbing the voice coil is probably shot.

The only way to avoid it from happening again is to train yourself to hear distortion. I used to be an IASSCA judge back in the day when sound quality meant more then SPL. Unlike the **** I see at shows these days. There is a point in every system where turning up the volume does increase the sound, but rather it increases distortion and that's what kills speakers.