Bad Voice Coil or over powered

[k.i.t.t.2010 0]

Hi guys ! I was wondeering if can all help me out.. I purshased 2 12' Fibtl Fully loaded and after all I descided to try on with 1 first . I hoocked it up to a Hifonics Colossus XXV and wired it a 1ohm ...after like 5 minutes of playing time...the sub was working on and off. To me it looks like when it gets warmed up the sub completly stops working...but if I leave it cool off..it will work for a minimal amount of time. My amps never lost power and always stayed on. Do you guys think I blew the sub ??? or should I try to rewire the sub to a higher ohm ??? Thanks for all your inputs and help on getting my problem resolved !

[MHayes 2]

Put a multimeter on the sub and get a coil reading,that's where i would start.

[jonbearsmt 919]

thats really not enough power for both of those subs to make them reach mechanical failure... but thermal failure better chance...

where are your settings? including gain, head unit and amp settings?

[stevemead08 752]

How did you set your gains? Clipping?

[jonbearsmt 919]

Clipping?

thats what im thinking.

[stevemead08 752]

Dose the amp go into protect mode? It sound like the amp is sent into clipping and heats up, putting it into protect mode. Once it cools, it works again. More info would be helpfull.

[k.i.t.t.2010 0]

Thanks everyone...First of , Big Jon I am only using 1 12btl at the moment . that's why I am asking if I am over powering the Fi ? thanks mhayes before doing anything I'll do that. Steve, my Idiol Steve , my gain is set a half , and the power dosn't seen to shut off on my amp...all the light on the amp stayed on...it's the sub , at first it hits hard then it start lagging and after a minute nothing !???

[k.i.t.t.2010 0]

Clipping?

thats what im thinking.

how can I explain this ? when I say Clipping , it's like the sub start to hit and then slowly fades away into nothing ! like 20 secondes of bass time !?

[stevemead08 752]

First thing i would do is take it from the box and inspect it. inspect your wiring also. maybe a lead broke or is breaking. maybe a speaker wire is just bearly touching.

[95Honda 486]

There is usually only 2 ways to ruin the voice coil. I know there are some people out there that have even found more creative ways, but this is it most of the time.

#1 mechanical failure (when the former hits something). This can change the shape of the coil and cause rubbing, shorts and opens.

#2 Thermal failure (when the voice coil actually breaks down due to heat). This happens because you apply more power to the voice coil than it can dissipate. This has nothing to due with anything other than too much damn power. Not clipping, not gain setting, not "dirty watts" just too much damn power....

#1 is usually pretty easy to identify as you normally hear a loud "clank"

#2 doesn't happen immediately and is probably the most common.....

Both of these are only caused by user error....

[NDMstang65 403]

Or...you microwave tinsel leads and yank them past mechanical limitations and they pop like a fuse.

(which is most likely..very rarely does a coil ever burn up because of the cooling technology in a BTL)