Plz Help Diagnose My Sub&amp Tube

[awsam]

Hi everyone,

I've had this Fusion sub/amp tube for about a year now, yesterday when driving home it just cut out (it was pretty hot day in Adelaide)

and now I get 1 thump every 5ish seconds (it doesn't matter if music is playing or not) and the protection light under the amp is ON

for 5ish seconds, when it flickers off the sub thumps.

Has anyone else experienced this same problem?

Youtube video of exactly whats happening http://www.youtube.com/watch?v=A-8YO1eH0EU&feature=youtu.be

[awsam]

Fuse is fine.

The thick red wire looks like it might be loose though, what is the red wire exactly?

[Carbon 34]

it was 37 today, outside, in your boot blasting it was at least 50c most amps of that quality shut down in protection mode around 50-70c , you can see and hear the problem is distortion, the clip light comes on the controller even before you leave the car, turn the bass boost to 0

on the radio and the sub tube, and lower the volume ... on the radio and the amp gain it looks maxed out, it shouldnt be

the sub sounds close to frying or dead as well, if you watch it pump in all of the sudden , the voice coils would be super heated.

turn down all bass boost to 0

let the thing cool to the touch, tighten all connections

test again at low volume, works or not ?

works then you most likley had heat or loose connection issues

doesnt work still,

unplug the rca cables while radio is off, power it up go to boot and check the amp lights, is it in protection mode still ? yes, fried the sub , amp, or wiring issues

no issues, then turn off radio again, replug RCA, turn on radio, does it come back ? yes then you have bad rca , grounded under seat or other pinch point,

it can be a pinched wire on the remote bass knob, some feedback to amp if grounded out.

I''m sure its overheated without even looking at it. and your volume control settings

might be the frog eating the harness ? looks a bit shonky install so I can only imagine the rest.

[awsam]

Thanks for your trouble shooting solutions. Yes, on real hot days is does cut out after driving for a while. When this happens I usually turn the sub volume to 0, or turn music off all together.

The video was done the next day, and it still behaves the same way at night. I have unplugged the L/R cables and the sub still behaves the same even without signal from the cd player.

Fuses are fine, even replaced the battery (needed a new one anyway)

HA! The isn't much else for the frog to eat I didn't have a din pocket and the car had factory double din when i bought it, so it looks a bit shit

[Carbon 34]

well if the tube is out of warranty, next step is carefully remove the speaker and unplug it. leave the rca and amp wires on tube with no sub speaker on the amp see if it goes into protection? take not or photos of how its plugged in if required to reinstall ? and make sure the wires dont touch you just removed !!

yes.. then I would say you most likely fried the amp section. if you have access to a 12volt battery not in the car and some jumper wires you can try no car and just wire the tube right to the battery to see if it goes into protection right off the bat

no ,.... the sub is fried, see if the sub moves in and out smoothly with you fingers, any grating /grinding feel or sticking ? smell it does it smell burnt by the magnet ?

ohm tester ? if so throw it on the sub at rest it should be around 4 ohms give or take, not sure what ohm load that runs but prob 4 ohms

if the tube is out of warranty you can rebuild it and reuse it. , see what you find and I can explain the rebuild if needed.

near 40 on sunday coming up so amps will be damn hot in a boot , even turned off they will

Edited December 27, 2011 by Carbon 34