I think my sub is broke :(

[Shady Pioneer]

I've had my sound system installed for over 3 months and it's been great until now.

The other day the sub cut out and then came back in during a song, and it did this for a day, I assumed it was a loose connection so I took out the headunit to make sure the RCA lead was plugged in correctly and it was. I checked the amp and sub connections and all those are right so I took the sub out of the sub box to see if the wire was loose in there. Nope, it's all connected as it should be.

I've no idea what the problem is.

The RCA leads are both working because I swapped them round (so used the RCA for the sub for use with the components but they still worked so it's not the RCA lead either).

Any ideas?

[GOLF_MK]

Bad Earth?

[Shady Pioneer]

It can't be the earth because my amp is connected / earthed and the sub is connected to the earthed amp which is still working with my front components.

[Olly_P]

Use a 9v battery and use it to test if the speaker cones moving in and out, see if its the connection. Sounds like the amp tbh, overheating?

[Shady Pioneer]

But surely if it was the amp my components wouldn't work either would they? If it overheats it goes into protect mode but I've it scorching hot before on the hottest day we've had during the summer and still it's ben fine.

What do you mean by using a 9v battery?

[Ruji]

perhaps you needed to turn down the gain and impedance settings on the amp and as a result of it, has send the woofer to overplay itself and the glue from the back of the woofer has come away from the cone. Try a continuity test with a volt meter from the woofer box terminals to see if you get a complete circuit. If you get NO reading, then you have a fault with the speaker itself! if you do get a closed circuit reading, play ur music and apply a little bit of pressure with your hand on the centre of the woofer pushin it in to see if the speaker cuts in n out or if u hear a crackling sound!? if u get nuthin at all...but u get continuity, it could b an amp problem. check the speaker wires connecting the amp to the woofer box.

Otherwise it may just be that the subwoofer has blown! Sometimes giving a new woofer a bit of power from contant music doesnt allow for it to break in eficiently and can potentially damage it even if you thinkit is new and should have lasted longer! I know I have certainly experienced that!