lol I'm no audio expert so I'll do my best to describe what I think is going on lol

Ever since I was rear ended I've noticed a hell of a drop in volume/bass from the sub. None of my headunit settings have changed, and the battery has not been disconnected.

This morning I've gone to turn the sub off via the headunit (Pioneer DEH MP5500) and discovered that switching the sub 'on' and 'off' has no bloody effect at all. Sub bops along regardless. Weird. I then tried to turn down the volume of the sub, again, no effect even from +6 (max) to -6 (min) there's no discernable increase/decrease in 'thump'.

Fine so mayhaps a fuse is gone or there's a wire/cable that got pulled out in the crash. Nope. Fuses under the bonnet and in the amp are both fine.

The only thing I did notice was that the sub connectors weren't screwed on tight to the wire coming from the amp, so I've tightened that up nice and good. I can't really test ATM as it's sitting in work's carpark. I know that it's not cranking as much as it used to as the car isn't rattling :redface: as much as it used to, and I can't feel the sub thumps through the front seats like before.

Ideas anyone?

do you have a speaker amp aswell?

if so theres a chance the crash repairer re-installed the RCA's wrong, and therefore turning off the sub might actually be turning off the rear speakers, (which if were running sub bass, would be barely audiable)

do you have a speaker amp aswell?

if so theres a chance the crash repairer re-installed the RCA's wrong, and therefore turning off the sub might actually be turning off the rear speakers, (which if were running sub bass, would be barely audiable)

There must certainly be an issue from wiring FROM the Head unit if that is not controlling your sub at all anymore.

Check what Asylum said... If it was simply damaged subs, or damaged amp due to the collision, the headunit would still be able to turn them off and on, and control the db level aswell.

do you have a speaker amp aswell?

if so theres a chance the crash repairer re-installed the RCA's wrong, and therefore turning off the sub might actually be turning off the rear speakers, (which if were running sub bass, would be barely audiable)

I don't have a speaker amp as such. Only the one hooked up to the sub. 'tis a Phillips DAP4040, which is a 4 channel amp. I guess that 2 channels are bridged for the sub :confused:

It is a possibility though that the RCA connectors going from the headunit to the amp have been plugged in wrong hmmmm

I'll have a play this arvo and report back.

It is a possibility though that the RCA connectors going from the headunit to the amp have been plugged in wrong hmmmm

Only if the connection was made incorrectly from the back of the Head unit.

ie. Connected RCA's to Rear or Front output rather than Subwoofer Output.

So was the car taken for repair, and then you noticed the difference? Or was it like almost immediately after the accident?

I'd say the rca connectors..

I accidently did the same thing the other day

Yes indeed the nice gentlemen at the repair shop have indeed fudged my RCA connections.

'tis working great again now, cheers all. I can adjust sub volume and turn the damn thing on and off now. :bowrofl: