Hi all, I'm new around here, so apologies if this has been covered before (or if the topic is easily google-able, i've tried to no avail). The problem: After having my alternator replaced by Evans Halshaw (under an extended warranty), my woofers have not been working - no sound whatsoever. This lead me to believe that something simply hasn't been connected back up, as the tweeters work fine, and if the woofers were simply broken, wouldn't there still be some sound/would they all really fail at the same time? Went back to Halshaw, and the service manager denies that they could have done anything that would cause this, they have offered to have a look but essentially told me I'd be paying for it. I know little about car stereo's, could they have done something while installing the alternator? Its pretty evident that the speakers worked fine before, but not after they had it - although the service manager talked some rubbish about "co-incidence" and how he personally tested the radio. Any help from you guys (and girls) would be greatly appreciated. info: The car is a Focus Titanium '06, bought from Evans Halshaw last year. Speakers worked fine before (blummin' beefy I'd say), and now no sound/vibration at all from the woofers I'm a student, so I couldn't personally pick the car up, not that I would have thought to check the speakers if I had (my parents did notice a scratch which, after some arguing with the service manager, they got sorted) Any more info needed, just let me know. Edit: I'm fine with lookin' under the bonnet and fiddling with basic stuff, as long as I'm given good instructions. No idea where to start, so thought I'd better seek out some real people with real knowledge.