Crackerling BOSE Speaker

I got my car last July (Audi S3 2001 with BOSE) and then after about a week I noticed the front passenger speaker was not working.

I took the door card off to find there was not a speaker there! After months of looking on ebay and asking here for a front boase speaker I finaly got a pair from ebay.

So I fitted one and all seemed good for about 1 - 2 months now at low volume you can here the speaker crackerling/vibrating

You cant here it so much on music or if the sound it turned up quite high but you can here it more when people are talking on the radio with music in the backround

Like on Radio 1 news becuase they backing music is quite bassy it sounds bad then

Do you think it's my speaker or possibley the bose amp I here they can cause a few problems


Thanks

Dan

cool any ideas were I could get my hands on a 2nd hand bose amp or is there anyway to bypass it and use another amp thats better