Re: Crackling noise in door speakers?
Bad ground or partial short in speaker wires? I had a bad ground that would make all kinds of weird noise and crackling at low volume and went away as the volume turned up, finally the HU would power off at near full volume. After I cleaned up my ground all the problems went away, worth a shot.
Definitely replace the speakers as soon as you can.
'65 VW Bus
(2) PG Ti 12's, (2) Aura Sound 8's, (2) SoundStream 6.5 coax, (2) Alpine Type-S 6x9's [rear fill], MBQ DSC1500.1D, RF 501X
'02 BMW 330xi (AWD coupe)
Harman/Kardon 12-speaker System Option - sounds good =)