The speaker in the left door has developed a ‘rattle’ that has become very noticeable, particularly in sympathy with base notes. I checked the speaker and indeed the speaker fabric is damaged & I assumed that was the problem so I swapped it with the back door speaker and prioritised the sound to the front speakers to minimise the effect. But that didn’t help all that much and putting my ear to each of the 4 door speakers I could hear they were all producing this ‘rattle’ sound so it seems to be a result of the amplifier output rather than the individual speaker/s. Has anyone got an idea of what’s going on & are there any cures for this malady ?