Hi,

I have a B&O sound system upgrade in my Focus ST and really enjoy listening to music in the car but everytime I am playing my music through apple music certain songs are causing a really annoying rattling noise to come from the speakers or the side unit on the door panel. I have been looking everywhere to find out what the problem could be or where the rattling is coming from when I am playing the music but I am unable to locate it. 

HAs anyone else had this problem before? I am keen to pretty much stop it all together because I really like to enjoy a good song while driving to my destination but when I hear the rattling it just ruins the experience and the song for me.

My MK4 used to hate "Come Together" (Low "D"), used to shake the door casings to bits

Take the door casings off, make sure nothing on the door or on the door casing is loose

Stick some foam packing between speaker rim and the door casing when refitting to stop the vibration

aside from components moving and a physical rattle  - driving speaker cones too hard can cause the speaker to clip - clipping is the term used to describe the nasty deadly crashing of the speaker magnets in to their end stops - it then gives the coil no respite or anywhere to hide from the abuse (the other part that creates the electromagnet), so the coil can burn out and the speaker dies, or the repeated abuse just leaves the speaker as a unit worn out and its never quite the same again

the solution every time is never more powerful speakers - this just brings the problem earlier, and at lower volume levels - because the pathetic amp is already making up how to control the speakers - this is what creates clipping - the correct way forward is a significantly better and more powerful amp - the power gives the system the ability to drive the speaker cones in a controlled manner - making cheap speakers sound great and go much louder, with real clarity

the pathetic amp in virtually every system made - is out of its depth and the speakers out of control after 30% of the vol knob travel is used - in our silly minds we still wind to 55% and pretend the damaging vol level of utter mush and muddled sound is better...  whilst the system shouldn't self destructs  at 55% - its sound quality has dropped off massively and the damage starts on your ears instead

when you buy a decent amp and drive speakers properly, the quality comes back - you'll either get more hearing damage as it goes far louder - or hopefully it sounds way better and you'll enjoy a bit of hearing damage using 45% of its noise level for a few more years, till your ears let you know you messed them up - with tinnitus

100 watt amp + 20 watt speakers = great system, far better sound, lasts forever
20 watt amp + 100 watt speakers = distorted mess, muddled mush turns up before sufficient volume reached, amp always working outside its capability & the speakers can die

 

I have the same issue in my Focus ST X line with B&O, the passenger door is fine but the drivers door has a vibration with certain music.

I had a similar issue with my wife's Mondeo Vignale, I took the door panel off and found that the clear plastic tubes which light up the door where rattling so I added some cloth tape to firm them up and the vibrations stopped, 

If you take the panel off, and start tapping you should find out what's rattling, annoying problem, if you find out what it it let me know.

 

Yeah, same issue here. Drivers doors as well. 2023 ST X Estate