Originally posted by johnchen@Mar 21 2006, 04:09 PM
Yes, this topic has been discussed many times before. The sound system of the e60 certainly does not live up to the premium brand staus fo the car. I too have considered upgrading it to something better. But the only think you can do is to change the speakers and maybe add another sub woofer. You can't change the drive unit 'cos that's part of the iDrive. You don't want to screw around with that unit.
To fit in a simple powered sub woofer in the trunk you will still need to tap the power from the battery and join to the rear speaker wires. Small operation but will immediately null your warrenty. So I end up leaving it as it is for the past one year.
Here's a small tip that will help to improve the bass of the e60 sound. Adjust the fader more towards the front speakers and you will find the bass sound a little better. I set mine 2-3 notches to the front and the bass to max. Reason is that the mid-sub woofer is hiden somewhere in the front, could be under the dash. If you set the fader to the center or to the rear the sound will be very flat. Those speakers on the rear are only 4" and the ones on the front doors are 3", all made by Nokia so go figure how good the sound can be from them.
If it makes you feel any better, the standard e60 sound system is much better thant the standard sound system fitted into the current 911 Turbo. Then again, in a 911 Turbo the only sound you''d want to hear is the wailing of the engine!!