BMW Audio Upgrade Bronze If you own a BMW will be amazed how good your car can sound. Most BMWs come with 6-inch sub speaker under the seat and 4″ speakers that are in the front doors. If your lucky you may have a door tweeter, Because of the way the system is designed the car original system could have sounded good but the speakers were underpowered and not of the best quality.
We have put together a few solutions. Bronze upgrade package This upgrade will help the original speakers sound better as the amplifier in the radio is underpowered, even if you replaced the speakers with better ones, you would not get the benefit of how good the speakers would sound because the new speakers would be underpowered as well. Alpine 4 channel amplifier fitted £399.