New Features

For the first time at BMW, binding audio standards have been defined for the E85 which will also be adopted in successor models. In addition to the minimum requirements relating to the systems, Carver speaker technology is used for the first time worldwide in a motor vehicle (Top-HiFi audio system). This system achieves substantial improvements in the low frequency range.

The audio standards stipulate the following requirements:

• Classification in 2 audio systems: HiFi and Top-HiFi
• Symmetry of sound field: All systems ensure uniform distribution of the sound field in the vehicle and convey the overall acoustic impression that the source of the music is in front of the driver and passenger.
• Sound pressure
• Linearity of stereo signal

With the aid of the Carver speaker technology, high sound pressures can be achieved although there is only a low resonance volume (space behind the speakers) available in the roadster.