E85 Information/Communication
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Audio systems
Introduction
- Systems
The various audio systems of the E85 are described in this
technical documentation.
The following audio systems are available for the E85:
- Stereo audio system
- HiFi audio system
- Top-HiFi audio system
- New features of systems
New features compared to previous BMW developments
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 3 audio systems: Stereo, 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.
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