Features of the individual components Active compressor switching: · Bose patented TSM switching amplifier T

911 Electrical system 9 Features of the individual components Active compressor switching: Bose patented TSM switching amplifier This ensures precision fine tuning of the (two state modulation) dynamic range of the music. Even during loud sections, the system allows no audible These compact and high performance out- distortions. The tone is always pleasant to put stages in digital switching technology the ear. generate less heat and operate 50% more efficiently than standard linear amplifiers, as Raising the sound pressure level: these only switch on when required. They are also lighter and have a considerably To play back bass notes deep and full, suffi- longer working life. cient sound pressure must be generated. Standard solutions with huge heavy woofer Integrated signal processing: loudspeakers move the necessary large vol- umes of air. As this could not be an appro- It automatically lifts the bass tones and priate solution for a sports car, we have con- equalises the reduced sensitivity of the hu- structed made-to-measure loudspeaker man ear in the bass range at reduced vol- housings. These bass reflex technology umes. The process is significantly more dif- housings have two great advantages: ferentiating than the standard loudness con- A low convincing bass with impact in the trol. It permits a dynamic adaption of bass whole interior and avoidance of vibration, tones, so that the listener notices no change. whereby the air volume to generate the The music sounds true to life, with full, low lower frequencies is moved by so called bass tones at every volume. Voice playback resonance tubes. is natural, and the system can achieve vol- umes as in a concert hall without perceiv- With this series of technical innovate solu- able distortions. tions the BOSE sound system in the Porsche is convincing with its unique, pure and origi- nal sound.Active Equalisation: This Bose patented system is individually adapted to the interior acoustics of each Porsche and guarantees a balanced and clear tone across the whole frequency spec- trum. It creates an environment in which the lis- tener can enjoy music playback, without constantly having to re-adjust the controls. This is only possible on systems especially developed for specific cars, as acoustic measurements are taken, analysed and in- corporated during the development process. 2002 Service Information 9 - 3