Shown model 222.0 |
N40/3 | Sound system amplifier control unit |
P82.62-3922-06
Location
The sound system amplifier control unit with code 811 (Advanced sound system) is shown in the picture at the bottom right, and it is located in the trunk on the left behind the paneling on a major assembly carrier.
Tasks
The sound system amplifier control unit has the following tasks:
Receive signals
Signal optimization and amplification
Transmitting signals
Receive signals
The sound system amplifier control unit receives the following signals:
Voltage supply
Muting of the audio sources (from the emergency call system control unit (N123/4) (with code 348 (Emergency call/assist system))
Muting of the audio sources (from the HERMES control unit (N112/9) (with code 351 (Emergency call system (HERMES)))
Visual and electrical wake-up
Control and audio signals over the Media Oriented System Transport (MOST) from the COMAND controller unit (A40/3), from the Rear Seat Entertainment system controller unit (A26/18) (with code 864 (Rear Seat Entertainment system)) or from the tuner unit (A90/4) (with code 536 (SIRIUS satellite radio), with code 537 (Digital radio (DAB)) or with code 865 (TV tuner))
Signals of the interior noise level from the hands-free system microphone (A67b1) via MOST from the COMAND control unit, for speed-dependent volume control (SDV)
Speed signal via MOST from the COMAND control unit, for SDV
Signal optimization and amplification
Optimization of input signals by means of digital signal processing and high-quality sound optimization algorithms (Surround Sound, Easy Listening, Live, 3D sound)
Support of stereo and multichannel entertainment channels and announcement channels (e. g. for voice output in voice control system or navigation prompts)
Amplifying of the input signals and assignment of the output to the speakers
Transmitting signals
The sound system amplifier control unit sends electrical signals to the following components for audio output:
Left footwell woofer (H4/42)
Right footwell woofer (H4/43)
Left front door tweeter (H4/68)
Right front door tweeter (H4/69)
Left rear door tweeter (H4/70) (model 222) or left rear sidewall cover tweeter (H4/104) (model 217)
Right rear door tweeter (H4/71) (model 222) or right rear sidewall cover tweeter (H4/105) (model 217)
Left front door midrange speaker (H4/72)
Right front door midrange speaker (H4/73)
Center instrument panel tweeter (H4/76)
Center instrument panel midrange speaker (H4/78)
Left rear door midrange speaker (H4/80) (model 222) or left rear sidewall cover midrange speaker (H4/102) (model 217)
Right rear door midrange speaker (H4/81) (model 222) or right rear sidewall cover midrange speaker (H4/103) (model 217)
Left front door woofer/mid-range speaker (H4/86)
Right front door woofer/mid-range speaker (H4/87)
Left rear surround sound system tweeter (H4/92)
Left rear surround sound system midrange speaker (H4/93)
Right rear surround sound system tweeter (H4/94)
Right rear surround sound system midrange speaker (H4/95)
Headliner tweeter (H4/96) (model 222) or center console tweeter (H4/108) (model 217)
Headliner midrange speaker (H4/97) (model 222) or center console midrange speaker (H4/109) (model 217)
Left rear door woofer/mid-range speaker (H4/98) (model 222) or left rear sidewall lining woofer/mid-range speaker (H4/100) (model 217)
Right rear door woofer/mid-range speaker (H4/99) (model 222) or right rear sidewall lining woofer/mid-range speaker (H4/101) (model 217)
Overhead control panel tweeter (H4/110)
Subwoofer amplifier (N40/9), for subwoofer (H4/38)