Speaker System, Basic Function - GF82.62-P-9900A

MODEL ALL (CAR) 

Overview 

This document contains information on:

• Function of the speaker system
• Restricted speaker actuation
• Actuation of the speakers during an emergency call

General 

The task of the speaker system is to output the audio information from various systems via the speakers in the vehicle. Sources for the audio information can be e.g. the radio, media or the telephone. Depending on the equipment installed, the speaker system is controlled either by the multimedia system control or by the sound system amplifier control unit.

Function of the speaker system 

Each source converts the audio information into analog audio signals. Then an amplifier amplifies the analog audio signals and transmits them to the speakers. Depending on the equipment installed, the amplifier is either integrated in the multimedia system control or is installed in the vehicle as an independent control unit.

The subwoofer amplifier is optionally used. This additionally amplifies the analog audio signals to the rear subwoofer.

Each speaker is optimized for its tasks, e.g. according to the various frequency ranges. The speakers installed differ in terms of quality, number and installation location depending on the model and equipment level.

The user can operate the volume and tone of the speaker system via the multimedia system. When an emergency call is triggered, the telematics services control unit mutes the audio sources.

Restricted speaker actuation 

During voice output, the amplifiers primarily actuate the speakers in the front area of the vehicle.

Actuation of the speakers during an emergency call 

For the emergency call system, the center instrument panel speaker is connected directly to the telematics services control unit. This means that the function of the emergency call is assured independently of the speaker system.

In addition, the telematics services control unit transmits a signal with the request for the mute function to the sound system amplifier control unit or to the multimedia system control.

	Further basic functions
	Volume adjustment to noise level, basic function		GF82.60-P-1000A
	Engine sound, basic function	Model all (CAR) with code 97B (Engine noise reduction via speakers) Model all (CAR) with code B63 (Sporty engine sound)	GF82.60-P-9901A
	Radio mode, basic function		GF82.60-P-9902A
	Media mode, basic function		GF82.60-P-9903A
	TV mode, basic function	Model all (CAR) with code 865 (TV tuner)	GF82.60-P-9904A
	Telephone, basic function		GF82.70-P-9902A
	Multimedia system control, basic function		GF82.85-P-9904A
	Emergency call system, basic function	Model all (CAR) with code 362 (HERMES LTE)	GF82.95-P-9900A
	Control units
	Sound system amplifier control unit, basic function	Model 177 with code 810 (Sound system)	GF82.62-P-9890A
	Subwoofer amplifier, basic function	Model 177 with code 853 ("Midline" sound system)	GF82.62-P-9891A