Audio Authority Car Audio System Definition of Terms, What is the Access System?

Left

Speaker

Switching

Module

SPEAKER BUS

What is the Access™ System?

The Access™ System consists of a variety of intelligent switching modules. These modules communicate with each other via the “system bus,” allowing you to construct the exact demonstration system configuration you desire from the sources, processors/equalizers, amplifiers, speakers, and subwoofers in your display. The switching modules are located near the actual products on display creating a “distributed switching net- work.” The products are connected to the modules rather than being wired to one central point. Selected product signals are then sent across the network through “buses” that interconnect the modules. A simplified view is shown below.

Figure 1.

Control

Panel

Remote

Control

CONTROL PANEL CABLE

	Source		System
	Switching
			Module
	Module
Product
Select
		LOW LEVEL BUS
Button

SYSTEM BUS

Amplifier

Switching

Module

Right

Speaker

Switching

Module

DEFINITION OF TERMS

To successfully install your new Access Demonstration Network, you should familiarize yourself with the following terms:

Address	A number that pinpoints the identity and location of a
	switch module within a system. The installer sets numeric
	switches like the ones in Figure 2 for each module which
	provides a unique address in the proper sequence for each
	component connected to the system.	Figure 2. This example shows an
AutoDamping™	When merchandising many pairs of different speakers in a	address setting of 0/00. Typically
		this would represent the first
	showroom, the drivers of the unselected speaker pairs	module (components 1 through 4)
	become passive radiators when the currently active	in the Source Product Group.
	speaker pair is playing, absorbing much of the sound
	coming from the speakers being played. AutoDamping™ is a circuit in the Model 932 that
	electrically disconnects (shorts) speakers not being played, thereby automatically damping
	them as passive radiators and improving sound quality in the showroom.
Bus	A Bus is a pathway for signals to travel from module to module; a cable connecting
	modules. There are three types of buses found in most AccessEZ Systems:

•System Bus A four wire harness (red, black, yellow, blue) connected to every AccessEZ module. The System Bus carries the signals that control the selection of the components and perform various housekeeping functions among the modules in the system.

•Speaker Bus (or High Level Bus) A four wire harness (green, white, brown, gray) that carries speaker-level signals from source and/or amplifier modules to speaker modules.

•Low-level Bus A signal bus using RCA patch cables to carry low-level audio signals between source modules and equalizer or amplifier modules.

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