Audio Authority Car Audio System installation manual Amplifier Product Groups, Amp Sharing

Sub

Amps

Head Unit Low-Level Bus

	Dedicated EQ
Low-Level	916X
Buses
980	942

Front

Amps

Amplifier Product Groups

The low-level outputs of products in the Processor/EQ/Crossover group are connected to the next logical component in the signal path, the Amplifier Product Group. Generally, amplifiers come in two different varieties; those that have low-level and high-level inputs and those that only have high-level inputs, normally called “boosters.” These two types of amps require different switching modules and belong in different Product Groups. If there are no booster-amps in your display, then you probably want to divide the amplifi- ers you wish to display into Front-channel amps, Rear-channel amps, and Subwoofer amps (see example in Figure 8).

Many of today’s amps have multiple inputs and outputs such as 4-channel amplifiers with Front Left/Right-INs/OUTs and Rear Left/Right-INs/OUTs. There are 6-channel amplifiers, most with their own internal crossovers, and amplifiers that can be specially configured, depending on how you hook them up (e.g. Front L/R Stereo IN/OUT, Rear bridged in mono for Subs).

916X

942

Rear

Amps

916X

942

When planning for demonstrating these
multichannel amps, you will need to	Front	Sub
support each L/R input to the amp, and	916X	916X
each L/R output from the amp.		PSBs
	942	Front/Sub
So, a 4-channel amp could be used as		942
shown in Figure 9. The Front L/R Input		Input
signal would come from the Processor/EQ
Product Group to the Front amplifier
Product Group’s Model 942 Amplifier
Selector through the Front Low-Level Bus.
The amplifier in position #1 receives the
front input L/R signal through the 942 Amp
Module and sends its front output L/R		Output
signal back through the 942 in the Front
	Figure 9. 4-channel amplifier switching
Amp Product Group. The Sub input signal
	(Front/Rear or Front/Sub).
in this example passes through position #1
on the 942 Amp Selector for the Sub Amp
Product Group. The High-Level Bus
then passes the signals on to the Front	916X
and Sub speaker groups.

Figure 8. Dedicated EQ and Front/	Amp Sharing	942
	It is sometimes desirable to have 2-
Rear/Sub Amp Groups.
	channel or 4-channel amplifiers
	available to play in more than one	Front

Product Group. For example, you may wish to show the same amplifier driving a Front, Rear, or Sub speaker group. This method of demonstration lowers your display inventory investment and con- serves space.

The Access™ System allows the user to share an amp in different Product Groups. To achieve “Amp Sharing”, one must use a Model 942 for each Product Group that the shared amp will appear in. Also, the amp must receive an input signal from the processor’s output for each source or source unit group (see Figure 10). There are several ways to set up amp sharing systems, so call Audio Authority at 800-322-8346 with questions.

942	942
Rear	Sub

993 Model 993

Amp Sharing

Adapter

Shared

Amplifier

Figure 10. One shared amp may be selected for front rear or sub positions (see Appx. B p. 48).

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