Extron electronic XPA2001-70V, XPA1002 Controlling Multiple Amplifiers with One Volume Controller

Controlling Multiple Amplifiers with One Volume Controller

Several XPA 1002 and XPA 2001 units can be daisy-chained so that one volume controller can simultaneously regulate the volume of all the amplifiers.

NOTES: • As additional amplifiers are added to the daisy chain, the sensitivity of the volume potentiometer will change. The maximum volume level (fully clockwise) will not be affected. However, the effectiveness of the minimum volume level (fully counterclockwise) in reducing the volume to inaudible

levels decreases as more amplifiers are added to the daisy chain.

•When more than two XPA Half-Rack units are attached to the chain, sound may be heard even if the levels have been set to their lowest. The muting of the output, however, can be remedied with a contact closure button attached between the Vol/Mute and the Ground pin of the first

XPA Half-Rack unit in the chain.

To regulate multiple amplifiers with a single volume controller:

1.Attach all three pins of the volume controller to the corresponding pins on the first

XPA Half-Rack unit only — Ground to G (ground), Vol/Mute to C (Vol/Mute), and 10 V to V (10 V).

2.Use jumper wires to connect the C (Vol/Mute) pins of the first amplifier and each successive amplifier.

3.Use jumper wires to connect the G (ground) pins of the first amplifier and each successive amplifier.

Extron

VCM 100 AAP

VOL/ MUTE 10V

	REMOTE
	G STANDBY
10V	50mA
V	C G

Extron

XPA Half-Rack daisy chain

	REMOTE
	G STANDBY
10V	50mA
V	C G

	REMOTE
	G STANDBY
10V	50mA
V	C G

or

10V		50 mA	10V		50 mA	10V		50 mA
	VOL/MUTE			VOL/MUTE			VOL/MUTE

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

STANDBYSTANDBYSTANDBY

Figure 9. Regulating Multiple Amplifiers with a Single Volume Controller

NOTE: The 10 V pin of the volume controller connects to the first XPA Half-Rack unit only. There are no jumper wires linking it to subsequent amplifiers.

XTRA Series • Operation 18