Shure AVC20 Stereo System User Manual


 
APPLICATIONS
(1)
Balanced Transformerless (BTL) Mode
The AVC20 has a built-in 4-way 30W amplifier system,
but by switching to BTL operation,
it
can be used as
a
2-way 6oW amplifier system.
BTL
.
. .
Balanced Transformerless
Switching
CAUTION
TURN OFF
AVCZO POWER BEFORE OPERATING
I
BTLSWITCH.
I
Adding Amplifiers in the
BTL
Mode
Adding amplifiers while in the BTL mode makes possible
the creation of a sound system with total output greater
than 120 watts.
Only use this switch when the power is off.
Set the NORMALIBTL switch to the BTL side.
Connect the speakers as shown in the diagram.
Sound is produced from the outside speaker terminals
when using the
AVC20 in the BTL mode. (The rear
"+"
speaker terminals become BTL
'I-"
speaker terminals.)
Connection
(A)
@
To use the AVC20 on the two front channels and use
the two rear channels with other amplifiers, remove the
U-shaped short pins
as
shown in the diagram.
(In order not to lose the pins, use cellophane adhesive
tape or the like to fix them to the rear panel.)
@
Connect the REAR- PRE OUT terminals to the AUX
IN terminals of the added stereo amplifier using pin
plug cables.
@
When this is done, the AVC20 volume control can be
operated, but the volume of the other amplifier must be
increased to match that of the
AVC20.