CONFIGURING THE A 21 FOR BRIDGED MONO OPERATION
6
YOU SHOULD KNOW
IMPORTANT! - Before Trying Bridged Mono
You should not connect a speaker with an impedance of less than 8
Ω
to the A 21 when it is
configured for bridged mono operation. Refer to
Bridged Mono Operation
in the
Technically
Speaking
section for additional information about. Use the right channel Gain control to
adjust level in the bridged mode.
1
2
3
6
4
5
7
8
Speaker
7
6
4
5
8
8
2
3
8
1
Right
Left
Components
Surround
Sound
Controller
Preamp
OUTPUTS
In certain applications, you may require your A 21 to power a single 8
Ω
sp
eaker by
using its bridged mono feature. In most instances, you won’t use the A 21 this way and
you can skip this section.
What You’ll Need:
• One length of speaker wire with banana plugs, spade lugs, or bare wires
• One shielded balanced or unbalanced interconnect cable for each A 21 used
in bridged mono
• One loudspeaker with an impedance of 8
Ω
or higher
Before Connecting
Remove power to all the components in your audio system.
Set the A 21
Stereo - Mono Bridge
Switch to its
Mono
(up) position.
To Connect:
From the Source
Plug one end of the interconnect cable into the
Balanced
or
Unbalanced Right
Channel & Mono Input
jack on the A 21
Plug the other end of this cable into the desired output channel on the preamplifier
or surround controller.
Do not make any connection to either
Left Channel Input
jack on the A 21.
To Connect:
To the Speaker
Insert the wire with the ridge or other marking into the red
Right
+
(positive) speaker
terminal on the A 21. (This is the positive speaker terminal in bridged mono.)
Insert the wire without the ridge or other marking into the
Left
+
(positive) speaker
terminal on the A 21. (This is the negative speaker terminal in bridged mono.)
Insert the wire with the ridge or other marking into the red + (positive) terminal on the speaker.
Insert the wire without the ridge or other marking into the black -- (negative) terminal
on the speaker.
Do not make connections to either of the
A 21's black speaker terminals.
