Technical information

Macro-Tech 3600VZ Power Amplifier
Page 12
Fig. 3.5 Bridge-Mono Wiring
BRIDGE-MONO MODE
Macro-Tech 3600VZ
CH-2 OUTPUT CH-1 OUTPUT
INPUT INPUT
CH-2 CH-1
PUSH
FX
PUSH
CH-2 CH-1INPUTS
(MONO)
STEREO
BRIDGE
MONO
PARALLEL
MONO
STEREO
BRIDGE
MONO
PARALLEL
MONO
CAUTION: TURN OFF AMPLIFIER
BEFORE CHANGING THIS SWITCH!
MIXER
–
+
LOUDSPEAKER
DO NOT USE
CHANNEL 2
INPUTS.
DO NOT
USE BLACK
BINDING
POSTS.
USE ONLY CHANNEL 1 INPUT
3.3.2 Bridge-Mono Operation
Bridge-Mono mode is intended for driving loads with a
net impedance of 4 ohms or greater. (See Parallel-
Mono if the load is less than 4 ohms.) Installing the
amplifier in Bridge-Mono mode is very different from
the other modes and requires special attention.
To put the amplifier in Bridge-Mono mode, turn the
amplifier off and slide the Stereo/Mono switch toward
the right (as you face the back of the amplifier). Both
outputs receive the signal from Channel 1 with the out-
put of Channel 2 inverted so it can be bridged with the
Channel 1 output. DO NOT USE THE CHANNEL 2 IN-
PUT or the signal level and quality may be greatly de-
graded. Keep the Level control of Channel 2 turned
completely down (counterclockwise).
Note: The input jack and level control for Channel 2 are
not defeated in Bridge-Mono mode. Any signal fed into
Channel 2 may work against and add to or distort the
signal in Channel 1.
Connect the load across the Channel 1 and 2 red bind-
ing posts with the positive lead from the load attaching
to a red post of Channel 1 and the negative lead of the
load attaching to a red post of Channel 2 as shown in
Figure 3.5. THE TWO BLACK BINDING POSTS ARE
NOT USED AND SHOULD NOT BE SHORTED. The
load must be balanced (neither side shorted to
ground).
CAUTION: Be certain all equipment (meters,
switches, etc.) connected to the mono output is
balanced. To prevent oscillations, both sides of the
line must be isolated from the input grounds.