USER MANUAL
i - S E R I E S
i - S E R I E S
a d v a n c E d a m p l I f I E R S
P.13
In 1
In 2
iD4
In 1
In 2
iD4
180°
180°
3 INST
ALLA
TION
3.7.2 Dual Channel Operation
Two fully independent amplifier channels (“Stereo” – normal operating
mode).
Z
min
= 2 Ω for Dual Channel operation
3.7.3 Mono Bridge Operation
One-channel mono bridged operation.
Z
min
= 4 Ω for Mono Bridge operation
In this mode the channel 2 amplifier stage processes the identical input
signal than channel 1, but with reversed phase. The channel 2 input signal
is not used / ignored.
The loudspeaker load must then be connected between the two posi-
tive channel outputs (pin 1+ and pin 2+) using a specially configured
SPEAKON
®
connector / cable. This effectively doubles the maximum out-
put voltage. But please note that this also doubles the minimum allowed
loudspeaker impedance Z
min
.
!
WARNING!
In Mono Bridge Operation RMS output voltages can be as high as
200 V
AC
.
Wiring to the speaker loads must conform to NEC class 3 safety stand-
ards or its equivalent that meets all national and local electric codes. All
customer specific cables may only be manufactured by qualified suppli-
ers / personnel. All cabling or rewiring work must be carried out by quali-
fied personnel.