Filter
Top Products
13
© 2003 Directed Electronics, Inc
The Directed 1200/5 channel five
subwoofer section can be combined with
a 750d in a master/slave combination
for increased power and accurate level
matching. They are the Parallel Synced
Gain and External Synced Bridged combi-
nations.
NOTE: The Directed 1200/5 is always the master amplifier
in these combinations.
Parallel Synced Gain
The Parallel Synced Gain combination
includes a master amplifier and a slave
amplifier.
In this master/slave combination the
master amplifier’s pre-amp controls
remain active and the slave amplifier’s
pre-amp is bypassed. This allows the
master amplifier to control gain, filter,
and sub-level on both amplifiers.
The Parallel Synced Gain combination
allows the amplifiers to drive their own
separate subwoofer(s) while being
synced together via an in-phase audio
pre-amp signal from the master amplifier.
Woofer wiring connections to the ampli-
fier subwoofer outputs in this combina-
tion should be standard in-phase configu-
rations, creating a parallel speaker
combination. (Refer to
Parallel Synced
Gain
section of this guide for amplifier
and speaker connection diagrams.)
External Synced Bridged
The External Synced Bridged combination
includes a master amplifier and a slave
amplifier.
In this master/slave combination the
master amplifier’s pre-amp controls
remain active and the slave amplifier’s
pre-amp is bypassed. This allows the
master amplifier to control gain, filter,
and sub-level on both amplifiers.
This combination allows the amplifiers to
drive common subwoofer loads while
being synced together via an out-of-
phase audio pre-amp signal from the
master amplifier. In this wiring configura-
tion the master amplifier sends the posi-
tive signal to the speaker while the slave
amplifier sends the negative signal,
making an externally bridged speaker
combination. (Refer to
External Synced
Bridged
section of this guide for ampli-
fier and speaker connection diagrams.)
Combined Amplifiers Gain
and Filter Settings
Set the Subsonic, EQ, and other filter
settings on the master amplifier to the
positions that achieve the best sound
quality. Follow the adjustment guidelines
discussed in the
Crossover and Gain
Adjustment
section of this guide.
COMBINED AMPLIFIERS