ISP Technologies SB 112 - Manual (Page 4)

OPERATION
The HDDS Master Control Module is the Master control center for distributed sound
systems using the HDDS technology. The Master Control Module includes six zones
that can be used independently or can be linked to work together allowing the system
designer the flexibility to set up any system with the desired configuration. The block
diagram below shows the basic configuration of the HDDS SB112 Wall Mount
Subwoofer. The subwoofer receives power and audio over a CAT6 cable connected to
the Master Control Module, internally converts the AC power to plus / minus 15VDC and
30VDC to power the amplifier. The audio signal is fed to a precision differential
amplifier to remove any common mode noise, filtered with a crossover circuit to
produce a low pass and high pass signal, equalized and fed to D-CAT Dynamic Adaptive
Amplifier power amplifier circuits to drive the woofer. The woofer section will
dynamically increase the positive and negative power supply rails as required based on
the audio signal. The output swing can exceed 120 volts and can deliver over 220 watt
continuous power to the woofer. The HDDS SB112 includes a rear panel level
adjustment that allows simple balancing of installed systems.
The HDDS SB112 requires connection to the Master Control Module with CAT6 cable in
order to handle the current of the HDDS SB112. A single run of CAT6 can be used if
the cable length does not exceed 100 feet. If the required cable run exceeds 100 feet a
second run of CAT6 should be run between the Master Control Module and the HDDS
SB112 cabinet. The HDDS SB112 cabinet includes a rear panel mounted blue LED
power indicator, which illuminates when power being fed to the cabinet.
DO NOT CONNECT THE CAT6 INPUT CABLE BETWEEN THE MASTER CONTROL MODULE AND
THE INPUT OF THE HDDS SB112 SUBWOOFER WHEN THE POWER ON THE MASTER CONTOL
MODULE IS SWITHED ON! THE MASTER CONTROL MODULE MUST BE SWITCHED OFF PRIOR
TO CONNECTION. THE HDDS SB112 MUST BE POWERED ON WITH SYMETTRICAL POWER IN
ORDER TO CHARGE BOTH POSITIVE AND NEGATIVE INTERNAL POWER SUPPLIES. FAILURE TO