ISP Technologies CS 650 - 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 CS650 Surface Mount Speaker.
The speaker receives power and audio over a Cat5 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, equalized and fed to a switch selectable loudness
circuit which boosts the high and low frequencies in the audio signal and then to a D-
CAT power amplifier circuit to drive both the woofer and tweeter of the speaker. The
CS650 speaker also includes a remote level port, which allows for remote level
adjustment using ISP Technologies RM10, RM20 or RM20I. Note: The CS650 ships
with a RJ45 Jumper plug inserted in the Remote Level Port, This jumper is
required for audio if no remote level control is used. If connecting to a RM20
or RM20I remove this jumper and connect the desired remote level control.
The HDDS CS650 includes a front mounted blue power indicator LED, which illuminates
when the amplifier module power is on.