About The Pro-Sys Speaker Control Unit

It's generally accepted throughout the pro audio industry that a well designed, dedicated speaker processor or control unit is the best way to get reliable, repeatable performance from speaker systems with the minimum of time consuming pre-show setup and adjustment.
However, up till now this kind of control has been reserved for active multi-amped high end concert systems.
Now ARX brings state of the art processor control to smaller, passively crossed over systems.
ARX has had 20 years of experience designing and manufacturing processor controlled loudspeaker systems. The dual channel Pro-Sys supplies EQ trim, phase correction, sub crossover, and ISC™ speaker protection, neatly fitted into a one rack unit package.

Controls
The front panel has status LEDs for Signal Present and ISC Protection for all three channels, plus a Sub Enable switch and associated level control.
The rear panel has Balanced XLR Inputs and Outputs for Channels A and B, as well as a separate Sub output, plus extra ISC connections to the system power amps.
Also on the rear is a switch so that Channel A can be used with a Sub (say for FOH) while Channel B can run full-range (say for monitors).
This allows an extremely cost effective system to be put together.

What is ISC?
ISC™ (Interactive System Control) is our innovative speaker protection circuitry, and constantly monitors the amount of power the amplifier is delivering to the speakers.

Since the Pro-Sys is factory calibrated for ARX loudspeaker systems, it knows their exact Safe Operating Area (SOA). If it senses that a peak in amplifier power is about to exceed this SOA, it automatically triggers the system protection circuits to hold the level momentarily at the loudest safe setting until the power peak has passed.
The rear panel has Balanced XLR inputs and outputs as standard, The Pro-Sys is placed last in the system chain before the power amps, usually in the amp rack. Once it has been connected up correctly, it needs no readjusting. Just set it and forget it - the Pro-Sys looks after the rest!

To ISC Application Notes