The Trident Audio Developments Hi-Lo 500 is an adaptive lowpass/highpass 500 Series frequency filtering module that dynamically responds to input signals, providing a level of control and signal enhancement unavailable in other modern signal processors. Compatible with any approved 500 Series chassis, the Hi-Lo 500 also offers special functionality when installed in the API Radial Workhorse rack, courtesy of an onboard jumper that routs signals directly to the Workhorse mix bus. This can be combined with the Hi-Lo 500’s stereo link switch and a second Hi-Lo module to enable stereo deployment and linked stereo tracking. By actuating the Track Signal switches on both Hi-Lo modules and setting the Frequency controls identically, the left and right signals will be summed and automatic tracking will follow both the left and right signal sources.