iSwitch is a unique precision piece of test equipment, being able to individually send a choice of two program sources to 12 pairs of powered loudspeakers, making it ideal for batch testing or demonstrating.Its ultra low noise figures come from extensive use of premium components, plus care and attention to board design and layout. The result is superb, transparent audio quality and the headroom to accurately reproduce the most demanding input signal. A and B Input gains are adjustable from Off through to +6 dB via level controls on the front panel. LED status indicators show which input is currently active.