Audio measurements can be made quickly and easily with Gold Line Audio Test Sets. The TS1 incorporates the three most commonly needed functions for calibration and alignment procedures. Included is a true sine wave oscillator allowing a full single range sweep from 20Hz to 20kHz, a dual use frequency counter and a wideband average responding AC voltmeter displayed as dB. The Model TS1RMX incorporates these functions in a standard rack mounted configuration with 3 pin XLR connectors and the Model TS2 adds an impedance measuring function for components, loudspeakers and loudspeaker systems.