From the manual:
Level Controls
Individual controls are provided for the MID and HIGH frequency ranges, and when set at "0" a suggested output characteristic is obtained. Turning either control clockwise increases the output from that speaker, while turning fully counterclockwise reduces the output signal to zero.
Level Controls
Individual controls are provided for the MID and HIGH frequency ranges, and when set at "0" a suggested output characteristic is obtained. Turning either control clockwise increases the output from that speaker, while turning fully counterclockwise reduces the output signal to zero.