Whirlwind 8-Channel Mic/Line Switcher, DB25 Connector Whirlwind 8-Channel Mic/Line Switcher - Whirlwind 5 Year Warranty Eight channels of balanced A-B switching for line or mic level audio or MIDI signals Each of the eight channels can be individually switched or assigned to a Master Control circuit Master control through front panel pushbuttons, footswitch or automatically triggered by loss of signal on channel one A input