MACKIE Big Knob Passive

The Mackie Big Knob Passive Studio Monitor Controller lets you switch between two pairs of sources and two pairs of studio monitors or amplifiers. Plus it includes one line input for connecting to mobile phones or other music players. The driver supports both 6.3mm symmetrical and asymmetrical jack connectors (TS/TRS). On its body you will find mono, mute and dim switches. Mono converts the sound to a mono signal on both left and right channels, mute instantly mutes the signal to zero and dim reduces the volume by 20 dB. Another advantage of this driver is that it requires no power supply.