Mackie Big Knob Studio+ 4x3 Studio Monitor Controller.

Active Monitor Controller:

• For up to three monitor pairs and four stereo sources integrated 2x4 USB audio interface 24-bit / 96 kHz
• Large volume control
• Switches for mute, dim, mono, monitor and signal source
• Independent trim for all sources and monitor outputs
• Cue mix function
• Integrated talkback microphone
• 16-Segment LED metering
• +48 V phantom power
• 2 Mic/line XLR/jack 6.3 mm combo inputs
• 4 Line inputs: 6.3 mm jack balanced
• 6 Monitor outputs: 6.3 mm jack balanced
• 2 Stereo headphone outputs: 6.3 mm jack
• 1 Stereo line input: 3.5 mm mini jack
• 2-Track connection: 6.3 mm jack (L/R)
• Talkback microphone input XLR with footswitch connection 6.3 mm jack
• USB connection
• iOS support with optional Lightning to USB 3.0 camera adapter for connection to iPad and iPhone (adapter not included)
• Power supply connection
• Steel housing
• For PC and Mac
• Dimensions: 302 x 173 x 81 mm
• Weight: 2.1 kg
• Includes Tracktion Waveform Recording Software