Mackie Big Knob

The Big Knob is a simple yet powerful desktop audio control center that has the following four functions: Level Control, Studio Monitor Selection, Input Source Selection and Talkback & Headphone Control.

Monitor Selection
• When it comes to mixing, pros know it’s best to get a second, and third, opinion. So Big Knob lets you quickly switch between 3 pairs of studio monitors, or 2 studio monitors and a subwoofer, or studio monitors and a home stereo, or any other combination of powered speakers.

• Source Selection
On the input side, Big Knob lets you connect up to 4 stereo input sources at once. This means you can simultaneously connect to your computer/DAW outputs, CD player, cassette deck and even a turntable using the premium onboard RIAA preamp. You can even connect keyboards, guitars, drum machines, samplers - anything you’d like to hear - through your monitors. This makes Big Knob great for comparing your mixes-in-progress to your favorite CDs, for archiving your old LPs, jamming along to your favorite tune, and lots more.

Talkback Section & Headphone Control
• With its built-in Talkback mic and spring-loaded activation switches, Big Knob lets you quickly communicate with musicians in both the studio and tracking room - no more hand signals through the glass! Big Knob also sports two high-powered headphone outputs with a discrete headphone mix bus, solving the communications needs of most computer-based studios.

• All the Right Connections
Although its shiny silver knob is a head-turning feature, Big Knob's rear panel is equally impressive. There you’ll find three distinct Monitor outputs with individual level control; 2-Track A and 2-Track B stereo outputs with level selection switches; a DAW stereo output for your computer; a Studio output with level control; a Phones Mix input with level selection switch; 2-Track A and 2-Track B Stereo Source inputs with level control; a DAW Mix input from your computer with level control; and even a Phono input with level control for direct connection to your turntable.

• Tabletop level control / monitor switcher / source selector & talkback box
• Big, convenient volume knob for precise level adjustments
• Switch amongst 3 sets of studio monitors
• Built-in Talkback microphone for easy communication with musicians
• Monitor 4 independent Stereo inputs including one for your
• Dual Headphone outputs with independent volume controls and headphone mix bus
• Phono preamp for direct turntable connection
• High-end studio sound quality and robust construction
• Perfect for computer-based studios

Frequency Response (Line-level Inputs and Outputs)
• +0, -1 dB, 10 Hz to 50 kHz
• +0, -3 dB,S Hz to 100 kHz
RIAA Equalization Deviation (Phono Input)
• ± 0.5 dB from 20 Hz to 20 kHz

Distortion (THD & IMD) Line-level Inputs to Line-level Outputs (unity gain)
• > 0.015%, 20 Hz to 20 kHz@+4dBu
RIAA Input, Nominal Gain
• > 0.015%, 20 Hz to 20 kHz@+4dBu

Noise Floor (20 kHz Bandwidth, +4 dB level setting, 1500Ω source)
• Unity Gain, with DAW, 2-Track A, and 2-Track B Assigned: -86 dBu maximum (all outputs)
• Monitor A, B, and COutputs, Studio Output, DAW, 2-Track A, and 2-Track B Outputs: -90 dBu typical
• Phono Input (nominal 41.8 dB gain @1 kHz, inputs shorted): -71 dBu maximum (all outputs)
• Equivalent Input Noise (E.I.N.): 0.89µV / -119 dBu maximum

Dynamic Range
• Line Inputs: 112 dB minimum
• Phono Input: 93 dB minimum

Common Mode Rejection Ratio (20 Hz to 20 kHz@ +4 dB level setting)
• 34 dB minimum
• 40 dB typical

Crosstalk
• Adjacent Inputs: 9OdB @ 1kHz
Left to RightlRight to Left: 70dB @ 1kHz
Muted/Level Off: 9OdB @ 1kHz

Trim Control Range
• Input Trim Controls (Center Detented) +/- 10 dB
• Output Trim Controls: -14dB to OdB
• Dim Switch: 0dB/-20 dB

Rated Input Voltage
• Line Inputs (+4 dB Level Setting): +4 dBu/+28 dBu (nominal/maximum)
• Line Inputs (-10 dB Level Setting): -10 dBu/+14 dBu (nominal/maximum)
• RIAA Input (@ 1 kHz, nominal gain): 5 mV/79 mV (nominal/maximum)

Rated Output Voltage
• All Line-level Outputs (+4dB Level Setting): +4 dBu/+22 dBu (nominal/maximum)
• All Line-level Outputs (-10 dB Level Setting): -10 dBu/+8 dBu (nominal/maximum)

Maximum Voltage Gain
-DAW, 2-Track A, and 2-Track B Input to:
• Monitor A, B, and C Outputs: 34 dB
• DAW, 2-Track A, 2-Track B, and Phones Amp Outputs: 24 dB
• Studio Output: 34 dB
• Phones 1 and 2 Outputs: 34 dB (output loaded @ 100 kΩ)
-DAW Phone Mix Input to:
• Phones Amp Outputs: 14 dB
• Studio Output: 24 dB
• Phones 1 and 2 Outputs: 24 dB (output loaded @100 kΩ)

-Phono Input @ 1kHz to:
• Monitor A, B and C Outputs: 67.8 dB
• Phones 1 and 2 Outputs: 67.8 dB (output loaded @ 100 kΩ)

Input Impedance
Line Input: 24 kΩ: balanced; 12 kΩ: unbalanced
Phono Input: 47 kΩ II 220 pF

Output Impedance
Line Output 300 Ω: balanced; 150 Ω: unbalanced
Headphone Output 150 Ω

Input VU Meters
• 6 Segment (OL, +8 dB, 0 dB, -4 dB, -8 dB, -24 dB)

Talkback Section
• Automatic Gain Control (AGe) Range: +/-15 dB
• Nominal Output Level: +4 dBu (+4 dB output level setting)
• Output Level Range: Off to +10 dB
• Nominal Microphone Input Sensitivity: 80 dB SPL

• AC Power Requirement
Europe 240 VAC, 50Hz

Power Consumption
• 25 watts

Dimensions and Weight
• Height 3.2 in/81 mm (3.5 in/89 mm with Knob)
• Width 13.5 in/343 mm
• Depth 5.9 in/150 mm

Net Weight 3.5lb/ 1.6 kg