Mackie Professional Audio
Big Knob, Monitor Control

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Mackie Big Knob

Model: Big Knob
Desktop Level Control / Monitor Switcher / Talkback Box

You asked for it. Your band asked for it. Your clients asked for it. Your mom practically asked for it.

Since the dawn of computer-based music making, folks have longed for a simple monitor switching and level control box with built-in Talkback functions. You know, something that sits right on your desktop, letting you easily switch between sets of studio monitors and different stereo sources. And send musicians custom headphone mixes while you communicate with them via a built-in Talkback microphone. Your wish is our command...


Introducing The Big Knob
The Big Knob is a simple yet powerful desktop audio control center that lets musicians and engineers get right to the business of making music in four major ways: Level Control, Studio Monitor Selection, Input Source Selection and Talkback & Headphone Control.

Precise Level Control
Using a big, convenient volume knob, Big Knob lets you adjust volume levels the way our ancient audio ancestors (Analogus Engineerus) did - with a simple, intuitive knob, not with a mouse and screen. The end result is a higher degree of precision and much quicker level adjustments.

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.

Sound Quality
Because Big Knob plays a crucial link between recording output(s) and studio monitors, we placed the utmost importance on pristine, no-compromise sound quality. For this reason, Big Knob features ultra low-noise op amps, extremely low-tolerance components and state-of-the-art surface mount technology. All of this ensures superb sound in critical listening environments and long-term reliability - even under daily, and nightly, studio use.

  • 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 turntable

  • 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

  • Humorous product name ensures years of off-color studio humor

General Specifications
Frequency Response: Line-level Inputs and output: +0, -1 dB, 10 Hz to 50 kHz / +0, -3, 5 Hz to 100 kHz
RIAA Equalization Deviation (Phono Input): ±0.5 dB from 20 Hz to 20 kHz
Distortion: Line-Level Inputs to Line-Level Outputs ( unity gain): >0.015%, 20 Hz to 20 kHz @ +4 dBu
RIAA Input, Nominal Gain: >0.015%, 20 Hz to 20 kHz @ +4 dBu
Noise Floor: (20 kHz Bandwidth, +4 dB Level setting, 150Ω source)
Unity Gain, with DAW, 2-Track A, and 2-Track B Assigned: -86 dBu Maximum (all outputs)
Monitor A, B & C Outputs, Studio Output, DAW, 2-Track A & 2-Track B Outputs: -90 dBu Typical
Phono Input ( nominal 41.8 dB gain @ 1 kHz, inputs shorted): -71 dBu max (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 dBu level Setting)
34 dB minimum
40 dB typical
Crosstalk: Adjacent Input: 90 dB @ 1 kHz
Left to Right/Right to Left: 70 dB @ 1 kHz
Muted/ Level Off: 90 dB @ 1kHz
Trim Control Range: Input Trim Control ( Center Detented): ± 10 dB
Output Trim Controls: -14 dB to 0 dB
Dim Switch: 0 dB/-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 (+4 dB Level Setting): +4 dB/+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 @ 100Ω)
DAW Phone Mix Input to:
Phones Amp Outputs: 14 dB
Studio Output: 24 dB
Phones 1 and 2 Outputs: 24 dB (output loaded @ 100kΩ)
Phono Input @ 1 kHz to:
Monitor A, B, and C Outputs: 67.8 dB
DAW, 2-Track A, 2-Track B, and Phones Amp Outputs: 57.8 dB
Studio Output: 67.8 dB
Phones 1 and 2 Outputs: 67.8 dB (output loaded @ 100 kΩ)
Line Impedance: Line Input: 24 kΩ balanced/ 12 kΩ unbalanced
Phono Input: 47 kΩ || 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)
AC Power Requirements: US: 120 VAC, 60 Hz
Europe: 240 VAC, 50 Hz
Korea: 220 VAC, 60 Hz
Japan: 100 VAC, 50/60 Hz
Power Consumption: 25 watts
 Physical Properties: Height: 3.2 in/ 81mm (3.5 in in / 89 mm with Knob)
Width: 13.5 in / 343 mm
Depth: 5.9 in / 150 mm
Weight: 3.5 lb / 1.6 kg


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