Mackie Big Knob Studio Command System [monitor switching & level control box letting], 2005, made in China

Link: Manual PDF | soundonsound

Specifications

Frequency Response
Line-level Inputs and Outputs:
- +0, –1 dB, 10 Hz to 50 kHz
- +0, –3 dB, 5 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 @ +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, and C Outputs, 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.): 0.89 μV / –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: 90 dB @ 1 kHz
Left to Right/Right to Left: 70 dB @ 1 kHz
Muted/Level Off: 90 dB @ 1 kHz

Trim Control Range
Input Trim Controls (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 (+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 @ 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)

Input 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)

Talkback Section:
Automatic Gain Control (AGC) 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
U.S. 120 VAC, 60 Hz

Europe 240 VAC, 50 Hz

Japan 100 VAC, 50/60 Hz

Korea 220 VAC, 60 Hz

Power Consumption: 25 watts

Physical Dimensions:
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: 3.5 lb/ 1.6 kg