Model 74 Central Controller

General Audio

• Frequency Response: 20 Hz-20 kHz ±0.1 dB (down 0.5 dB @ 60 kHz), monitor outputs
• Distortion (THD+N): 0.04%, measured at 1 kHz, +4 dBu, monitor outputs
• S/N Ratio: 87 dB, ref +4 dBu out, 20 Hz-20 kHz, monitor outputs
• Crosstalk: 78 dB, typical, ref +4 dBu in, 20 Hz-20 kHz, monitor outputs

Audio Inputs

• 16, organized as two 6-channel "5.1" inputs and two 2-channel "stereo" inputs
• Type: electronically balanced, compatible with balanced or unbalanced sources
• Impedance: 24 k ohms
• Nominal Level: ・2 dBV to +6 dBu, adjustable
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• Level Calibration: 15-turn trim potentiometers

Monitor Outputs

• 2, 6-channel
• Type: electronically balanced, compatible with balanced or unbalanced loads
• Maximum Level: +27 dBu into 10 k ohms, +26 dBu into 600 ohms

Talent Amplifier Output

• Compatibility: provides power and audio signals for up to four Model 35 Talent Amplifiers
• Type: DC power with two channels of unbalanced audio
• Connections: common on pin 1, DC (+27 V nominal, 200 mA maximum) modulated with channel 1 audio (・0 dBu nominal) on pin 2, and channel 2 audio (・0 dBu nominal) on pin 3
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Line-Level Cue Output

• 1, stereo
• Nominal Level: +4 dBu, nominal
• Type: electronically balanced, capacitor-coupled, intended to drive balanced or unbalanced loads of 600 ohms or greater
• Source Impedance: 100 ohms, nominal
• Maximum Level: +20 dBu into 10 k ohms

Line-Level Talkback Input

• Level: +4 dBu, nominal
• Type: electronically balanced
• Impedance: 24 k ohms, nominal

Infrared Receiver Input:

• Type: intended for use with industry-standard receiver module; data rate 650 baud

Remote Control Inputs

• 4
• Type: +5 Vdc logic, activates on closure to system common
• Functions: mute, dim, talkback, input select

Downmix

• Functions: 5.1 to stereo, stereo to mono (mono-to-left-and-right, mono-to-center)
• 5.1 to Stereo: LS @ ・ dB summed with L; RS @ ・ dB summed with R, C @ ・ dB summed with L and R; LS, RS, and LFE monitor outputs mute
eStereo to Mono (Mono-to-Left-and-Right): L summed with R to L and R or L summed with R to C; attenuation independently configurable; C, LS, RS, and LFE monitor outputs mute
• Stereo to Mono (Mono-to-Center): L summed with R to C; attenuation independently configurable; L, R, LS, RS, and LFE monitor outputs mute

Stereo to Mono (Mono-to-Center) Bandpass Filter

• Response: ・ dB @ 100 Hz and 5 kHz, nominal, 12 dB/octave
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Connectors

• Audio: 4, 25-pin D-subminiature female
• Talent Amplifier Output: 3-pin male XLR-type
• To/From Model 75: 9-pin D-subminiature female
• Remote Control Inputs: 9-pin D-subminiature female
• Infrared Receiver Input: 3.5 mm 3-conductor jack
• AC Mains: 3-blade, IEC 320 C14-compatible (mates with IEC 320 C13)

AC Mains Requirement

• 100, 120, or 220/240 V, ±10%, factory configured, 50/60 Hz, 26 watts maximum

Dimensions (Overall)

• 19.0 inches wide (48.3 cm)
• 1.72 inches high (4.4 cm)
• 9.58 inches deep (24.3 cm)

Mounting

• one space (1U) in a standard 19-inch rack
• Weight: 9.5 pounds (4.3 kg)

Model 75 Control Console

• Application: supports Model 74 Central Controller

Power

• provided by Model 74 Central Controller

Output Data

• generates MIDI system-exclusive messages

Connector

• 9-pin D-subminiature female

Dimensions (Overall)

• 7.2 inches wide (18.3 cm)
• 2.2 inches high (5.6 cm)
• 5.4 inches deep (13.7 cm)

Weight

• 1.8 pounds (0.82 kg)

Model 35 Talent Amplifier

• Power Requirements: +20-32 Vdc (modulated with left channel audio), provided by Model 74

Power Present LED

• red, indicates presence of operating power

Connectors

• Input (from Model 74): 3-pin XLR-type, female
• Loop Thru: 3-pin XLR-type, male, connected in parallel with input connector
• Headphone Outputs: 2, ・-inch, 3-conductor (stereo) phone jacks
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Headphone Output

• 1, feeds two headphone jacks
• Load: intended for connection to one or two pairs of headphones with total impedance of 75 ohms or greater
• Output Level: user adjustable
• Maximum Output Voltage: 16 Vpp into 150 ohms @ 1% THD+Noise, 400 Hz
• Distortion (THD+N): 0.03%
• Frequency Response: 20 Hz-20 kHz ±0.5 dB

Dimensions (Overall)

• 4.2 inches wide (10.7 cm)
• 2.0 inches high (5.1 cm)
• 5.3 inches deep (13.5 cm)

Mounting

• desktop; microphone stand mounting adapter included

Weight

• 0.8 pounds (0.4 kg)