Studio Technologies 74 - Manual (Page 43)

Issue 2, January 2006 Model 74/75 User Guide
Page 44 Studio Technologies, Inc.
for Surround
Specifi cations
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: –12 dBV to +6 dBu, adjustable
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 Amplifi er Output:
Compatibility: provides power and audio signals
for up to four Model 35 Talent Amplifi ers
Type: DC power with two channels of unbalanced
audio
Connections: common on pin 1, DC (+27 volts
nominal, 200 milliamperes maximum) modulated
with channel 1 audio (–10 dBu nominal) on pin 2,
and channel 2 audio (–10 dBu nominal) on pin 3
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 volts DC 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 @ –3 dB summed with L; RS @
–3 dB summed with R, C @ –6 dB summed with
L and R; LS, RS, and LFE monitor outputs mute
Stereo to Mono (Mono-to-Left-and-Right): L
summed with R to L and R or L summed with R to
C; attenuation independently confi gurable; C, LS,
RS, and LFE monitor outputs mute
Stereo to Mono (Mono-to-Center): L summed
with R to C; attenuation independently confi gu-
rable; L, R, LS, RS, and LFE monitor outputs mute
Stereo to Mono (Mono-to-Center) Bandpass
Filter:
Response: –3 dB @ 100 Hz and 5 kHz, nominal,
12 dB/octave
Connectors:
Audio: 4, 25-pin D-subminiature female
Talent Amplifi er 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 confi gured,
50/60 Hz, 26 watts maximum