The Model 50 Central Controller and the Model 51 Control Console are
part of the StudioComm family of products. StudioComm equipment is used
in audio production facilities that lack flexible monitoring and
communications. Model 50 and Model 51 features include control room and
studio monitoring, meter output, integrated headphone (cue) system, and
dub (copy) output. Communications functions include talk to studio,
talk to headphones, and slate. StudioComm products perform to a level
rivaling most large consoles, while actually surpassing them in terms
of flexibility. With these features, StudioComm products can
dramatically increase production efficiency.
Model 50 Central Controller
The Model 50 is the connection point for all audio inputs and outputs,
and provides power for the Model 51 and the talent amplifiers. Front
panel LEDs indicate the functional status of the Model 51 and the
talent amplifiers, and data flow from the Model 51.
Seven Stereo Line Inputs
The analog outputs of workstations, DAT recorders, optical CD
recorders, CD players, cassette decks, or virtually any analog source
can be connected to the Model 50's line inputs. The inputs accept
balanced or unbalanced signals, and can be individually configured for
either –10 dBV or +4 dBu operating levels. Each input can also be
configured to accept a stereo or mono signal. Inputs 1 through 6 are on
the back panel. For temporary patch convenience, input 7 is on the
front panel.
Monitor Outputs
The Model 50 contains two sets of balanced stereo line level outputs
for control room monitors and one set for studio monitors.
Dub Output
A balanced stereo line output is provided for dub (copy) use. The dub
output is available from either the back or the front panel of the
Model 50, and can be switched between –10 dBV and +4 dBu operating
levels.
Meter Output The meter output provides a stereo
line-level signal that "follows" the source selected for the control
room. The signal is not affected by the control room level circuitry,
but does reflect the monaural function. The meter output is intended to
be connected to VU- or PPM-type meter panels that contain series
current-limiting resistors or input buffer amplifiers.
Headphone Output
The headphone (cue) output is designed to feed up to four StudioComm
talent amplifier modules. The output is a 3-conductor XLR-type
connector that provides power and left and right audio to the talent
amplifiers. The Model 70 Interface is available to convert the talent
amplifier output to separate left and right balanced line outputs.
Model 51 Control Console
The Model 51 provides a small but comfortable command center. All
routing, switching, and level adjustment functions are located on the
control console. Numerous LEDs provide complete status information. The
Model 51's unique configure mode provides extensive flexibility.
The Model 51 contains an electret condenser microphone located near the
top of the console for convenient wide-range voice pickup. Inputs for
remote talk to studio and talk to headphones switches are provided on
the back panel.
Routing and Switching
Any of the seven line inputs can be sent to the control room monitors,
studio monitors, headphones, or dub. The studio monitor can be set to
follow either the control room or the headphone source. Level
adjustment, mono, output select switching, and configurable dim are
provided for the control room monitors. The studio monitors have a
level adjustment and on/off controls.
Communications
Three separate communications functions, each with independent level
control, are provided: talk to studio, talk to headphones, and slate.
Talk to studio interrupts the studio source and sends voice audio. Talk
to headphones either interrupts the headphone source, or blends voice
audio with the headphone source. Slate has two operating modes: sending
voice to the dub output, or sending voice to the dub output and the
headphone output. If configured, slate can send a 50 Hz tone along with
voice audio.
Specifications

Model 50 Central Controller

Audio Inputs: 7, stereo
Connectors: ¼-inch, 3-conductor phone jacks
Type: electronically balanced, compatible with balanced or unbalanced signals
Impedance: 24 k ohms
Nominal Input Level: –10 dBV or +4 dBu

Outputs: 2, control room; 1, studio
Type: electronically balanced, stereo
Maximum Output Level: +27 dBu into 10 k ohms, +26 dBu into 600 ohms
Frequency Response: 10 Hz-40 kHz +0/–0.5 dB (down 1 dB @ 80 kHz)
Distortion (THD+N): 0.03%
S/N Ratio: 87 dB (20 Hz-2 0 kHz)

Dub Output: 1, stereo
Type: electronically balanced
Nominal Output Level: –10 dBV or +4 dBu
Maximum Output Level: +27 dBu into 10 k ohms, +26 dBu into 600 ohms
Frequency Response: 10Hz-40 kHz +0/–0.5 dB (down 1 dB @ 80 kHz)
Distortion (THD+N): 0.004%
S/N Ratio: 92 dB (20 Hz-20 kHz)
Slate Tone: 50 H z sine wave

Meter Output: 1, stereo
Type: unbalanced
Nominal Output Level: +4 dBu
Maximum Output Level: +21 dBu into 10 k ohms
Frequency Response: 10 Hz-40 kHz +0/–0.5 dB (down 1 dB @ 70 kHz)
Distortion (THD+N): 0.004%
S/N Ratio: 92 dB (20 Hz-20 kHz)

Talent Amplifier Output: provides power and audio signals for up to four Model 35 Talent Amplifiers

AC Mains Requirement: 100, 120, or 220/240 V, ±10%, factory configured, 50/60 Hz

Dimensions (Overall):
19.0 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
8.75 inches deep (22.2 cm)

Mounting: one space in a standard 19-inch rack

Weight: 8.9 pounds (4.1 kg)

Model 51 Control Console
Output Data: generates MIDI system-exclusive messages

Internal Microphone: electret condenser

External Communications Contacts: normally open for talk to studio and talk to headphones

Dimensions (Overall):
7.4 inches wide (18.8 cm)
2.6 inches high (6.6 cm)
7.3 inches deep (18.5 cm)

Weight: 2.5 pounds (1.1 kg)

Model 70 Interface

Connectors: 3-pin XLR-type, 1 female, 3 male
Line Output: 1, stereo
Type: electronically balanced
Nominal Output Level: +4 dBu
Maximum Output Level: +20 dBu into 10 k ohms, +19 dBu into 600
Distortion (THD+N): 0.02%

Dimensions (Overall):
4.2 inches wide (10.7 cm)
2.0 inches high (5.1 cm)
4.7 inches deep (11.9 cm)

Weight: 0.8 pounds (0.4 kg)