Studio Technologies 55 1996 - Manual (Page 14)

Issue 3, December 1996 Model 55/56 User Guide
Page 14 Studio Technologies, Inc.
high (+ or hot), and both the ring and
sleeve to shield. If connecting to an
unbalanced source in this manner results
in hum or noise, connect tip to high (+ or
hot) and ring to shield; leave the sleeve
unterminated.
Control Room Output
The Model 55 contains a stereo line-level
output for connection to an audio power
amplifier. This audio amplifier serves a
pair of loudspeakers that are located in the
control room. (Of course the control room
output can be connected to loudspeakers
that contain integral power amplifiers, such
as the products from Genelec.)
The output is electronically balanced and
capable of driving loads of 600 ohms
or greater. In most situations best perfor-
mance will be obtained if the audio amp-
lifier’s input sensitivity is set to near
maximum. Refer to the Technical Notes
section for details on setting amplifier
sensitivity.
The control room output utilizes two
¼-inch 3-conductor phone jacks for inter-
connection. Prepare the mating connec-
tors (plugs) so that tip is signal high (+ or
hot), ring is low (– or cold), and sleeve is
shield. To connect to an unbalanced load
connect the tip to high (+ or hot), and both
the ring and sleeve to shield.
Meter Output
The meter output is intended to be con-
nected to a VU- or PPM-type meter panel
that contains input buffer circuitry or series
current-limiting resistors. Each output is
unbalanced, has a nominal level of +4dBu,
and is capable of driving loads of 2k ohms
and greater.
The meter output utilizes two ¼-inch
3-conductor phone jacks for interconnec-
tion. Prepare the mating connectors
(plugs) so that tip is signal high (+ or hot),
sleeve is low (– or cold); ring is not con-
nected.
Dub Output
The Model 55 contains a stereo line-level
output which is intended for connection to
a variety of analog audio devices. The dub
output is electronically balanced and cap-
able of driving 600 ohm loads or greater.
With the input impedance of most audio
devices at 10k ohms or greater, the dub
output can easily drive 10 or more devices
simultaneously.
The dub output can be configured for a
nominal level of –10dBV or +4dBu, so you
can connect to all line-level inputs with no
hassle (refer to the Configuration section
under Dub Output Level).
The dub output utilizes two ¼-inch
3-conductor phone jacks for interconnec-
tion. Prepare the mating connectors
(plugs) so that tip is signal high (+ or hot),
ring is low (– or cold), and sleeve is shield.
To connect to an unbalanced load connect
the tip to high (+ or hot), and both the ring
and sleeve to shield.
Talent Amplifier Output
Up to four Model 35 or Model 38 Talent
Amplifiers can be connected in any combi-
nation to the Model 55’s talent amplifier
output. The output connector is a 3-pin
male XLR-type. For best performance,
use low-capacitance shielded microphone-
type cable to distribute the talent amplifier
signal. If you have a choice, select cables
with the heaviest wire gauge commonly
available. This will reduce voltage drop