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Highlights
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Stereo input with transformerless laser-trimmed circuitry
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ExactCal section allows precise input-level calibration
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15-turn input trim potentiometers
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3-pin Neutrik XLR-type input connectors
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Eight independent stereo outputs
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Configurable –10 dBV or +4 dBu nominal output levels
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25-pin D-subminiature output connectors
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Inputs and outputs support balanced or unbalanced operation
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Internal ±17 V power supply with toroidal mains transformer
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Single rack-space mounting
One
Stereo Input
The
differential input circuitry is compatible with balanced or unbalanced
signals having a nominal level range of –12 dBV to +10 dBu. Laser trimmed,
the inputs offer superior common-mode signal rejection. To achieve optimal
audio performance the ExactCal calibration section matches the specific
input levels with the Model 81’s internal gain structure. Two 15-turn
trim potentiometers and four LEDs allow fast, precise calibration.
With
ExactCal, excellent audio performance can be achieved with little or no
hassle. During normal operation, the ExactCal LEDs also serve as
convenient signal-present indicators. Standard 3-pin XLR-type connectors
are used to interface the input sources with the input circuitry.
Manufactured by Neutrik, the connectors feature metal housings for
reliable operation.
Eight
Stereo Outputs
The
Model 81 contains eight independent stereo output sections. For
compatibility with a wide range of facilities, each output section can be
independently configured for a –10 dBV or +4 dBu nominal output level.
Each output features an electronically balanced circuit capable of driving
balanced or unbalanced loads. Short circuit resistant, the rugged output
circuits can drive full signal levels into 600 ohm or greater loads.
The
Model 81’s architecture precludes the need for individual output-level
trim potentiometers. With the input signal calibrated using the ExactCal
section, the eight outputs use 1%-tolerance components to provide precise
–10 dBV or +4 dBu outputs. Two 25-pin D-subminiature connectors are used
to interface the eight stereo outputs. Following the industry-standard
connection scheme, the D-sub connectors allow fast, reliable, low-cost
interconnection.
Audio
Performance
The
Model 81 is the result of exacting circuit design combined with the latest
state-of-the-art components. Like all Studio Technologies products, the
Model 81 has survived tough listening evaluations by industry
professionals. These veterans have the "ears" to guide us in
achieving the right performance. The outcome is a product that achieves
sonic excellence.
Model
81 Specifications
Audio
Input: 1, stereo
Type: electronically balanced, compatible
with balanced or unbalanced signals
Impedance: 24 k ohms
Nominal Input Level: –12 dBV to +10 dBu
Input Level Controls: 2, 15-turn trim
potentiometers
Audio
Outputs: 8, stereo
Type: electronically balanced, direct coupled
Compatibility: intended to drive balanced or
unbalanced loads of 600 ohms or greater
Output Impedance: 50 ohms
Nominal Output Level: –10 dBV or +4 dBu, each
output individually configurable
Maximum Output Level: +27 dBu into 10k ohms,
+26 dBu into 600 ohms
Frequency Response: 10 Hz-70 kHz +0/–0.5 dB
(down 1 dB @ 110 kHz)
Distortion (THD+N): 0.004%
S/N Ratio: 91 dB (20 Hz-20 kHz, ref. +4 dBu)
Crosstalk: 75 dB (1 kHz, ref. +4 dBu)
Connectors:
Audio Inputs: 2, 3-pin XLR-type, manufactured
by Neutrik
Audio Outputs: 2, 25-pin D-subminiature
AC Mains: standard 3-blade IEC-type
AC
Mains Requirement: 100, 120, or 220/240 V, ±10%, factory
configured, 50/60 Hz
Dimensions
(Overall):
19.00 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
6.65 inches deep (16.9 cm)
Mounting: one space in a standard 19-inch rack
Weight:
7.0 pounds (3.2 kg)
Specifications
subject to change without notice.
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