Audio Technica UniMix AT8681 Product Information

UniT ools
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UniTools are phantom-powered in-line
microphone accessories that can be used to
combine a channel, gate an input, roll off the
response, add a switch, notch out a frequency
or pad down a signal. Compact, economical
and easy to use, they provide outstanding,
reliable performance that would otherwise
require a fully-equipped accessory rack.
Available in six function-specific models,
UniTools are intended primarily for use with
UniPoint ® and similar condenser micro-
phones. All have professional XLR-type
input/output connectors, and require
balanced cables and 24-48V DC phantom
power for operation. ("In" and "Out" mark-
ings refer to the mic audio .) All units permit
phantom voltage to pass on to the micro-
phone. Featuring rugged steel housings,
UniTools can be installed anywhere in-line,
either at the mixer input or near the mic.
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AT8681 UniMix
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AT8682 UniGate
AT8683 UniSteep
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AT8681 UniMix
AT8682 UniGate
AT8683 UniSteep
PHANTOM-POWERED IN-LINE
MICROPHONE ACCESSORIES
GENERAL SPECIFICATIONS
INPUT/OUTPUT CONNECTORS
PHANTOM POWER
FREQUENCY RESPONSE
GAIN
NOISE (A-WEIGHTED)
WEIGHT
DIMENSIONS
2-to-1 Mic Combiner with Balance Control
AT8681 SPECIFICATIONS
INPUT IMPEDANCE
OUTPUT IMPEDANCE
MAXIMUM INPUT LEVEL
MAXIMUM ATTENUATION
Description: The AT8681 combines the output from
two microphones into one channel. The balance
control attenuates each microphone by 6 dB (typical)
at midpoint.
Voice-operated Switch with Adjustable Threshold
AT8682 SPECIFICATIONS
INPUT IMPEDANCE
OUTPUT IMPEDANCE
MAXIMUM INPUT LEVEL
FREQUENCY RESPONSE
GATE ATTENUATION
MINIMUM THRESHOLD
Description: The AT8682 automatically attenuates a
channel by 10 dB (typical) when microphone is not in
use. LED indicates when gate is open.
Operation: To connect the UniGate, plug the micro-
phone cable into the XLRF-type input connector
(marked "In"). Then run a cable from the unit's
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80 Hz Mic Hi-pass Filter
AT8683 SPECIFICATIONS
INPUT IMPEDANCE
OUTPUT IMPEDANCE
MAXIMUM INPUT LEVEL
FREQUENCY RESPONSE
CORNER FREQUENCY
LOW-FREQUENCY ROLL-OFF
Description: The AT8683 provides a steep low-
frequency attenuation to improve the quality of
sound pickup under difficult conditions without
affecting voice quality. Useful for minimizing back-
ground ambience, air conditioning rumble, mechani-
cal noise and other undesired low-frequency sounds.
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AT8684 UniMute
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AT8685 UniTrap
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AT8686 UniLim
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XLRF/XLRM-type
24-48V DC, 2-4 mA typical
20-20,000 Hz
Unity (0 dB), +0/–1.5 dB
–115 dBV typical
8.8 oz (250 grams) typical
5.12" (130.0 mm) W x 2.36" (60.0 mm) D
x 1.73" (44.0 mm) H typical
† Measured at 48V phantom power, 150 ohms input load
and 100,000 ohms output load. Specifications apply to
all models except as noted below.
10,000 ohms
250 ohms
+15 dBV (1% T.H.D. at 1 kHz)
33 dB at 1 kHz
Operation: To connect the UniMix, plug two micro-
phones into the XLRF-type input connectors (marked
"In"). Then run a cable from the unit's XLRM-type
output connector (marked "Out") to the mixer input.
Adjust the Balance control until the output of the
UniMix is equal for both microphones.
2,500 ohms
460 ohms
+6 dBV (1% T.H.D. at 1 kHz)
25-20,000 Hz
10 dB typical
–85 dBV
XLRM-type output connector (marked "Out") to the
mixer input.
The Threshold control sets the reference level that
must be exceeded for a microphone to be consid-
ered "in use." Adjust to keep background noise level
from triggering the microphone.
2,100 ohms
150 ohms
+3 dBV (1% T.H.D. at 1 kHz)
80-20,000 Hz
80 Hz
18 dB/octave
Operation: To connect the UniSteep, plug the micro-
phone cable into the XLRF-type input connector
(marked "In"). Then run a cable from the unit's
XLRM-type output connector (marked "Out") to the
mixer input.
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