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UniT ools
®
UniTools
are phantom-powered in-line
microphone accessories that can be used
to combine a channel or add a switch.
Compact, economical and easy to use, they
provide outstanding, reliable performance.
Available in two function-specific models,
UniTools are intended primarily for use
with UniPoint
®
and similar condenser
microphones. Both have professional XLR-
type input/output connectors, and require
balanced cables and 24-48V DC phantom
power for operation. ("In" and "Out"
markings refer to the mic audio .) Both units
permit phantom voltage to pass on to the
microphone. Featuring rugged steel
housings, UniTools can be installed
anywhere in-line, either at the mixer input
or near the mic.
®
AT8681 UniMix
AT8684 UniMute
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
Form No. 0315-7055- 03 ©2002 Audio-Technica U.S., Inc. Printed in U.S.A.
®
AT8681 UniMix
AT8684 UniMute
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.
®
Mic Attenuator with User-definable Switch Function
AT8684 SPECIFICATIONS
INPUT IMPEDANCE
OUTPUT IMPEDANCE
MAXIMUM INPUT LEVEL
MUTING ATTENUATION
Description: The AT8684 is a versatile attenuator
which permits easy in-line switch installation and
flexible application. Type of external single-pole
switch the user supplies determines muting function;
closed contact causes muting. Use for on/off, push-
to-talk, push-to-mute, etc. (Additional, isolated poles
on the switch may be used to control logic-level DC
circuits.)
Audio-Technica microphones and accessories purchased in the U.S.A. are warranted for one year from date of purchase by
Audio-Technica U.S., Inc. (A.T.U.S.) to be free of defects in materials and workmanship. In event of such defect, product will
be repaired promptly without charge or, at our option, replaced with a new product of equal or superior value if delivered to
A.T.U.S. or an Authorized Service Center, prepaid, together with the sales slip or other proof of purchase date. Prior
approval from A.T.U.S. is required for return. This warranty excludes defects due to normal wear, abuse, shipping dam-
age, or failure to use product in accordance with instructions. This warranty is void in the event of unauthorized repair or
modification.
For return approval and shipping information, contact the Service Department, Audio -Technica U.S., Inc.,
1221 Commerce Drive, Stow, Ohio 44224.
Except to the extent precluded by applicable state law, A.T.U.S. will have no liability for any consequential, incidental,
or special damages; any warranty of merchantability or fitness for particular purpose expires when this warranty
expires.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
Outside the U.S.A., please contact your local dealer for warranty details.
®
®
†
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
both models.
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.
5,300 ohms
500 ohms
+17 dBV (1% T.H.D. at 1 kHz)
57 dB at 1 kHz
Operation: To connect the UniMute, 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.
The UniMute may be installed anywhere in-line.
Once mounted, connect an external single-pole
switch to the push terminals marked "Switch" and
check for proper operation.
One-Year Limited Warranty
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