Electro-Voice RE90H User manual

RE90H
RE90WH
Condenser Cardioid
Hanging Microphone
• Non-reflecting black (RE90H) or
low-gloss white (RE90WH) with
matching cable.
• Shielded pre-amp is highly-resistant
to electrical noise and radio frequency
interference.
• 25-ft. braided, shielded cable maintains
microphone's position (not rotation)
• Cardioid polar pattern
• Three-pin male XLR-type output connec-
tor fits with female bulkhead XLR-type
connector
Description and Application
The RE90H and RE90WH of the Architec-
tural Microphone Series are back-electret
condenser hanging microphones providing
an extended, flat frequency response with a
controlled cardioid polar pattern for high-
quality sound reinforcement. The RE90H is
specifically designed for live pickup of
choirs, instrumental and vocal groups, and
theater. The size and color of the transducer
and cable allow the microphone to blend in
with its surroundings.
The RE90H’s low self-noise and high-out-
put signal level combine to produce low-
noise, sound-reinforcement and recording.
Exceptionallyhighsensitivity,auniformcar-
dioid polar response, and smooth frequency
response make the RE90H ideally suited for
distant sound pick-up. The cardioid polar
pattern is precisely controlled and is highly
effective in suppressing feedback without
coloration of sound. Power for the RE90H
is obtained from any phantom source sup-
plying 9 to 52 volts.
TheRE90Hisfurnishedwith25 feet of black
(RE90H) or white (RE90WH) miniature
braided shielded cable. The design of the
cable ensures the microphone’s horizontal
position will be held stable without the need
for fish-line tethering.
The RE90H is easily aimed at the perfor-
mance with the supplied steel wire hanger
and holding nut. The wire hanger attached
to the microphone element and cable can be
bent to aim the microphone in the vertical
plane. To position the microphone on the
horizontal plane, loosen the holding nut on
theback of the microphone and slightly twist
the microphone on the wire holder (clock-
wise rotation rotates the RE90H to the left;
counterclockwiserotationrotatestheRE90H
to the right). Secure this position by tight-
ening the holding nut.
Note: For fixed installations, allow the mi-
crophone cable to hang for at least 24 hours
so the cable can completely relax and estab-
lish a set. This allows the microphone to be
accurately positioned over a choir, stage or
orchestra.
Application Notes
When hanging one or more microphones to
provide coverage for a choir, instrumental
or theater group, the best microphone posi-
tionfor optimum sound quality and feedback
control depends on many factors–sound sys-
tem characteristics, construction of the au-
ditorium or theater, and the size and nature
of the performing group. Two general rules
to observe for the best sound coverage are
(1) microphone position and (2) the “3-to-1
rule.”
The first rule is to suspend the microphone
approximately two to three feet in front of
the first row of performers and two to three
feet higher than the heads of the last row of
performers. The microphones are usually
aimed to point at the last row of performers
(see Figure 3).
The second rule, the “3-to-1 rule,” should
be applied when more than one microphone
is required, and their outputs are combined
(as with a mixer). Following the 3-to-1 rule
avoids the deep voids and dips in frequency
response that occur when two or more mi-
crophones “see” the same signal from
slightly different distances. The 3-to-1 rule
isasfollows:whenmultiplemicrophonesare
used, place them at least three times as far
apart as any one of them is from the nearest
sound source. Figure 4 shows a proper ap-
plication of the 3-to-1 rule.
TheRE90Hmayalsobeusedtoprovidecov-
erage for live theater applications (Figure 5).
Most of the action occurs at center stage, so
the microphone should be positioned above

RE90H/RE90WH Condenser Cardioid Hanging Microphone
RE90H/RE90WH Condenser Cardioid Hanging Microphone
and pointed to the center of the stage.
Architectural & Engineering
Specifications
The microphone shall be a back-electret
condenser type with a frequency response
of 75 Hz to 15 kHz. The microphone shall
have a cardioid polar pattern with a rear re-
sponse which is typically 15 dB below the
front response at 1.0 kHz. The microphone
shall have an output power level of -30.4 dB,
where 0 dB = 1 milliwatt per pascal, and
output shall not be appreciably affected by
the following temperature and humidity ex-
tremes: -29° to 74°C (-20° to 165°F) when
the relative humidity is 0-50%; -29° to 57°C
(-20° to 135°F) when relative humidity is
0-95%. The microphone shall have a nomi-
nal, balanced output impedance of 200 ohms
when connected to its electronics module.
Themicrophoneshallhavealow-gloss black
finish (RE90H) or a low-gloss white finish
(RE90WH). The cable color shall match the
transducer. The transducer shall have a wire
hangerfordirectingthemicrophone. Dimen-
sions: the transducer shall be 12.7 mm
(0.4 in.) wide and 36.8 mm (1.4 in.) long;
the cable shall be 7.6 m (25 ft) long and
2.6 mm (0.1 in.) in diameter. The electron-
ics module shall be a metal cylinder 94 mm
(3.7 in.) long and 19 mm (0.75 in.) in diam-
eter. Termination to the electronics module
shall be a 3-pin male XLR type connector.
TheElectro-VoiceRE90H and RE90WH are
specified.
Warranty (Limited)
Electro-Voice products are guaranteed
against malfunction due to defects in mate-
rials or workmanship for a specified period,
as noted in the individual product-line
statement(s)below,orintheindividualprod-
uct data sheet or owner’s manual, beginning
with the date of original purchase. If such
malfunction occurs during the specified pe-
riod, the product will be repaired or replaced
(at our option) without charge. The product
will be returned to the customer prepaid.
Exclusions and Limitations: The Limited
Warranty does not apply to: (a) exterior fin-
ish or appearance; (b) certain specific items
described in the individual product-line
statement(s)below, or in theindividual prod-
uct data sheet or owner’s manual; (c) mal-
function resulting from use or operation of
the product other than as specified in the
product data sheet or owner’s manual; (d)
malfunction resulting from misuse or abuse
of the product; or (e) malfunction occurring
at any time after repairs have been made to
the product by anyone other than Electro-
Voice Service or any of its authorized ser-
vice representatives. Obtaining Warranty
Service: To obtain warranty service, a cus-
tomer must deliver the product, prepaid, to
Electro-Voice Service or any of its autho-
rized service representatives together with
proof of purchase of the product in the form
of a bill of sale or receipted invoice. A list of
authorized service representatives is avail-
able from Electro-Voice Service at 600 Cecil
Street, Buchanan, MI 49107 (800/234/6831
or FAX [phone]). Incidental and
Consequential Damages Excluded: Prod-
uct repair or replacement and return to the
customer are the only remedies provided to
the customer. Electro-Voice shall not be li-
ableforany incidental or consequential dam-
ages including, without limitation, injury to
persons or property or loss of use. Some
states do not allow the exclusion or limita-
tion of incidental or consequential damages
so the above limitation or exclusion may not
apply to you. Other Rights: This warranty
gives you specific legal rights, and you may
also have other rights which vary from state
to state.
Electro-Voice Wired Microphones are
guaranteed against malfunction from any
causefortwo (2) years from the date of origi-
nal purchase. In addition, the Limited War-
ranty for the acoustic system contained in
these microphones shall apply for the life of
the product, defined as a period of ten (10)
years from the date that the manufacture of
the specific microphone has been discontin-
ued. Any and all active electronics incorpo-
rated in these microphones are guaranteed
against malfunction due to defects in mate-
rials or workmanship for a period of three
(3) years from the date of original purchase.
The Limited Warranty does not extend to
cables, cable connectors, or switches. Addi-
tional details are included in the Uniform
Limited Warranty statement.
For warranty repair, service information, or
a listing of the repair facilities nearest you,
contactthe service repair department at: 616/
695-6831 or 800/685-2606.
Fortechnical assistance, contact Technical
Support at 800/234-6831 or 616/695-6831,
M-F, 8:00 a.m. to 5:00 p.m. eastern standard
time.
Specifications subject to change without no-
tice.

RE90H/RE90WH Condenser Cardioid Hanging Microphone
RE90H/RE90WH Condenser Cardioid Hanging Microphone
Figure 1—Frequency Response
Figure 2—Polar Response
Figure 3—Hanging Microphone
Placement
Scale: 5 dB per Division
80 Hz
20
5 dB
FREQUENCY IN HERTZ
RESPONSE IN dB
30 50 100 200 500 1000 5000
2000 10000 20000

RE90H/RE90WH Condenser Cardioid Hanging Microphone
RE90H/RE90WH Condenser Cardioid Hanging Microphone
MICROPHONES - Condensers Part Number 534912 – 9834
Figure 4—3-to-1 Rule
Figure 5—Live Theater Placement
Specifications
Generation Element:
Condenser, back electret
Frequency Response (see Figure 1):
75 Hz to 15,000 Hz
Polar Pattern:
Cardioid
Sensitivity,
Open Circuit Voltage, 1 kHz:
27 mV/pascal
Power Level, 1 kHz (0 dB =
1 mW/pascal):
-30.4 dB
Clipping Level (1% THD):
120 dB SPL
Equivalent Noise:
25 dB SPL A weighted
Dynamic Range:
95 dB
Output Impedance, 1 kHz:
200 ohms
Power Requirements:
9 to 52 V dc phantom supply
Current Consumption:
2.0 mA
Polarity:
Pin 2 positive, referenced to pin 3,
with positive pressure on the dia-
phragm
Color,
RE90H:
Low-gloss black
RE90WH:
Low-gloss white
Environmental Conditions,
Relative Humidity 0-50%:
-29° to 74°C (-20° to 165°F)
Relative Humidity 0 to 95%:
-29° to 57°C (-20° to 135°F)
Dimensions,
Transducer:
12.7 mm (0.4 in.) diameter
36.8 mm (1.45 in.) long
Microphone Cable:
7.6 m (25 ft) long
Electronics Module:
94 mm (3.7 in.) long
19 mm (0.75 in.) diameter
Net Weight:
157 grams (5.5 oz)
Shipping Weight:
324 grams (11.4 oz)
600 Cecil Street, Buchanan, MI 49107
800/234-6831, 616/695-6831, 616/695-1304 Fax
© Telex Communications, Inc., 1998 • Litho in U.S.A.