Electro-Voice RE90H User Manual

Key Features:

• RF Shield provides superior RFI/GSM shielding

• Cardioid polar pattern

• Non-reflecting black (RE90H) or low-gloss white

(RE90HW) 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)

• Three-pin male XLR-type output connector fits with
female bulkhead XLR-type connector

General Description:

The Electro-Voice RE90H and RE90HW are part of the
RE Series Architectural Microphone Group, and are
highly-shielded from RFI/GSM thanks to EV’s exclusive
RF Shield technology. The RE90H and RE90HW 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. RE90H’s low self-noise and
high-output signal level combine to produce low-noise,
sound-reinforcement and recording. Exceptionally high
sensitivity, a uniform cardioid 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 supplying 9 to 52 volts. The RE90H
is furnished with 25 feet of black (RE90H) or white (RE90HW)
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 performance 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 the back
of the microphone and slightly twist the microphone on the
wire holder (clockwise rotation rotates the RE90H to the left;
counterclockwise rotation rotates the RE90H to the right).
Secure this position by tightening the holding nut.

Note: For fixed installations, allow the microphone cable
to hang for at least 24 hours so the cable can completely
relax and establish a set. This allows the microphone to be
accurately positioned over a choir, stage, or orchestra.

RE90H/RE90HW

Condenser Cardioid

Hanging Microphone

Technical Specifications:

Generating Element: Condenser, back electret

Frequency Response: 75Hz to 15,000Hz (see chart)

Polar Patterns: (see chart) Cardioid

Sensitivity: Open Circuit Voltage, 1kHz:

20mV/Pascal

Clipping Level (1% THD): 120dB SPL

Equivalent Noise: 25dB SPL “A” weighted

(0 dB=20 micropascals)

Dynamic Range: 95dB

Output Impedance, 1 kHz: 200 Ohms

Power Requirements: Phantom, 9–52VDC

Current Consumption: <5 mA with P48 supply

Polarity: Pin 2 positive, referenced to pin

3, with positive pressure on the
diaphragm

Dimensions, Transducer: Diameter = 12.7mm (0.4”)

Length = 36.8mm (1.45”)

Dimensions, Electronics Module: Diameter = 19mm (0.75”)

Length = 94mm (3.7”)

Color (finish): RE90H = Low-Gloss Black

RE90HW = Low-Gloss White

Environmental Conditions: Relative Humidity 0 to 50%

-29°C to 74°C (-20°F to 165°F)
Relative Humidity 0 to 95%

-29°C to 57°C (-20°F to 135°F)

Cable: Length = 7.6m (25ft)

Net Weight: 157g (5.5oz)

Shipping Weight 324g (11.4oz)

Applications:

When hanging one or more microphones to provide
coverage for a choir, instrumental or theater group, the
best microphone position for optimum sound quality and
feedback control depends on many factors—sound system
characteristics, construction of the auditorium 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 1). 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
microphones “see” the same signal from slightly different
distances. The 3-to-1 rule is as follows: when multiple
microphones are used, place them at least three times as far
apart as any one of them is from the nearest sound source.
Figure 2 shows a proper application of the 3-to-1 rule. The
RE90H/HW may also be used to provide coverage for live
theater applications (Figure 3). Most of the action occurs at
center stage, so the microphone should be positioned above
and pointed to the center of the stage.

Architects’ and Engineers’ Specifications:

RE90H and R E90HW

The microphone shall be a back-electret condenser type with
a frequency response of 75Hz to 15kHz. The microphone
shall produce a high degree of output signal quality despite
the possible near-field presence of RF (Radio Frequency)
devices such as cell phones. The microphone shall have a
cardioid polar pattern with a rear response which is typically
15dB below the front response at 1.0kHz. The microphone
shall have an output level of 20mV/Pascal, and output shall
not be appreciably affected by the following temperature and
humidity extremes: 29°C to 74°C (-20°F to 165°F) when the
relative humidity is 0–50%; -29°C to 57°C (-20°F to 135°F)
when relative humidity is 0–95%. The microphone shall
have a nominal, balanced output impedance of 200 Ohms
when connected to its electronics module. The microphone
shall have a low-gloss black finish (RE90H) or a low-gloss
white finish (RE90HW). The cable color shall match the
transducer. The transducer shall have a wire hanger for
directing the microphone. Dimensions: the transducer shall
be 12.7mm (0.4in.) wide and 36.8mm (1.4in.) long; the cable
shall be 7.6m (25ft) long and 2.6mm (0.1in.) in diameter. The
electronics module shall be a metal cylinder 94mm (3.7in.)
long and 19mm (0.75in.) in diameter. Termination to the
electronics module shall be a 3-pin male XLR type connector.
The Electro-Voice RE90H and RE90HW are specified.

Frequency Response:

Figure 1: Hanging Mic Placement

Figure 2: 3-to-1 Rule

Figure 3: Live Theater Placement

Electro-Voice

12000 Portland Avenue South, Burnsville, MN 55337
Phone: [phone], Fax: [phone]

www.electrovoice.com

© Bosch Communications Systems 10/2011

Part Number F.01U.179.711 Rev 06

Polar Response:

Warranty:

Please refer to the Limited Warranty information found at:
www.electrovoice.com

U.S.A. and Canada only. For customer orders, contact Customer Service at:

800/392-3497 Fax: [phone]

Europe, Africa, and Middle East only. For customer orders, contact Customer Service at:

+ 49 9421-706 0 Fax: + 49 9421-706 265

Other Internatonal locations. For customer orders, Contact Customer Service at:

+ 1 952 884-4051 Fax: + 1 952 887-9212

For warranty repair or service information, contact the Service Repair department at:

800/685-2606

For technical assistance, contact Technical Support at: 866/78AUDI O

Specifications subject to change without notice.