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Key Features:
• Nonreflecting Black (RE90B) or Low-Gloss
White (RE90BW)
• Ultra-Low Profile
• Half-Cardioid Polar Response Promotes
Excellent Gain-Before-Feedback
• Full, Non-Slip Shock Pad Electrically and
Mechanically Isolates Case from Mounting
Surface
• Internally Equalized for Natural Response
on Large Surfaces
• Tamper-Resistant Terminal Block
Connections for Fixed or Temporary
Applications
General Description:
The Electro-Voice® RE90B and RE90BW are part of the Architectural
Microphone Series. The RE90B is a full-range condenser microphone
designed to be used for surface mounted applications such as
distance learning centers, video conferencing systems,
teleconferencing systems, and sound reinforcements. The polar
pattern of the RE90B is half-cardioid (half-space cardioid) to promote
good gain-before-feedback and suppress ambient noise. All
boundary type microphones operated on a flat surface are subject
to an increase in sensitivity of the microphone with increasing
frequency; this is called the baffle effect. To counteract this effect,
the RE90B has been designed with internal equalization to give the
RE90B a flat sensitivity response. The RE90B is designed to be
powered by an external 9-52 V dc phantom power supply (DIN 45
596). The RE90B microphone is encased in a heavy-duty zinc die
cast body protected by a strong, perforated steel screen. The
body of the microphone is designed to provide two distinctive
functions. First, the case is electronically isolated from the surface
that it is placed on by virtue of the rubber friction pad and the
internal fiber washers when permanently mounted. Second, the
microphone’s miniature cable can be routed directly from the rear
of the microphone, or the cable may be directed from the bottom of
the microphone though the table top without exposing the
microphone cable. The microphone cable is connected to the
microphone by a pilfer-resistant internal terminal block. For permanent
installation, a drilling template is provided. The RE90B’s body is
designed as a low-profile housing. Both microphones are shock
mounted through a combination of a heavy diecast case, a rubber
nonslip bottom pad, and internal padding of the microphone and
printed circuit board. This combination of isolation minimizes the
mechanical coupling of surface vibrations to the microphone. For
the RE90B, a 3.0-m (10 ft.) black miniature shielded two-conductor
cable is provided with a male XLR-type connector. The RE90BW is
provided with a 3.0-m (10 ft.) white miniature shielded two-
conductor cable with a male XLR-type connector.
Technical Specifications:
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RE90B/BW
Full-Range Condenser
Desk-Mount Microphone
with XLR Connector