Shure BETA 181 - Manual (Page 4)

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Accessories and Parts
Avoiding Pickup of Unwanted Sound Sources
Directional microphones are most sensitive to sounds arriving on axis and reject at angles depending upon the polar pattern. The following chart shows the rejection angles of each
microphone. In live performance or recording settings, align monitors, P.A. loudspeakers, and unwanted sound sources at these angles.
To minimize feedback and ensure optimum rejection of unwanted sound, always test microphone placement before a performance.
Cardioid Supercardioid Bidirectional
Off-axis null points at 180 degrees Off-axis null points at 120 degrees Off-axis null points at 90 degress
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC
Directive 2004/108/EC. Meets Harmonized Standards
EN55103-1:1996 and EN55103-2:1996, for residential
(E1) and light industrial (E2) environments.
The Declaration of Conformity can be obtained from:
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Wannenacker Str. 28
D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: [email protected]
Power Requirements
This microphone requires phantom power and performs
best with a 48 Vdc supply (IEC-61938). However, it will
operate with slightly decreased headroom and sensitivity
with supplies as low as 11 Vdc.
Most modern mixers provide phantom power. You must
use a balanced microphone cable: XLR-to-XLR or
XLR-to-TRS.
Load Impedance
Maximum SPL capability, output clipping level, and dy-
namic range vary with the input load impedance of the
preamplifier to which you connect the microphone. Shure
recommends a minimum input load impedance of 1000
Ω. Most modern microphone preamplifiers meet this
requirement. Higher impedance results in better perfor-
mance for these specifications.
124,46 mm
(4.90 in.)
20,32 mm
(0.80 in.)
34,54 mm
(1.36 in.)
Furnished Accessories
Mic Clip A57F
Zippered Carrying Case A181C
Windscreen A181WS
Optional Accessories
Cardioid Capsule RPM181/C
Supercardioid Capsule RPM181/S
Bidirectional Capsule RPM181/BI
Omnidirectional Capsule RPM181/O
Beta 181 Preamp RPM181/PRE
Universal Microphone Mount A75M
7.6 m (25 ft.) Cable C25E
Note:
Information in this guide is subject to change
without notice. For the additional information about this
product, please visit www.shure.com.