Shure 181 manual Load Impedance, Power Requirements, Accessories and Parts, Certification

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.

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.

Accessories and Parts

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
Shock Stopper™ Isolation Mount	A53M
7.6 m (25 ft.) Cable	C25E

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: EMEAsupport@shure.de

Note: Information in this guide is subject to change without notice. For the additional information about this product, please visit www.shure.com.

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

20,32 mm

(0.80 in.)

124,46 mm

(4.90 in.)

34,54 mm

(1.36 in.)

4