Shure BETA 98AMP manual Load Impedance, Power Requirements, Specifications, Accessories and Parts

Load Impedance

Maximum SPL capability, output clipping level, and dynamic range vary with the input load impedance of the preamplifier to which you connect the microphone. Shure recom- mends a minimum input load impedance of 1000 Ω. Most modern microphone preampli- fiers meet this requirement. Higher impedance results in better performance 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.

SPECIFICATIONS

Cartridge Type	Electret Condenser
Polar Pattern	Cardioid
Frequency Response	20 to 20,000 Hz
Output Impedance	150 Ω
Sensitivity	–50.5 dBV/Pa[1] (2.5 mV)
open circuit voltage, @ 1 kHz, typical
Maximum SPL	2500 Ω load:	157.5 dB SPL
1 kHz at 1% THD[2]	1000 Ω load:	153.0 dB SPL
Signal-to-Noise Ratio[3]	63 dB
Dynamic Range	2500 Ω load:	126.5 dB
@ 1 kHz	1000 Ω load:	122.0 dB
Clipping Level	2500 Ω load:	12.5 dBV
@ 1 kHz, 1% THD	1000 Ω load:	7.5 dBV
Self Noise	31.0 dB SPL-A
equivalent SPL, A-weighted, typical
Common Mode Rejection	≥60 dB
10 to 100,000 kHz
Polarity	Positive pressure on diaphragm produces positive
	voltage on pin 2 with respect to pin 3
Power Requirements	11–52 V DC[4] phantom power (IEC-61938), 5.5 mA
Net Weight	130 g (4.6 oz.)

[1]1 Pa=94 dB SPL

[2]THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL

[3]S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted

[4]All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.

Accessories and Parts

Furnished Accessories

Universal Microphone Mount	A75M
A75M Small Mic Clip	A75-57F
Zippered Carrying Bag	95A2314
Snap-fit Windscreen	95A2064

Optional Accessories

Snap-Fit Windscreen (4 per package)	RK183WS
Metal Locking Windscreen	A412MWS
Mic Clip	A57F
7.6 m (25 ft.) Cable	C25E
A75M Large Mic Clip	A75-25D
A75M Universal Microphone Adapter	A75-UMA
Shock Stopper™ Isolation Mount	A53M

Replacement Parts

Cardioid Cartridge RPM98A/C

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.

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