SHURE BETA 91
Manual de Usuario

Polar Pattern Half-cardioid (cardioid in hemisphere above mounting surface), uniform with frequency, symmetrical around axis.

Case Matte-black , painted, die-cast, zinc-alloy case with matte-black steel grille. Dimensions 95 mm x 129 mm x 19 mm (3.75 in. x 5.08 in. x 0.75 in.) Net Weight 382 grams (13.5 oz) less cable Certification

Eligible to bear CE Marking. Conforms to European EMC Directive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments.

125 Hz 250 Hz 500, 1000 Hz

2500, 5000 Hz 6300, 10000 Hz 15000 Hz

FURNISHED ACCESSORIES

TYPICAL POLAR PATTERNS FIGURE 2 Output Level (at 1,000 Hz) Open Circuit Voltage: �59 dBV/Pa* (1.1 mV) typical
*1 Pa = 94 dB SPL

Storage Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26B21 Preamplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RPM626 4.6 m (15 ft) heavy-duty cable, TA3F to TA4F connectors . . . . . . . . . . . . . . . . . . . . . . . C98D
REPLACEMENT PARTS

Maximum SPL

Preamplifier Output Clipping Level

(20 Hz to 20 kHz, less than 1% THD) 2.5 kW load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 dB 1 kW load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 dB (20 Hz to 20 kHz, less than 1% THD*) 2.5 kW load . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 dBV (2.0 V) 1 kW load . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 dBV (1.26 V) (20 Hz to 20 kHz, less than 1% THD, 2.5 k� load)

Cardioid cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . RPM108 P.C. Board Assembly W/Plug and Housing . . . . . . RPM622
SERVICE STATEMENT

Dynamic Range

For additional service or parts information, please contact Shure�s Service Department at 1�800�516�2525. Outside the United States, please contact your authorized Shure Service Center.

125 dB (max SPL minus A-weighted noise) Output Noise 35 dB SPL (typical), A-weighted Signal-to-Noise Ratio 59 dB re 94 dB SPL Output Impedance 150 W (actual) Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 Power Phantom Power: 48 Vdc ±4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and 3. Electromagnetic Hum Pickup �7.5 dB equivalent SPL in 1 mOe field (60 Hz) Cable 4.6 m (15 ft) heavy-duty, two-conductor shielded, TA4F to TA3F connectors
*THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL.

2