User manual SHURE BETA 181

[. . . ] Featuring interchangeable cardioid, supercardioid, omnidirectional and bidirectional capsules for superior versatility, the small diaphragm of the Beta 181 provides superior audio with consistent, "textbook" polar responses in a form factor small enough to get close to the source in the tightest conditions. · When using directional microphones, work closely to the microphone for extra bass response to take advantage of Proximity Effect. · Avoid excessive handling to minimize pickup of mechanical noise and vibration. [. . . ] · Do not cover any part of the microphone grille, as this will adversely affect microphone performance. · Add a windscreen when using the microphone outdoors. The following table lists the most common applications and placement techniques. Keep in mind that microphone technique is largely a matter of personal taste; there is no one "correct" microphone position. Cardioid · Drum overheads · Piano · Acoustic instruments Supercardioid · Close-miking in performance settings · Snare drum · Acoustic instruments Omnidirectional · Room and ambient pickup · Mono drum overhead Bidirectional* · Use a pair of Beta 181/BI for Blumlein stereo teqhnique · Place microphones as far as possible from reflective surfaces to reduce Comb Filtering. · Follow the 3 to 1 Rule by spacing each microphone by at least three times the distance to its source to reduce Phase Cancellation. · Use the fewest amount of microphones as practical to increase the Potential Acoustic Gain and prevent feedback. · Aim the microphone toward the desired sound source; angle unwanted sounds toward its null point. Variations Beta 181/C Cardioid Microphone Beta 181/O Omnidirectional Microphone Beta 181/BI Bidirectional Microphone Beta 181/S Supercardioid Microphone Features · Premier live performance microphone with Shure quality, ruggedness, and reliability · Compact preamp attaches to four interchangeable capsules · Pair with a Beta 181/ BI for M/S stereo technique · String ensembles · Mono drum overhead · Dual sound sources, such as between tom-toms or acoustic instruments · Wide dynamic range for use in high SPL environments · Side-address form allows for discreet positioning in tight performance and recording settings · Innnovative locking ring provides a secure connection between capsule and preamp *Note: As with all bidirectional microphones, sounds picked up from the back will be out of polarity with the source. You must use a balanced microphone cable: XLR-to-XLR or XLR-to-TRS. Optional Accessories Cardioid Capsule Supercardioid Capsule Bidirectional Capsule Omnidirectional Capsule Beta 181 Preamp Universal Microphone Mount 7. 6 m (25 ft. ) Cable RPM181/C RPM181/S RPM181/BI RPM181/O RPM181/PRE A75M C25E SPECIFICATIONS Cartridge Type Polar Pattern Electret Condenser 181/C: 181/S: 181/O: 181/BI: 20 to 20, 000 Hz 110 Cardioid: Supercardioid: Omnidirectional: Bidirectional: 2500 load: ­46. 5 dBV/Pa[1] (2. 4 mV) ­49. 5 dBV/Pa[1] (2. 5 mV) ­52. 0 dBV/Pa[1] (2. 6 mV) ­51. 0 dBV/Pa[1] (2. 6 mV) Cardioid: Supercardioid: Omnidirectional: Bidirectional: Cardioid: Supercardioid: Omnidirectional: Bidirectional: 73. 5 dB 71. 5 dB 70. 5 dB 71. 0 dB Cardioid: Supercardioid: Omnidirectional: Bidirectional: Cardioid: Supercardioid: Omnidirectional: Bidirectional: 10. 5 dBV 7. 5 dBV 20. 5 dB SPL-A 22. 5 dB SPL-A 23. 5 dB SPL-A 23. 0 dB SPL-A 131. 0 dB 132. 0 dB 133. 5 dB 133. 0 dB 128. 5 dB 129. 5 dB 130. 5 dB 130. 5 dB 151. 5 dB SPL 154. 5 dB SPL 157. 0 dB SPL 156. 0 dB SPL 149. 0 dB SPL 152. 0 dB SPL 154. 0 dB SPL 153. 5 dB SPL Cardioid Supercardioid Omnidirectional Bidirectional CERTIFICATION Frequency Response Output Impedance Sensitivity open circuit voltage, @ 1 kHz, typical Maximum SPL 1 kHz at 1% THD[2] 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. [. . . ] 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. 1000 load: Signal-to-Noise Ratio[3] Dynamic Range Cardioid: Supercardioid: Omnidirectional: Bidirectional: 2500 load: 124, 46 mm (4. 90 in. ) 20, 32 mm (0. 80 in. ) 34, 54 mm (1. 36 in. ) 1000 load: Clipping Level @ 1 kHz, 1% THD Self Noise equivalent SPL, A-weighted, typical Common Mode Rejection 20 to 20, 000 kHz Polarity Power Requirements Net Weight [1] 2500load: 1000load: Cardioid: Supercardioid: Omnidirectional: Bidirectional: 55dB Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 11­52 V DC[4] phantom power (IEC-61938) 2. 4 mA, maximum 145 g (5. 1 oz. ) 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. [. . . ]