BETA 91
Common name: Shure BETA 91
Production Status: Discontinued / Vintage
The BETA 91 is a hemi-cardioid pattern instrument microphone. It has a frequency response shaped specifically for kick drums and similar instruments and is intended for close use. It has the ability to cope with extremely high SPL. With a 2.5 kΩ load the Max SPL is increased to 160dB. Replaced by the BETA 91A.
Electrical Characteristics
                                            Frequency Response
                                        
                                        
                                        20Hz - 20                                            kHz
                                        
                                    
                                            Output Sensitivity
                                        
                                        
                                            1 mV/Pa
                                        
                                    
                                            Max SPL
                                        
                                        
                                            156
                                        
                                    
                                            Max SPL, THD:
                                        
                                        
                                            1
                                        
                                    
                                            Self Noise (CCIR)
                                        
                                        
                                             dB
                                        
                                    
                                            Self Noise (DIN/IEC)
                                        
                                        
                                            35 dB-A
                                        
                                    
                                            Output Impedance
                                        
                                        
                                            150Ω
                                        
                                    
                                            Recommended Load
                                        
                                        
                                            1kΩ
                                        
                                    
                                            Powering
                                        
                                        
                                            
                                                                                Phantom 48 only
								                                            
                                        
                                    
                                            Supply Current
                                        
                                        
                                             mA
                                        
                                    
                                            Alternative Powering
                                        
                                        Switchable Options
                                            Pad
                                        
                                        
                                            Filter/EQ
                                        
                                        Physical Characteristics
                                            Connector
                                        
                                        
											                                            													TA3F												
                                        
                                    
                                            Connector notes
                                        
                                        
                                            Available Colours
                                        
                                        
                                            Matte black
                                        
                                    
                                            Weight
                                        
                                        
                                            382 g
                                        
                                    
                                            Length
                                        
                                        
                                            129 mm
                                        
                                    
                                            Min diameter width
                                        
                                        
                                            Max diameter
                                        
                                        
                                            95 mm
                                        
                                    
                                            Depth
                                        
                                        
                                            19mm
                                        
                                    Accessories
                                            Included
                                        
                                        
                                            Storage bag, preamplifier RPM626.
                                        
                                    
                                            Optional
                                        
                                        