Features:
- Rich, natural condenser-like sound
- Large diameter diaphragm with patented floating-edge construction for optimal performance
- Humbucking coil prevents electromagnetic interference (EMI)
- Optimized capsule placement for commanding vocal presence even at a distance
- Hypercardioid polar pattern provides maximum feedback rejection and isolation of desired sound source
- Switchable 100 Hz high-pass filter
- Multistage windscreen provides superior internal pop filtering
- Rugged, all-metal construction for dependable use in professional broadcast environments
The BP40 is a large-diaphragm dynamic microphone with a hypercardioid polar pattern. It is designed for use as a broadcast vocal microphone.The hypercardioid polar pattern of the microphone is more sensitive to sound originating directly in front of the element, making it useful forcontrolling feedback and reducing pickup of unwanted sounds. The output of the microphone is a 3-pin XLRM-type connector. The microphone is equipped with a switch that permits choice of flat response or low-frequency roll-off (via integral 100 Hz high-pass filter). The microphone is enclosed in a rugged housing with a multistage windscreen. The capsule is set back from the screen to provide a more consistent response. The included AT8483 mounting clamp fits any microphone stand with 5 /8"-27 threads. A soft protective pouch is also included.
Operation and Maintenance
Output is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is "Pin 2 hot"- positiveacoustic pressure produces positive voltage at Pin 2. To avoid phase cancellation and poor sound, all mic cables must be wiredconsistently: Pin 1-to-Pin 1, etc. An integral 100 Hz high-pass filter provides easy switching from a flat frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as traffic, air-handling systems, etc.), room reverberation and mechanically coupled vibrations.To engage the filter slide the switch toward the "bent" line. Take care to keep foreign particles from entering the windscreen. An accumulation of iron or steel filings on the diaphragm, and/or foreign material in the windscreen's mesh surface, can degrade performance.
For more information, please see 
Data Sheet
