คำอธิบาย
| Microphones | |
|---|---|
| Element | Fixed-charge back plate, permanently polarised condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 30 – 20,000 Hz |
| Open Circuit Sensitivity | Phantom: -42 dB (7.9 mV) re 1V at 1 Pa Battery: -43 dB (7.0 mV) re 1V at 1 Pa |
| Dynamic Range | Phantom 109 dB 1kHz @ Max SPL, Battery 99dB 1kHz @ Max SPL |
| Signal-to-Noise Ratio | 70 dB 1kHz @ 1 Pa |
| Phantom Power Requirements | 11-52V DC, 2 mA typical |
| Battery Type | 1.5V AA/UM3 |
| Battery Current/Life | 0.4 mA / 1200 hours typical (alkaline) |
| Switches | Off, on-flat, on-roll-off |
| Weight | 131 g |
| Cable | 3m long (permanently attached to microphone), 3.2mm diameter, 2-conductor shielded cable with TA3F-type connector |
| Dimensions | Length 421mm, Head diameter 12.2mm |
| Output Connector | Integral 3-pin XLRM-type |
| Accessories Included | AT8531 power module, AT8153 two-stage foam windscreen, AT8663 A-mount flange, AT8664 A-mount cable pass-through adaptor, battery |
Features
Engineered for versatile positioning and extremely flexible performance in boardroom, school, government, house-of-worship and other installed applications, the U857AL features a small-diameter gooseneck with virtually no “memory.” Its ultra-flexible, robust design permits easy adjustment into desired shape while resisting inadvertent repositioning. This cardioid condenser gooseneck microphone direct mounts to any 5/8″-27 stand; it is 16.58″ long. Equipped with UniGuard® innovations that offer unsurpassed immunity from radio frequency interference, the U857AL accepts interchangeable elements, available in cardioid, hypercardioid, omnidirectional and UniLine™ line cardioid polar patterns. The battery- or phantom-powered microphone also offers an 80 Hz low-cut UniSteep® filter that reduces pickup of low-frequency ambient noise.
