BETA 54 Specification
| Cartridge Type | Condenser (electret bias) |
| Frequency Response | 20 to 20,000 Hz |
| Polar Pattern | Supercardioid |
| Self-Noise | 43.1 dB SPL(A-Weighted) |
| Signal-to-Noise Ratio | 55 dB at 94 dB SPL |
| Recommended Minimum Input Impedance | >1 kΩ |
| Preamp Output Impedance | 136 Ω |
| Sensitivityopen circuit, ref. 1v/Pa at 1 kHz | -56.0 dBV/Pa (2.51 mV) |
| Maximum Sound Pressure Level | 141.4 dB SPL at 1% THD/1 kΩ load |
| Dynamic Range | 110 dB (max. SPL with 1k load, minus typical A-wt. noise) |
| Current Drain | 4.6 mA (preamp and microphone) |
| Output Polarity | Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 at the output
connector of the preamp |
| Power Requirements | Phantom power; 11 to 52 Vdc positive
on pins 2 and 3, return on pin 1 (ground) |
| Net Weight | 135.35 g (4.75 oz.)
microphone and in-line preamp |
| Cable | 1.5 m (5 ft.), small-diameter, shielded, with mini 4-pin connector (TA4F) |
