UA Bock 251
Reach sonic nirvana.
- Large-diaphragm tube studio condenser mic, lovingly handmade at the UA Custom Shop in Santa Cruz, California
- Iconic, "golden unit" mic sounds with modern enhancements by David Bock
- Switchable omnidirectional, cardioid, and figure-8 polar patterns
- German-made CK12 capsule and Cinemag transformer
Details
Details
Reach Sonic Nirvana
Specifications
- Type
- Tube Condenser
- Polar Pattern
- Cardioid, Omnidirectional, Figure-8
- Frequency Range
- 10 Hz - 18 kHz +/- 2dB
- Sensitivity
- -34 dB/19 mV (0 dB = 1V/Pa @ 1kHz)
- Self-Noise
- 18 dBA
- Distortion vs SPL @ 1 kHz
- 112 dB = 0.5% THD 118 dB = 1% THD 129 dB = 2% THD
- Output Impedance
- 150 Ohms
- Recommended Load Impedance
- > 1.2K Ohms
- Maximum SPL
- 118 dB SPL, 1% THD
- Dynamic Range
- 100 dB
- Signal-to-Noise Ratio
- 76 dB
- Capsule
- 1" diameter Dual symmetrical backplate Dual diaphragm CK12 type
- Tube
- New Old Stock ECC85
- Connectors
- Tuchel (mic) 3-Pin XLR (power supply)
- Dimensions
- 8.5" (216 mm) length 2" (52 mm) diameter
- Microphone Weight
- 1.58 lbs (716 g)
- Shipping Weight
- 12 lbs (5.4 kg)
- Safety Standards
- UL 62368-2, EN 62368-1 Microphone input power: From UA BOCK 251 PSU
- Power Supply
- UA Bock 251 PSU Input: 100VAC 115VAC 230VAC Output: 130VDC @ 0.55mA 5.1VDC @ 332mA Maximum operating temperature 40°C Power Rating: 11.5W
- Power Supply Pinouts
- Pin 1: Case Pin 1: Audio (-) Pin 2: Audio (+) Pin 3: No Connection Pin 4: Heater (5VDC) Pin 5: B+ (130VDC) Pin 6: Ground Case: Shield