New UA Universal Audio Bock 251 Large-Diaphragm Multi-Pattern Tube Condenser Microphone

In 2020, UA enlisted David Bock of Bock Audio to design a new line of premium tube and FET condenser microphones based on his most cherished designs.

Manufactured in Santa Cruz, California, The UA Bock 251 is a large-diaphragm, multi-pattern tube condenser microphone built with high-quality through-hole components and timeless UA design for the professional engineer and recording artist.

• Trust your sound to a premium studio mic, lovingly handmade at the UA Custom Shop in Santa Cruz, CA
• Enjoy "golden-unit" consistency with every Bock 167 mic hand calibrated by David Bock
• Get the sound of one of the most treasured mic designs in history, updated and overbuilt to a higher standard
• Experience boutique UA quality including premium capsules and handwired components to last a lifetime
• Included Accessories
• Shockmount
• Power supply
• 20’ cable w/ Tuchel connectors
• Signature wooden box
• Suitcase

• Type: Tube Condenser
• Polar Pattern: Cardioid, Omnidirectional, Figure-8
• Frequency Range: 10 Hz - 18 kHz
• Sensitivity: -34 dB (19 mV) ref 1V at 1 Pa, 1 kHz
• Self-Noise: 18 dBA
• 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 asymmetrical backplate (Dual diaphragm CK12 type)
• Tube: New Old Stock ECC85
• Power Supply: UA Bock 251 PS true linear, 115V (default) or 230V operation
• Phantom Power Requirements: N/A
• Adjustable Controls: Polar pattern selector
• Connectors: Tuchel (6-Pin Mic), 3-Pin XLR (PSU)