Universal Audio Bock 251

Universal Audio Bock 251 – Flagship Tube Condenser Microphone

The Universal Audio Bock 251 brings the sound of one of the most revered vocal microphones ever made into the modern studio. Handbuilt in UA’s Custom Shop and inspired by the iconic ELAM 251, this premium large-diaphragm tube condenser mic delivers a smooth, open, three-dimensional tone with extended frequency response and unmatched craftsmanship. A NOS ECC85 tube, German-made CK12 capsule, and Cinemag transformer ensure rich warmth and detail, while modern reliability updates make it ideal for today’s high-end recording environments.

Key Features

• Authentic 251 character: Open, airy highs, full midrange, and detailed lows for timeless vocal recordings.
• Premium components: NOS ECC85 vacuum tube, CK12 capsule, and Cinemag transformer for world-class vintage tone.
• Selectable polar patterns: Cardioid, omni, and figure-8 modes for vocals, room capture, duets, instruments, and ensembles.
• Modern enhancements: Improved SPL handling (up to 118 dB) and long-term reliability over vintage originals.
• Handbuilt quality: Fully handwired with meticulously tested components for lifelong performance.

Customer Benefits

The Bock 251 gives artists and engineers the unmistakable sound associated with legendary recordings—smooth, rich, and effortlessly musical. Its flexible polar patterns and extended frequency response make it not only a vocal masterpiece but also a stunning choice for acoustic instruments, strings, ambient room miking, and lush stereo setups. It’s a professional, heirloom-grade microphone built to elevate any studio.

Quick Specs

• Microphone type: Large-diaphragm tube condenser
• Polar patterns: Cardioid, Omni, Figure-8
• Frequency response: 10 Hz – 18 kHz
• Max SPL: 118 dB
• Tubing: NOS ECC85 vacuum tube
• Capsule: German-made CK12
• Transformer: Cinemag output transformer
• Connector: 7-pin XLR (external PSU required)

What’s in the Box

• Bock 251 microphone
• Dedicated external power supply
• High-grade shockmount
• Premium vintage-style suitcase
• 7-pin XLR cable

Use Cases / Ideal For

Lead vocals, backing vocals, voice-over, acoustic guitars, strings, room miking, orchestral ambience, and high-end studio applications.

Compatibility

Works with any professional interface or preamp featuring mic-level inputs. Requires the included external power supply.

Pros & Cons

✅ Pros:

• Exceptional vintage-style tube tone with modern reliability
• Premium handbuilt design with top-tier components
• Flexible polar-pattern selection for multiple studio applications

⚠️ Cons:

• Requires external PSU and careful handling
• Premium price positioned for professional users