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Universal Audio Bock 251

The Universal Audio Bock 251 is a premium large-diaphragm tube condenser microphone designed by renowned microphone engineer David Bock. Inspired by the legendary ELA M 251, one of the most revered microphones in recording history, the Bock 251 combines vintage tube microphone tone with modern precision manufacturing and upgraded components.

Each microphone is handbuilt in the UA Custom Shop in Santa Cruz, California, featuring a German-made CK12 capsule, a large Cinemag output transformer and a NOS ECC85 vacuum tube for authentic classic microphone performance.

With switchable polar patterns and extended low-frequency response, the Bock 251 is designed for premium vocal recordings and high-end studio applications.


Sound Character

The Bock 251 delivers a smooth, open tube sound with airy high frequencies and deep, full low-end response.

Its combination of CK12 capsule, tube circuitry and large output transformer produces a natural transient response and a wide, three-dimensional soundstage. The microphone’s extended low-frequency response down to approximately 10 Hz allows recordings to retain depth and weight.

This tonal character makes the microphone particularly suitable for lead vocals, acoustic instruments, strings and room recordings.


Highlights

✔ large-diaphragm tube condenser microphone
✔ inspired by the legendary ELA M 251 design
German-made CK12 capsule
NOS ECC85 vacuum tube circuitry
✔ large Cinemag output transformer
✔ switchable polar patterns Omni / Cardioid / Figure-8
✔ handcrafted in the UA Custom Shop (USA)
✔ extended low-frequency response down to 10 Hz
✔ includes external PSU, shock mount, cable and vintage case


Technical Specifications

✔ microphone type: large-diaphragm tube condenser
✔ polar patterns: omnidirectional / cardioid / figure-8
✔ frequency response: 10 Hz – 18 kHz (±2 dB)
✔ maximum SPL: 118 dB SPL (1% THD)
✔ sensitivity: -34 dB (19 mV/Pa)
✔ output impedance: 150 Ω
✔ tube type: NOS ECC85
✔ connection: Tuchel connector (mic) to XLR via PSU
✔ power supply: external PSU included

Hersteller:
Universal Audio Inc.
Hoeksteen 26F
2132 MS Hoofddorp
Netherlands
retailams@uaudio.com
www.uaudio.de


Sicherheits- und Warnhinweise:
Spezifische Sicherheitshinweise, die für das Produkt gelten, sind in der Bedienungsanleitung des Produkts zu finden.

Manufacturer "Universal Audio"

Universal Audio ist ein führender Hersteller von professioneller Audiotechnik, bekannt für seine hochwertigen Audiointerfaces, analogen Hardware-Kompressoren und Emulationen klassischer Studiogeräte. Seit den 1950er Jahren prägt Universal Audio die Musikproduktion durch innovative Technologien und erstklassigen Klang. 

Die Kombination aus analoger Hardware und moderner DSP-Technologie ermöglicht Musikern und Toningenieuren authentische und kreative Klangbearbeitung. 

Universal Audio steht für Qualität, Zuverlässigkeit und audiophile Exzellenz in Studios weltweit und bietet umfassende Lösungen für Recording, Mixing und Mastering.