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Bock Audio

BOC-251

Bock Audio 251 Large-Diaphragm Multi-Pattern Tube Condenser Microphone

The 251 is THE vocal sound people ask for, but the original (vintage) versions are 50+ years old and sound very different from one another. Repairing, rebuilding and “nursing” original 251’s has been David Bock’s work spanning over 30 years.


    • Bock Audio 251 PRODUCT FEATURES:

      The risk for a modern studio or end user to depend on a vintage mic on a daily basis is increasingly problematic. The 251 is David Bock’s answer to the vintage mic dilemma of getting “that sound” without the headaches. It is a premier lead microphone for premier voices. It is built to last and provide the studio and user with many years of daily,
      high end performance.
    • Bock Audio 251 TECHNICAL SPECIFICATIONS:

      Patterns: Cardioid, Omni, Figure of 8 [ADJUSTABLE]
      Frequency Range: 10Hz to 18kHz, +/-2dB
      Sensitivity: 19mv/Pa

      Equivalent Noise: 18dB [“A” Weighted] 32dB [Unweighted]
      Distortion vs.SPL @1kHz:
      112dB = 0.5% THD
      118dB = 1% THD
      129dB = 2% THD
      (increasing distortion is non-exponential, nearly linear, primarily 2nd harmonic)

      Impedance: 200 Ohms true transformer balanced
      Recommended load: 1.2k Ohms
      Dynamic range (maxSPL-"A"noise): 94dB
      S/N (94dB-noise): 76dB “A”, 62dB unweighted

      Capsule size: 1” diameter, dual asymmetrical backplate CK12 type
      Tube type: New Old Stock 6201
      Dimensions: 2” dia x 8.5” oal (52x216mm)
      Weight: 1lb 9.3oz (1.58lbs) =716g
      Shipping weight: 12 lbs
      Power Supply: P251 true linear, factory wired 115v or 230v operation
Need more info on the Bock Audio 251? Click HERE for the official product listing >>>