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Bock Audio 507 Studio Tube Cardioid Microphone Inc. PS, Cable & Suspension - B-Stock

£5,100.00 inc. vat
£4,250.00 ex. vat
In Stock - Order by 3:30pm to ship today.

Bock Audio 507

The Bock Audio 507 is a high-end, tube condenser vocal microphone combining a new unique elliptical capsule design and a vintage style mic amplifier and power supply. The Bock 507 includes cradle, PSU and cable.

This is a B-Stock item and is in excellent condition with no damage or faults, still covered by full warranty as if new.

The 507 has a fixed cardioid response with a carefully crafted proximity effect for closer, intimate performances. The 507 will compare favourably to the best vocal microphones past and present. Housed in a large form body type, the headgrille has 3 layers to prevent dirt and moisture from coming in contact with the capsule, and thus increasing the lifespan and long term sound of the mic. A high gain, vintage 47 inspired tube mic amplifier with no negative feedback or filtering is used alongside a US handmade Bock design four section transformer. The custom Bock power supply is included.


  • Patterns: Cardioid, omni, Figure of 8 Switchable from mic
  • 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, and 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