Bock Audio 151
Cardioid Tube Condenser Microphone
The Bock 151 is a fixed-cardioid large diaphragm tube condenser. Essentially a budget version of the flagship Bock 251, the 151 was designed for close-miked applications such as vocals.
It uses a proprietary, hand made capsule described as a “dual asymetrical-backplate CK12-type,” a proprietary hand-wound vintage style transformer, a NOS EF732 tube in the mic amplifier and a hand-built custom outboard power supply.
(Note: previous versions of this document identified the tube as a New Old Stock GE5670 triode; this was due to an error in documentation from the distributor for Bock Audio products. The tube in the 151 is an EF732.)
The “brite/normal” switch delivers two sounds in one mic:
- “Bright” allows unfiltered extended high frequency response that defines a modern high end condenser.
- “Normal” offers a less bright, more vintage style high frequency response more forgiving to sibilant singers and or voices that need a darker treatment.
The 151 uses US-made metalwork with a relatively utilitarian finish. The mic has been discontinued as of January, 2011, in favor of the new Bock 241, which uses imported metalwork that is closer to the Ela M 251 in appearance.
See also the Soundelux E251C, the original version of this mic design.
The Bock Audio 151 is also known as: Bock 151.
The mic was released in 2007.
Specifications
Frequency Response - CardioidClick Graph to Compare! |
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Pickup Patterns | Pads & Filters |
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Cardioid
(19 mV/Pa; 30 - 18,000 Hz) |
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Capsule Dimensions | Impedance | SPL/Noise |
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Diaphragm diameter: 25mm |
200 Ohms (Low) | Max SPL: 112 dB Self-noise: 18.0 dB(A) |
Weight | Length | Max Diameter | Interface(s) |
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694g (24.48oz) | 216mm (8.50'') | 52mm (2.05'') |
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Power Specifications |
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