Bock 251
7490 €Primary use:
Type:
Polar patterns:
Common name: Bock 251
Production Status: In production
The Bock 251 is a large diaphragm studio microphone that emulates a vintage 251. The design uses a hand-wound multi-section transformer. This is over-sized to provide very low distortion at extreme LF. Distortion is primarily 2 nd harmonic and rises relatively slowly (2% @129 dB). The capsule is a German 1″ dual diaphragm design with an asymmetrical C12-like back-plate. The tube electronics are based on a GE5670 with a resistive, rather than transistor, load. Polar patterns are switchable.
Electrical Characteristics
Frequency Response
2Hz - 2 kHz
Output Sensitivity
19 mV/Pa
Max SPL
118
Max SPL, THD:
1
Self Noise (CCIR)
32 dB
Self Noise (DIN/IEC)
18 dB-A
Output Impedance
200Ω
Recommended Load
1.2kΩ
Powering
Supply Current
1 mA
Alternative Powering
Tube Model
ECC81/12AT7/6201
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
6-pin
Connector notes
Available Colours
16
Weight
716 g
Length
216 mm
Min diameter width
Max diameter
52 mm
Depth
Accessories
Included
P251 supply, cables, shock mount
Optional