BK-4A
Common name: RCA BK-4A
Production Status: Discontinued / Vintage
The BK-4A is a compact and light weight omnidirectional ribbon microphone for music and voice pickup in television and broadcasting applications. It can be used handheld or on a stand. The rugged construction makes it insensitive to mechanical shocks. Finished in non-reflective TV grey. Includes 30 feet three conductor shielded cable.
Electrical Characteristics
Frequency Response
70Hz - 15 kHz
Output Sensitivity
1 mV/Pa
Max SPL
Max SPL, THD:
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
dB-A
Output Impedance
30/50/250Ω
Recommended Load
1kΩ
Powering
Supply Current
mA
Alternative Powering
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
Open ends
Connector notes
Available Colours
Non-reflective grey.
Weight
425.24 g
Length
304.8 mm
Min diameter width
22.22 mm
Max diameter
31.75 mm
Depth
Accessories
Included
30 feet three conductor shielded cable.
Optional