VSM
Common name: CAD Audio VSM
Production Status: Discontinued / Vintage
The VSM (also known as the VSM-1) is a large diaphragm cardioid vacuum tube microphone. It features a CAD Optema series 1″ OS 110 brass capsule with 3 micron thick, 24K gold sputtered diaphragm. The amplifier circuit is based around a 12AX7 capsule driving a high speed dual operational amplifier arranged in a balanced differential configuration. The microphone features a -8 or -16 dB attenuation pad and a 80 Hz, 3dB/oct. low-cut filter. It is ideal for vocals. acoustic piano, guitars and strings. Includes shock-mount, power supply and 30 foot microphone cable.
Electrical Characteristics
Frequency Response
10Hz - 20 kHz
Output Sensitivity
22.4 mV/Pa
Max SPL
133
Max SPL, THD:
0.5
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
15 dB-A
Output Impedance
200Ω
Recommended Load
1kΩ
Powering
Supply Current
mA
Alternative Powering
Tube Model
ECC83/12AX7
Tube Brand
Sovtek
Switchable Options
Pad
8dB, 16dB
Filter/EQ
80Hz, 3dB/oct.
Physical Characteristics
Connector
7-pin
Connector notes
Available Colours
Matte Grey
Weight
900 g
Length
174 mm
Min diameter width
58 mm
Max diameter
73 mm
Depth
Accessories
Included
Shockmount, power supply, road case
Optional