M9
Common name: CAD Audio M9
Production Status: Discontinued / Vintage
The M9 is a cardioid single tube externally-biased condenser microphone that features servo-valve technology. The M9 is a natural bridge between the valve technology developed for the VX2 microphone and the servo opamp technology developed for the M-Series microphones. The head amp in the M9 microphone is a 12AX7 tube optimised for super wide dynamic range and low noise. The output stage is a high speed dual opamp in a balanced differential configuration that allows long cables to be used without affecting microphone performance. This first version employs USA made CAD Optema capsules (K67 type).
Electrical Characteristics
Frequency Response
10Hz - 20 kHz
Output Sensitivity
22.5 mV/Pa
Max SPL
138.5
Max SPL, THD:
0.2
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
15 dB-A
Output Impedance
200Ω
Recommended Load
Powering
Proprietary unit
Supply Current
mA
Alternative Powering
Tube Model
ECC83/12AX7
Tube Brand
Sovtek
Switchable Options
Pad
16dB
Filter/EQ
100Hz -3dB
Physical Characteristics
Connector
7-pin
Connector notes
(XLR -7 at microphone)
Available Colours
Blue
Weight
500 g
Length
175 mm
Min diameter width
Max diameter
50 mm
Depth
55mm
Accessories
Included
Shockmount, swivel adapter, power supply, road case
Optional