MD1a
Primary use:
Polar patterns:
Common name: Groove Tubes MD1a
Production Status: Discontinued / Vintage
The MD1a is a large diaphragm electret cardioid tube condenser microphone. It uses a 10 micron Primo made capsule and a 12AT7 tube. It is ideal for vocals and acoustic instruments. PS2M power supply, EC-1 M 9 pin microphone cable, MSC moisture proof case and ST-1 shock mount priced separately. The “a” versions feature a new amplifier circuitry to further reduce noise, increase headroom, high frequency response and lower total harmonic distortion than the previous ones.
Electrical Characteristics
Frequency Response
40Hz - 18 kHz
Output Sensitivity
50.1 mV/Pa
Max SPL
137
Max SPL, THD:
1
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
20 dB-A
Output Impedance
30Ω
Recommended Load
0.5kΩ
Powering
Proprietary unit
Supply Current
mA
Alternative Powering
Tube Model
ECC81/12AT7/6201
Tube Brand
GT Electronics
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
9-pin (Quick-Lok DB-9)
Connector notes
Available Colours
Nickel
Weight
Length
Min diameter width
Max diameter
Depth
Accessories
Included
Optional
PS2M power supply, EC-1 M 9 pin microphone cable, MSC moisture proof case and ST-1 shock mount.