External preamplifier in XLR conector.
Extra gain of 30 dB @ 3000 ohms load.
Clarity of sound.
Low harmonic distortion.
No capacitors or inductors in the path.
Versions in 4k7 and 22k input impedance. For damping control.
Phanton powered 48V. Below 4 mAmp consumption.
Nickel bath plug.
Protect your microphone ribbon preventing breakage.
Avoid transformer magnetizing phantom problems.
Very useful also in dynamic microphones.