Xtra Low Microphonic.
This Tube design has short plates to help reducing microphonics and noise. They are great as phase inverters and reverb drivers.
Mic Pre / Vacuum Tube Compressor
Parametric Equalizer Materig version
Tubeshield 9 pin.
Or 6BQ5. Excellent replacements in vintage VOX AC-30’s. Sold matched pairs or quad.
The M 149 Tube is a variable dual-diaphragm microphone. The K 49 capsule – well-known from the legendary U 47 and M 49 microphones – is followed by a tube functioning as an impedance converter.
Opto Moto Compressor Tubes