This Sovtek 6SN7 tube is a small pre-amp dual triode, medium gain with an octal base. It is used as original equipment in many currently produced home audio tube amplifiers.
The M147 Tube is a vacuum tube condenser microphone with cardioid characteristic.
Mic Pre / Vacuum Tube Compressor
Dual Channel Tube Compressor
Used in microphones such as Neumann KM63, KM64 (U64), AKG C12 and AKG C28.
Vacuum Tube Equaliser
Or 6072EH. Or 6072EH