TB12 500

Tone Shaping Microphone Preamp

Discrete 312 preamp design with coupled CineMag Transformers
71db of gain
Transformer selection provides both Steel and 50% Nickel CineMag output transformers for varying character
Transformer bypass switch allows for removal of the output transformer from the circuit
Discrete Opamp selection provides both the classic 1731(vintage) and 918(cleaner) style opamps. These are socketed/swappable with your choice of 2520 6 pin footprint opamps.
Impedance switch labeled TONE to switch between 150 and 600 ohms input impedance
Capacitor selection between Tantalum and Electrolytic for different characters

http://www.warmaudio.com/products/tb12-500-series-tone-shaping-microphone-preamp/