Barbaric Amplification - Another custom BA-49. This one has a Thiersch M7, a 5840W tube and a AMI BV8R. Crisp on top and creamy on the inside. | Facebook
Klar Audio M49 (Neumann) – Thiersch M7 capsule, AMI BV11r transformer, hand-built PSU, NOS tube | Reverb
LEWILSON 247C Röhrenmikrofon mit Thiersch M7 Kapsel