Where can I find good and low-noise tubes for tube microphones and tube preamps?

BTB supplies high-quality and selected tubes for many tube microphones and tube preamps, for example from Neumann, Microtech Gefell, AKG, Brauner, ADK and Telefunken. Especially in such applications, low noise, low microphonics, stable behavior and clean selection are particularly important. Typical tubes here include EF86, EF806s S4GB, AC701, 5840, EF732, EF95, ECC83 / 12AX7 S4GB Clean and other selected microphone tubes. This is exactly what we pay attention to at BTB.