Topology:
Octal: dual gain stage conforming to 6SN7 pinout, pins 1/8 unconnected
Applicable to:
Octal: Schiit Saga+, Freya+, Lyr 3
Do not use in: any other manufacturer’s amp (no guarantees they’ll work, or survive)
Protection: overvoltage protection for gate to source (static, hot-plugging, etc), abuse telltale