Datasheet - Stk411-210e

Typically operates with a supply voltage around ±40V , providing high dynamic range and headroom.

Housed in a ZIP-22 (Zig-Zag In-line Package) or DIP-22P module, which facilitates easy mounting on a heatsink. Stk411-210e Datasheet

The module includes internal driver stages, biasing circuits, and muting capabilities to eliminate "pop" noise during power-up. Typically operates with a supply voltage around ±40V

The STK411-210E was a staple in 1990s and early 2000s audio equipment but has since been by Sanyo/Panasonic. Stk411-210e Datasheet

It remains highly sought after for repairing vintage AV receivers and for DIY audio enthusiasts who prefer its "warm, musical" analog sound profile over modern Class-D alternatives.