Condition summary: one tested and working, other untested due to broken terminals, boxes not salvageable, crossovers/wiring included. Use case: restoration projects, parts harvesting, experimentation. Condition Disclosure: These amplifiers were pulled from AR P428PS speakers. One tested and working; others untested due to broken terminals. Boxes not salvageable, but crossovers and wiring included. Crossovers and wiring bagged separately, double-boxed for safe transit.