Panasonic LX-1000 with AC-3 module mounted via double-sided tape...

Pioneer CLD-M301 with AC-3 upgrade installed

RCA Connector on the back of a CLD-D501 (AC-3 RF port between words Digital Out and Audio Out)

Pioneer CLD-D501 with AC-3 kit installed. Module mounted on metal mounting bracket.

Pioneer CLD-D503 with AC-3 kit installed. Module mounted to convenient metal tab on the player frame.

Pioneer CLD-97 with AC-3 kit installed. Module mounted via existing screw.

Panasonic LX-900 with AC-3 module mounted via double-sided tape...

Kenwood LVD-320 No easily locatable landmarks on back side of board...