Macintosh TV
Introduced in October 1993, the Macintosh TV has a black 520 case with a modified variant of the yet-to-be released Macintosh 550 logicboard, which filled the LC PDS slot with a custom TV tuner card integrating video inputs. Despite the updated 32MHz processor speed, the bus speed was cut in half (but can be changed from 16-bit to 32-bit by the control panel "Memory") and RAM was limited to 8MB. Selling fewer than 10,000 units, it was discontinued in February 1994 with the introduction of the LC 550, which it most closely resembled.
Read more about this topic: Macintosh LC 500 Series