Check the listing for details. Luxman AS-55 Speaker Selector / 3 Line Switching Passive High Definition Audio. Color: Beige, Condition: Used. Listed at 411.83 USD. The AS-55 is a speaker terminal type passive high-grade audio selector capable of switching up to three audio devices.It has the same grade configuration as a high-grade separate amplifier, including a highly rigid aluminum housing, a high-capacity 20A rotary switch for signal switching, and 6N (99.99997% copper) wire for wiring material for purity and low information loss. For speaker terminals, high-purity gold-plated types compatible with discrete wires, Y-lugs, and banana terminals are used in a thorough pursuit of high sound quality. By connecting this unit between an amplifier and speakers, it can be used as an amplifier or speaker selector for up to three amplifiers. eBay listing template by 3Dsellers.com - Try for Free!