Yamaha Speaker System YST-SW150

Yahama Active Servo Processing Subwoofer System. This is a used YST Speaker System that is in good working condition with a high-cut continuously variable frequency system and phase changeover switch for matching room conditions. Features an auto power On-Off function based on a signal input and provides both a speaker input and a pin-jack input. This System includes 1 NS-AC2A speaker and 2 NS-A76A speakers.