This time, I focus on DS-3000. It was made 20 years before, in 1984.
	This model is kind of improved model of DS-505(4 ways bookshelf type). It is heavy, weight is 52 kg.
Mid-high and high are DUD units.
	DS-3000 has this model only.
DUD means Diatone Unified Diaphram.
	I think DS-3000 is one of the masterpiece in Japan.