DS Audio DS-E3DS E3 Truly beyond price. The DS E3 is a revolutionary technology in historic record reproduction. Ikuo Tsunoda, Audio Critic Details Uses a third generation optical cartridge mechanism The DS E3 uses a third generation optical cartridge mechanism, the same design as our other products. The DS E3 achieves an overwhelmingly low price while inheriting the merits of the third generation mechanism, such as higher output due to independent LED and PD,