Dali Loudspeakers Daluso Danish Audio ConnecT (DACT) Danley Sound Labs Dared Tube Davidson-Whitehall Furniture DaVinci Audio Davis Acoustics DCM Corporation dCS Decware Definitive Technology deHavilland Delta Studio Denon Densen Audio Technologies Design e DEQX DeZorel Devore Fidelity DH Cones DH Labs Diablo Acoustics Diapason Digidesign Digigram Digital Adrenaline Dignity Audio Discovery Cable Diva Audio DIY Cable DLS DNM Design D Dodson Audio Dolby Labs D+S Sound Labs dts DDuevel Loudspeakers Duntech Dynamic Precision Dynaudio Dynavector