Daedalus Audio - Ferndale, Washington United States  (view )
David Berning - Potomac, Maryland United States  (view )
deHavilland Electric Amplifier Co. - Vancouver, Washington United States  (view )
Departure Audio - Fort Collins, Colorado United States  (view )
DEQX Pty Limited - Brookvale, New South Wales Australia  (view )
Discovery Cable - Stuart, Florida United States  (view )
Divergent Technologies Inc. - Waterloo, Ontario Canada  (view )
DNM Design - Huntingdon, Cambridgeshire United Kingdom  (view )
Dodd Audio - Garland, Texas United States  (view )
Dr. Feickert Analogue - Sölden, Bayern Germany  (view )
DSPeaker - Tampere, Ahvenanmaan Laani Finland  (view )
Duelund Coherent Audio - Copenhagen, Copenhagen Denmark  (view )
Dynamic Design Corp. - Chicago, Illinois United States  (view )
Dynaudio - Bensenville, Illinois United States  (view )
Dynavector USA - St. Louis, Missouri United States  (view )