M.I.T
Mit cables - absolute best high end audio cables, speaker cables, video cables, hdmi cables, interconnects, interfaces and in-wall power filters for high end reference components, audio, video, digital, home theater, and studio recording
http://www.mitcables.com/
Neutrik
Neutrik is the leading manufacturer of audio connectors and receptacles. neutrik produces xlr, plugs, jacks, speaker and power connectors, patch panels, 75 ohm bnc, industrial and rca connectors.
http://www.neutrik.com/
Siltech
Siltech cables, the best in audio and video cables, using new technologies. siltech is clearing the way to noisefree recording.
http://www.siltechcables.com/
Van den Hul
van den Hul
http://www.vandenhul.nl/
Whirlwind
Whirlwind
http://www.whirlwindusa.com/