Equipment Emporium, Inc.
Articles, information, and services on production sound recording for motion pictures, video, film, television.
http://www.equipmentemporium.com/

Internet Sound Institute
Learn about sound systems and operational techniques and how to use sound equipment.
http://www.soundinstitute.com/

Rat Sound Systems Inc.
Rat Sound Systems, Inc.
http://www.ratsound.com/

Wild Sound
Provides full recording service. Features the equipment and know how to make music sound its best. Also offers surround sound mixing, video and DVD production as standard service. Based in Minnesota, USA.
http://www.wild-sound.com/

BBE Sound
Makes professional processors and equipment and consumer sound processors and game console sound optimizer. USA.
http://www.bbesound.com/

CooolSoft
power mp3 wma wav converter recorder and cutter tools, avi dvd burner free download
http://www.cooolsoft.com/

Art Ludwig's Sound Page
All aspects of sound; music, human hearing, sound system design. Room acoustics. A non-mathematical description of sound, and also a rigorous mathematical derivation based on molecular statistics.
http://www.silcom.com/~aludwig/

Sound Hire
Pro audio equipment hire, Digico, Midas, Meyer, DPA, Schoeps Concert touring sound systems and sound engineering.
http://www.sound-hire.com/

Intrak Sound and Light
Provides sound and lighting equipment for hire, sale or installations in the UK.
http://www.kev-martin.pwp.blueyonder.co.uk/

MAC Sound
UK based company offering professional sound equipment and PA hire, for productions ranging from amateur theatre pantomimes to rock festivals and West End musicals.
http://www.macsound.co.uk/