Links to other Quadraphonic sites

www.quadraphonicquad.com

Quadraphonic Quad
the biggest site of Quadraphonic in the net

www.surrounddiscography.com

Surround-Discography-Homepage
Directory of almost all quadraphonic productions

www.quadrafonie.nl

The Quadraphonic site of the Netherlands

http://www.involveaudio.com/

Involve Audio fabricats a new Surround-Decoder with SQ decoding funktion.