Links to other Quadraphonic sites
The Quadro-Surround-Musicproduction
An own Label for the Quadraphonic and Surround-Fans
Music for the fans from the fans
Quadraphonic Quad
the biggest site of Quadraphonic in the net
Surround-Discography-Homepage
Directory of almost all quadraphonic productions
The Quadraphonic site of the Netherlands
Involve Audio fabricats a new Surround-Decoder with SQ decoding funktion.