An audio speaker system has at least one expandable speaker enclosure which comprises a rigid upper wall, a speaker mounted to the upper wall and a rigid bottom wall. One edge of the bottom wall is pivotally attached to a corresponding edge of the upper wall. Flexible side walls interconnect the...http://www.google.ca/patents/US5732140?utm_source=gb-gplus-sharePatent US5732140 - Acoustic speaker system with expandable speaker enclosure
