Abstract: An improved speaker enclosure for providing an acoustical balanced output with improved audio quality at low level reproduction. The enclosure includes a low sonic frequency pressure induced sonic wave amplification resulting from in phase reflection mechanically of re-induced resonant pressure waves. The invention comprises a speaker chamber of improved construction, the speaker being placed across one end, with the opposite end of the chamber being closed by an elastic diaphragm having an acoustic non-resonant tube centrally disposed protruding into the chamber, allowing the flow of air from inside the chamber enclosure to the outside atmosphere.