A reference overview of Jensen’s Bass Ultraflex enclosures from Jensen Hi-Fi Speaker Systems (1956), treating the 15″, 12″, and 8″ cabinets as one scaled design family defined by fixed internal volume and duct geometry.
Mini-Onken – Jacques Mahul, L’Audiophile 1982
In 1982, Jacques Mahul explored how the classic Onken bass-reflex principle could be reduced in scale without losing musical integrity. This article—faithfully translated from L’Audiophile—details the Mini-Onken enclosure, its theoretical foundations, precise calculations, and the development of the Focal 10C01, offering rare insight into the transition from Japanese Onken designs to what would later become Focal/JMLab.
Construction of the ONKEN bass enclosure – Jean Hiraga, L’Audiophile 1977
Jean Hiraga’s 1977 article on the ONKEN bass enclosure is a landmark text in high-efficiency loudspeaker design. This faithful English translation presents the original construction details, measurements, and listening observations, allowing modern readers to engage directly with Hiraga’s approach to bass reproduction.
Le Petite Onken – Jean Hiraga, L’Audiophile 1982
The Petit Onken article published by Jean Hiraga published in L’Audiophile no.25. september 1982 translated to english