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.
Getting Bored (and Why That’s Not a Bad Thing)
Getting bored with a system that sounds right is an uncomfortable realization. My GPA/Altec 604s aren’t doing anything wrong—but they’ve stopped provoking questions. This post is about that moment, the need to keep experimenting, and why it has led me away from familiar ground toward smaller bass drivers, larger multicell horns, and the historical thinking behind the Petite Onken and the writings of Jean Hiraga.
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
Welcome to the listening room
So what is “The listening room” and why are you welcome? The Listening room is exactly that – my Listening room, living room or garage or workbench. This little sub-blog is just a place for me to share thoughts, ideas and what is going on in my little world, without having this opinionated dump of …
JBL Amplifiers and SE-408S
JBL is most known for their massive array and presence in home and pro audio. Especially their home and pro audio from the 1960’s and 70’s. We are talking some of the most renowned and well-known studio monitors and home speakers, including the before-covered JBL L-100 Century (read more here: JBL L-100 Speakers – An …
Vintagehifi.dk meetup 2023
The 2023 Vintagehifi.dk annual meetup was held at Hald Manor House and featuring setups from America, Britain and Denmark from horns to studio monitors to old cinema equipment.
Accuphase – The Very Early History.
The very beginning This article is about the audio brand Accuphase and the first products they brought to market. Accuphase is interesting for 2, closely related, reasons; one is that they are known for impeccable quality both in build quality and sound reproduction. Second they are one of the very few audio companies that has …
Tonearm resonance theory – or how I learned to stop worrying and love the heavy Japanese arms.
So you have a turntable with a tonearm and a cartridge and you are wondering if the combination of tonearm and cartridge are performing as they should. You might be able to enjoy your music, but you wonder if there an option to tweak the system by either upgrading the cartridge, tonearm or the entire …