Confluence was started in 1983 by Christian Gerhards, an ex-teacher whose passion for music got him into speaker design. The company survived until 2001 when it became Soneco. All the models share the same design principles of cabinets with non parallel faces and rectangular port(s) at the bottom. They mostl use double coil Focal drivers and a rare Audax tweeter, derived from the famous TW51 with a small rectangular horn in front. GUY HF manufactured the cabinets for these speakers from 1991 to 2001 and then Ets Berthommé in Availle (Limousin) took over. The Cantilene has been the most successful model commercially.
I will make a particular mention of a model that was not a success, more an experiment.
I am talking about the Chimère, a 125kg monster with no money spared and amazing design principles. First is the use of a Phy-HP full range driver with an open back, second a piezo tweeter from Audax all in separate cabinets, the midrange one being supported via its own invisible metal stand and supporting cones, going through, but decoupled from the subwoofer cabinet. and finally cut-off frequencies of the crossover at 150 Hz towards the 34cm Focal bass driver and 6Khz to the piezo tweeter. See photos and diagram below. The crossover is in a separate and external box. Apparently, only three pairs were ever manufactured...
Interestingly enough, Jean-Paul Guy had designed an adjustable panel to form a variable tuned port on a previous model, and this was used on the subwoofer here as well. But the most amazing part of the story is that some years later, this idea was used again with some of the same drivers by no other than Ocellia! Phy-HP full range, piezo tweeter AND adjustable port...
And BTW, these were some of the most amazing speakers I had a chance to listen to in my long hifi life, so I can only imagine how good the Chimère might have been! This "money is no object" design was turned into a more commercially minded product, the Cantilène III, using all Audax drivers, 2x17cm AM170G8 and one textile dome tweeter the famous TM 025 C1.
This is probably the last known design by Confluence in 2001. I should now pay tribute to Raymont Lerat and Christian Quest for their excellent "virtual museum" on all things Confluence.
Even if you don't read French, most of technical details will be obvious to the keen hifi nerds that you are and I will thank them for all the photos in this article. Here is the link:
Born in France, well travelled, relocated to Sydney in 1997.