Digging into another epoch.
It was called the HQ Symphony Quad and was listed on their site in the Kitesurf section. Target audience was buggiers and kitesurfers.
The closed cell system was called AVS (Air-Valve-System) which retained air as soon as the kite was inflated.
Canopy was made of combination of Ventex, Ventex Strong, and nylon.
Recommended lines were 170/80 kgs (which seems kind of weak these days.
Sizes listed were 2.5M, 3.5M, 5.0M, 6.5M. It's quite possible that the 8.5M existed prior to 2000 and was then phased out (in the same way that
Flexifoil phased out the Rage 6m).
It looks like the water version of the Symphony transitioned into the open cell foil around the same time that Invento-HQ started distributing Peter
Lynn Kites (2001/2002).
ATB,
Sam
"I never had any friends later on like the ones I had when I was 12 - Jesus, does anyone?" - The Body by Stephen King