Webshop | lefreQue, The missing link . Terms and conditions Become reseller Login. Contact. About lefreQue. Sound bridge Why a lefreQue What is a lefreQue Spectral ... Although seemingly a simple solution, the lefreQue sound bridge is a high tech product. It’s unique design is the result of many years of passionate scientific research and development. LefreQue sound bridges combine an unequalled acoustic performance with a universal and easy fit. All materials are carefully selected and partially hand crafted. I run a real OS, so I could safely view it without fear of infection. It's some sort of "acoustic coupler" voodoo. Mainly to join parts of a jointed together instrument like a sax or clarinet, particularly between mouthpiece and the rest. It's a piece of metal Feb 09, 2017 · AKCReview: LeFreque Sound Plates Review of the LeFreque sound plates for wind instruments, done on Euphonium. Includes a demonstration from the inventor of the LeFreque plates Hans Kuijt, as well ... Adams Musical Instruments, Concert percussion, slagwerk, schlagzeug, are the choice of world-class soloists, orchestras, composers, and educators alike because the craftsmanship, sound quality, and technical innovations are the highest quality specifications in the world making them truly world-class instruments.