we  mainly produce and operate high pitch louderspeaker vibrating membrane,sound-film assembly,professional sound fittings ,high power high pitch &low pitch voice coil and other various electroacoustic and electronic fittings.Our sound-film materials include titanium membrane,aluminium membrane,complex film,polyester membrane,cortina,silk membrane,PEN,PEI,PU composite membrane and other macromolecule sound membranes. with full product specificationa and categories,our products are widely applied to civilian loudspeaker,professional atage speaker ,HI-FI family cinema,multimedia,automobile horn and other industries.