The Raidho Ribbon tweeter FTT75-30-8 is a unique sealed ribbon tweeter. The tweeter employs an array of neodymium magnets to create an extremely powerful force field where an ultra thin membrane is suspended. The membrane weighs less than 0.02 g. Due to low mass the tweeter stores no energy and has no resonances. The performance is extraordinaire and the tweeter leaves absolutely no fingerprint on the speaker system.