Kemo l001 high freqeuncy piezo speaker kemo l001 this high quality piezo tweeter can be connected directly to an amplifier or diplexer the tweeter has a vaulted aluminium spherical cap and no conical membrane as is usual with flare loudspeakers due to the aluminium cap the acoustic pressure is not so strong as with comparable piezo tweeters but in return the loudspeaker has a very broad angle of radiation and a brilliant sound up to 45 000hz this tweeter is therefore especially suitable