tweeters

I've been pondering piezo speakers, and wondering what their main limitations are. How good could one be made if a lot of effort was put in to it? Why do those piezo transducers always have to be disc shaped? I see there are piezo strip actuators. Could a piezo speaker be a thin strip, like a...

Hi on of my amp has a treble control (15 kHz) , and since i use several speakers (and different amp) , i don't like to increase/decreae the treble control everytime I want to play my amp for example everytime i change bookshelf speakers or floorstanding speakers , even it's enough a slightly...