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I'm designing a three way cross-over system for a pair of disco speakers, and i'm planning to use Series Notch and Zobel impedence correction circuits. However, I can't find the relevant Thiele-Small Parameters (Qms, Qes and Le for definite and i think i may need Qts) for a Motorola Piezo Horn Tweeter. I want to find these params before I buy the loudspeaker components so i can design a cross-over network and get it working before i spend a load on drivers and tweeters. Any help appreciated...
Follow Ups:
Because a piezo is essentially a capacitor, it doesn't behave electrically the same as an electrodynamic loudspeaker. If you want to cross over to a piezo with a conventional crossover network, put a 10ish ohm power resistor in parallel with the piezo. This way the crossover will "see" an essentially resistive load like it expects. There was a lot of detailed discussion on the Pi forum about this.
Hello,there was a lot of discussions on piezos and xover,
try searching in Pi Speaker Forum for the start.http://www.audioasylum.com/scripts/search.pl?searchtext=Piezo&forum=pi
O'Tor
As I understand piezos, you don't need T/S parameters for the crossover design since they are essentially resistive. Just put a 15-20 ohm resistor across the speaker's input terminals and go from there.
Thanx R. Hertz! I've never used piezos before so u just potentially saved me a lot of time and wasted effort!
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