Look at the eight π loudspeaker:eight π loudspeaker
You might also consider the two π or two π tower with soft-dome tweeter. The piezo tweeter has been discontinued, so we are now offering this one. Stock of the original kits are dwindling, and when they run out, new kits will contain this tweeter and price will be increased $20.00. The tweeter circuit contains a 10uF capacitor in series and a 16 ohm resistor across the tweeter. The woofer circuit remains the same. Baffle cutout for the tweeter is slightly larger, so existing speakers can be easily retrofitted.