I've got a cheapo 1x12 i've cobbled together from an old ported box and a car sub. Sounds killer (honestly), so much so the 8x10's been sitting idle in the garage for a while now! I'd like to add a tweeter to enhance it's range. I've got a couple of spare Motorola piezo units that I can use, and I don't need absolute clarity in the crossover. How do I correctly wire this in? Is it in parallel with the 12", the +ve side going through a capacitor to cut lows or something? How can I determine what value components to use to get a good crossover point (around 3K)? Also, will adding the tweeter to an already 4ohm cabinet cause any issues with impedence - amp or output of the 12"? thanks!