Ehider, I hope you proceed with your project; using one of the tweeters from the Vifa D27TG line. I have personally found that they mesh extremely well with Seas midbass drivers. You could choose from either the P17(6.5") or P21(8") line(polypropylene with or without phase plug). The magnesium versions of these drivers w/copper phase plugs are used on some of THE finest speakers around(Hales, Coincident, etc.). The smaller one may be preferable if you're building a 3 way design, or will be using a strong subwoofer. You could also use a Morel driver. Morel 6" would be MW162, MW164, or MW166, 8" would be MW265 or MW266. Both companies may now have different versions(and part numbers) of these drivers. Pardon me as I am using 5 year old literature(last time I built anything with these parts - sorry). A simple first order crossover will sound very nice with this combination. Use a polypropylene and tin foil Rel or MIT cap on the tweeter leg. You may also want to bypass this with a polystyrene or teflon and copper foil cap(yields an excellent improvement for the money). For the woofer, I recommend a 12 gauge coil from North Creek or Alpha Core Goertz. The North Creek offers a more relaxed, liquid tone, Goertz is a bit more analytical sounding to me. Try this combination out. If the tweeter needs attenuation(depends on the midbass driver you mate with it), use a 1 - 3 ohm, 10 watt silicone coated wire wound resistor from Ohmite(or equivalent). Please do not use any other type of resistor, as these are the only ones I have come across that will not add the harshness, grunge, and distortion most people will expect from this tweeter. Buy the resistors from Mouser Electronics, as their prices are roughly a third($1.75 - $3) of the what the speaker suppliers will charge you. I presume you are going to be using solid state electronics. If that is the case, go with copper wire internally. If you know you will be using tubes, you may want to consider silver. Both Orca Design(20 ga.) and Home Grown Audio(22 ga.) sell excellent copper wire, the HomeGrown having teflon insulation(better). I recommend braiding enough wire to achieve 17 gauge to the tweeter, and 12 gauge to the woofer. Using the aforementioned parts, you will be able to build speakers for $125 - $200 that a manufacturer would sell for more money than you would care to believe. And you will not have to worry about power handling. Good Luck with your project!
