The Faital Pro Italian made speakers are incredibly good and reach high frequencies *without* the typical horn harshness (let alone Piezo harshness) because besides being incredibly well made, they use very light aluminum wire voice coils, while equivalent Eminence use heavier copper wound.
1) unless you find a closed ("blind") basket one, youīll need to close its back if mounted in the same cabinet as the woofer (no problem if you mount 1 or more in a separate enclosure) so bass pressure does not push/suck the poor little cone all over the place.
You may kludge a small wooden box out of some plywood or even glue a stiff cardboard tube from the inside, covering its end with a round (or square, nobody will see it anyway) piece of plywood.
Drill a small hole to let wires through and seal it with hot glue or similar so mini speaker chamber is separated from the main one.
2) you will need a highpass crossover so only high mids and highs reach the mid/tweeter.
Not endorsing anybody, but US Speaker has both, browse their catalog:
Faital Pro 3FE25 3" Speakers - Faital Pro 3FE25 mid-high speaker. The Faital Pro 3FE25 has a wide frequency range from 100Hz to 20kHz and has a ferrite magnet. Faital Pro 3FE25 40 watt 3" has an efficiency of 91dB SPL for all high quality mid-high ap
Faital Pro 4FE35 4" Speakers - Faital Pro 4FE35 mid-high speaker. The Faital Pro 4FE35 has a wide frequency range from 90Hz to 20kHz and has a ferrite magnet - Faital Pro 4FE35 60 watt 3" has an efficiency of 91dB SPL for all high quality mid-high ap
Small World indeed.
I love ultra defined Bass , but hate Piezo harshness, so , since I make my own speakers, just cooked a batch of 100 4" mid/high speakers, very much with the Faital formula ... only I used straight paper edges (no need for lower frequencies) and closed back frames, for ease of mounting:
oh, the dustcap is still unattached; I always let speakers "rest" a couple days until adhesives really set.
After stamping/pressing/turning the 100 speakers (minimum batch because itīs all "metallurgical" work, not "electronic") I almost fainted when my cone supplier told me " 4" tweeter cones? NOBODY uses them any more so we have none left . You want us to import a few for you? No problem, 5000 units is the minimum order, paid for in advance"
I asked them to check their records for the last customer who bought them, they luckily found a guy still stocking 1000 or 2000 of them (in cheesy white colour only) , unused gathering dust on a shelf, so he saved my life.