2. Cross them aboe 3500 Hz for no loss in omaging that you will be able to hear.

3. No they will not consume much power. How much power do you think it takes to drive a small dome like that? ALmost none!

4. THe crossovers you use may consume some power. If you go with a simle 6db/octave low & high filter, and get the crossover points right, my guess is you will have a much better sounding system.
-akhilesh

I use FE206E's with a T90A on top, padded down somewhat, and rolling off first order below 15 kHz (still contributing significantly an ocatave or so below that point). I don't use a high pass filter on my FE206E, but I do some response shaping down in the lower treble region. The FT17H is also a very nice unit at a much lower price, and if you're going to cross over that high it's probably just about as good.

Duke

2. I don;t thin kthe impedancewill matter a whole lot. All else being equal, go with 8 ohms.

3. You can measure your 206 rolloff and then put in an appropriate high pass only xover, with the requisite slope. IF the slope is > 6 db, it may complicate things in terms of phase.
But, at the frequencies you are talking about, it won;t matter. Jst put a 1.5 MuF cap in series with the 8 ohm tweeter to begin with.
-akhilesh

I ask because my gut feeling is that if the overall system sensitivity is 93-95dB then I think the DX25 would be better. If it's 96-98dB then the MG27 would probably be better. It wouldn't be cost prohibitive to try them both and see. As far as cap value, that depends on what frequency you want to crossover. The DX25 allows a fairly low crossover point, so you can take advantage of that if you like.