Maggie 1.7s are more amp-friendly than you might think. I power mine with a 100wpc early '80s Perreaux PMF 1150B, which is rated 100wpc into 8 ohms, and probably makes close to 200 into the 1.7's 4-ohm load. The Sphinx isn't too far behind that at 100/155 into 8/4 ohms.
BUT, instead of occupying a 12.5x12.4 room, mine are in a 16x22 living room with 15' vaulted ceiling, and the back half of the room is open to the rest of the open architecture living space. Granted, I have a couple of *tiny* 8" subs, but they only fill in about 36-45 Hz and aren't turned up very far.
Anyway, 100wpc into 1.7s should be plenty for a 12.5x12.4 room.
Silverline Prelude Pluses should also be a good fit, and present one of the tiniest footprints.
BUT, instead of occupying a 12.5x12.4 room, mine are in a 16x22 living room with 15' vaulted ceiling, and the back half of the room is open to the rest of the open architecture living space. Granted, I have a couple of *tiny* 8" subs, but they only fill in about 36-45 Hz and aren't turned up very far.
Anyway, 100wpc into 1.7s should be plenty for a 12.5x12.4 room.
Silverline Prelude Pluses should also be a good fit, and present one of the tiniest footprints.