I use Alpeph 1.2's with Duetta Signatures, and it's a match made in heaven. The Calipers are a bit tougher load than the Duettas. The Calipers are nominal 3 ohms vs the Duetta nominal 4 ohm. The 1.2's are still good for about 250 watts at this impedance, so they should work fine.
They are pretty heavy and run hot, though (think space heater).
They are pretty heavy and run hot, though (think space heater).