Yes - the Lamm Ref 1.2 works quite nicely with the Sasha.
With its switch set for lower impedances the amp delivers 220 Watts into 2 Ohms and 400 Watts into 1 Ohm. On the higher impedance setting (which you probably would not choose for the Sasha, although you can) the M1.2 Ref yields 220 Watts into 4 Ohms, 400 Watts into 2 and 600 Watts into 1 Ohm. That’s all per the specs. Mr. Lamm acknowledges the M1.2 Ref is capable of delivering 770 Watts of power into a 1 Ohm load and he’ll tell you that not only can you use the amp as an arc welder, it will drive any speaker on the market.