I have a pair of Innersound Kayas that also have 1ohm dips. I started out with 2EAR 890's in bridge mode, but they couldn't handle the Kayas. Extremely rolled off In the highs. Then I started with high power solid state, but quickly learned that I am a tube guy. I managed to purchase a tube amp that was originally designed to be sold as the Innersound itube. 150 watts, and 100 lbs. of transformers. It controls the electrostatic panels perfectly. Uses 8 KT 88's. There is a review of it on 6 moons. After Innersound folded, the designer, Terri Tekisham, continued to market it under the brand Western Reserve.
Other tube amps that work with stats are the Cat's,and the Berning OTL,s are incredible.
Other tube amps that work with stats are the Cat's,and the Berning OTL,s are incredible.