I've owned the 1.6's and the more juice I gave them the better they sang, no question. They would not play loudly, whichout nasty clipping on almost any tube amp I threw at them. SS and highpowered. If you go the ARC or
Bigger Rogue tube amps that's prob fine. But McIntosh and Cary really counldn't drive them. I think 300w into 4ohm is the min you can start with. Innersound ESL amp was the best I ever heard with the 1.6qr's. I took that amp to the 3.6r's when I moved up without a hitch at all.