I think there was a thread about a year ago from someone who was having trouble driving the 20.1's with the Cary 500's. If I recall correctly, it was pointed out that the 20.1's had a pretty significant impedance dip to about 2 ohms that you don't have with the 3.6's.
I'd not want to speculate on the 20.7's. The crossovers are different. I'd want to see the impedance curve.
I'd not want to speculate on the 20.7's. The crossovers are different. I'd want to see the impedance curve.