I ask because the 1.7 is in a 1.6 enclosure. The chief differences are an additional bucking magnet on the tweeter, and the star-plane woofer. I hope to find a 1.7 to dissect, listen to and measure.
What is on my radar is to recreate Jim's CS1.7, which exists in prototype form. New Thiel modified the crossovers somewhat away from Jim's intent and I wonder what a Jim Thiel 1.7 would sound like. Gary Dayton says Jim's was better to his ear.
There's always something.
Tom