So the newer sl line sounds like a vento from 10 years ago so. That makes sense with them using older parts. Also he was convinced and supposedly done the swap with trim rings before. So we’ll see if it works.\nDid you get photos of drivers part numbers? Voice coil? Magnet? Spider? Vent?\nI seriously doubt drivers are way different but definitely not the same.\n\nAs is usually the case, the drivers are only numbered as an assembly, not piecemeal for the parts. I have numbers but will not verify them until tomorrow. However, I know the woofer is different, because, as I said, the 820.2 predates the titanium woofer. But not having to modify the crossover indicates that they have the same characteristics.