Only 818 and 929 that I can tell after looking around; looked at some of the 3xxx series....but don't find one, thought one of those could do it, too.
I just pulled up the manual for the 818. Zone 2 is used if bi-amping is desired.
Important: • When making the bi-amping connections, be sure to remove the jumper bars that link the speakers’ tweeter (high) and woofer (low) terminals. • Bi-amping can be used only with speakers that support biamping. Refer to your speaker manual.
Also read the setup section on p 59:
`Digital Crossover: Select this if you’re using speakers without crossover network.
And on p 63 it gives you all the possible crossover frequencies
■ Crossover `“250Hz”, “320Hz”, “400Hz”, “500Hz, “630Hz”, “800Hz”, “1000Hz”, “1250Hz”, “1600Hz”, “2000Hz”, “2500Hz”, “3200Hz”, “4000Hz”, “5000Hz
Hope one is suitable.
From what I gather you can use this active bi-amp with only a 2 way system without built in crossovers or one could rewire the speaker to bypass the built in passive crossover.
No 3 or more way speakers or just plain bi-amp.
But indeed it can be an active bi-amp setup for 2 way speakers.
Interesting.
My 939 is olden days and speakers are at least 3 way or 4 way up front.