| Re: BFD-like device for mains and surrounds? Not sure about other amps compared to my Denon, but if you use the DEQ2496 to EQ the front speakers there are a couple of options to achieve this and neither of them are ideal.
(1) Take the Front L+R pre-outs and feed the DEQ for processing. Then you would feed them back into the analogue L+R channels of an unused analogue source and then use power amp assignment to drive the front speakers through the surround B speaker terminals. Zones 2 and 3 on the Denon will only accept analogue signals. So I'd lose my 7.1 amp capability in favor of a 5.1 plus power amps for the EQing.
(2) Take all the pre-outs and loop all back into the EXT-IN sockets with the L+R going via the DEQ and the sub to the sub of course. The DEQ would then sit in the middle of of the L+R "loop". However, EXT-IN bypasses all digital processing, including crossovers and bass management.
Bob | Sony KL-50W2 | Denon 3805 + POA-T10 Biamp| Denon 2900 | Pioneer 575-S | B&Ws 604s3/602s3/LCR600s3 in 7.1 | SVS PB12-ISD | BFD | Pinnacle Showcenter |Sky+(250GB) | Cables Scorpion & Mark Grant| Bob - "Malice" was my Quake 2 CTF name |