Can you upgrade the decoders in older AVRs? Exteriors? in Home Theater Posted December 26, 2020 Great info (AV-3805) owner..with the new Samsung, only optical, no HDMI and unfortunately the optical input in this unit does not send info to Zone 2 or 3. Sounds like an upgrade to Living room, and move the 3805 to the Garage (Double upgrade) as the Denon in the garage is older yet no Sub pre out. now what to get, Denon, Marantz, Yamaha, Imotiva, maybe Onkyo but but my Onkyo before the Denon only lasted 2 years. It may have been over loaded with zone 2 not having a separate Amp, and inexperience at the time. So decisions, decisions... But great info here!