Originally Posted by shamus
This is interesting....
Denons new receiver that incorporates IIz and DSX has no apparent hardware changes (at least not on the outside).
A quick read of the manual allows either back, height or wide and no combination of the three. You use the surround back channel speaker connection and make your choice of the three somewhere in the menu.
Maybe its not so impossible for a firmware to add these new features?
Looks like the only hardware change would be to the front panel to put the Audyssey Dynamic Surround Expansion Logo on the LED display.
After doing quite a bit of research, I have a feeling that ProLogic IIz is not going to be offered as an upgrade option for the 5308CI, mostly due to the fact that it'd require a ton of changes in the set up menu to support Audyssey calibrating the system properly. This is based on reading the manual for the 4310CI from cover to cover. Also it appears that the height channel would go in the Surround Back / Amp Assign, so I assume you could have height speakers or multiple zone, but not both and frankly I run my zone 2 all the time when I listen to music outside, so this wouldn't work for me at all.
Assuming Denon doesn't offer an upgrade option for Pro Logic IIz, I won't be too mad (even though I bought my 5308CI just two months ago), from everything I've read, it doesn't add much to the sound stage and it's costly given that you have to buy 2 additional speakers.