it's kinda weird, I don't know if this is more prevelent with Yamaha, but if you check my RXV-1400 amp. web-stes etc. It shows that it does NOT have dolby pro logic llx, but mine and later models do, I undersatand that Yamaha will "upgrade" the earlier models that did not at no charge at a factory authorized dealer. Seems like timing and all these changes (technology) occur quicker than they make/market these things, I am just happy as hell to still have power!! right now.

Sunfire amps & processor Sammy 50" Crown amp 2-SVS SS Maple Ultras, Axiom 60s,22s,150cc, QS8s