Pro Logic II vs. Pro Logic IIx

[john4618]

<font color='#000000'>What is the major difference between Pro Logic IIx and Pro Logic II

I have an RX-V2400 that does not have Pro Logic IIx but I've read that Yamaha can add it if I ship them the unit ?</font>

 

[Audioholics]

<font color='#000080'>Adds Dolby PLII 7.1 support. If you do not have 7.1, don't worry about it.</font>

 

[Guest]

<font color='#000000'>According to Dolby's website, Prologic IIx converts to 6.1 and 7.1 (up from 5.1). &nbsp;So is Prologic IIx necessary for a 6.1 setup? &nbsp;(Does Prologic II only apply to 5.1?)</font>