Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
As you've noted, the 755 is a five-channel amp, leaving you with no surround back channels. You would need a 7.1 system to have any use for Pro Logic IIx since the only difference between IIx and Pro Logic II is that IIx can generate stereo surround back channels. The 950's Cirrus Extra Surround can create a mono surround back channel and send it to one or two surround back speakers (if available).