Sir most generic receivers like konzert, sakura, etc. are just a 5.1 not equally integrated power amp. and the said prologic face plate logo are just there sadly
to sell.
If your really want a proglogic receiver at a cheap price, go for the B & S section, there are some second hand receivers that really decodes prologic like my DSP-2000 im selling it for 6T neg. with remote.
prologic should convert 2 analog audio signal into L/C/R dedicted channel and making the 2 surrounds channel as a mono source. and for that i tried if these generic "prologic" receivers if they do decode this signal.
the outcome... sadly they don't decode, vocal's tend to mixed-up with the L/C/R and the surrounds also tends to produce vocal sources that makes this receivers as 5ch integrated power amp.
Now the good side, new modeled generic receivers such as KonZert 600R has a 5.1 input so that making your DVD players as a dolby digital decoder. (but as a last note there are no fiber optic connections on any generic receivers)