Sorry to disagree with Mijostyn, but there are way better ways of doing this and using the MRX Receiver with a higher quality power amplifier.
The idea of the receiver to power the center and rears is a good one, the area where we would differ, is to use a high quality intergrated amplifier with a home theater bypass function, along with a high quality dac/streamer.
The reason is simple any surround sound processor does a poor job as a two channel preamplifier/dac. The reason is simple economics, a surround receiver has 5-11 channels of preaplification, 5-11 channels of dacs, Dolby and DTS decoders along with a video switcher, way too much circuity that generates noise is being injected into the music signal.
For this reason a pure two channel integrated will often sound far more dimensional with better resolution than the surround sound receiver even with a good power amplfier. The Parasound A21+ is a good power amplifier and even with the excellent Anthem Receivers, for music a Coda, Hegel, Luxman, Naim, Unison Reseach integrated will offer a far more realistic recreation of a music event than the other setup.
Dave and Troy
Audio Doctor NJ Dealers for Anthem, Parasound, Coda, Unison, Naim,