Both DPLIIx and the seven channel HK receivers with Logic7 will extract different "stereo" surround material for two back speakers. DPLIIx can do it with a 5.1(or4.0)source as well as two channel, while the HK variety of Logic7(there are more advanced versions by Lexicon)operates only on two channel.

-----------------------------------

Enjoy the music, not the equipment.