Onkyo adds 7.1 THX-Select processing and Net-Tune (which can stream digital audio through the receiver from your computer). Yamaha is not THX certified and offers 6.1-channel surround processing.

At $1,199, the Onkyo TX-RZ30 9.2 Channel A/V Receiver includes Dirac Live, Dolby Atmos, THX Certification, IMAX Enhanced, and more. With the increased popularity of soundbars and streaming amplifiers, ...