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, ...

THX certifies that an audio system follows strict rules for ultra-high-quality digital sound playback. These systems can be professional theater or cinema sound systems, surround ...