Denon AVR-X8500HSP vs Onkyo TX-RZ3100: which would you get for the best home entertainment experience? The AVR-X8500HSP has 13.2 channels amplifier and the TX-RZ3100 11.2 channels. Both receivers have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices. We have evaluated both AV receivers, AVR-X8500HSP has an overall score of 9.6 out of 10 vs 8.2 out of 10 for TX-RZ3100.