Onkyo TX-NR787 vs TX-NR686 vs TX-NR585 Review (TX-NR686 vs TX-NR676; TX-NR585 vs TX-NR575)

While the Onkyo TX-NR686 and TX-NR787 have the same power output of 100 Watts per channel (2-channel driven into 8 ohm loads, 20Hz-20kHz, 0.08% THD), the number of amplification channels is different:

Onkyo TX-RZ630 vs TX-NR787 vs TX-NR777 Review

Since the Onkyo TX-NR787 and TX-NR777 are not part of the RZ-series (like the TX-RZ630 is),

Onkyo TX-RZ730 vs TX-RZ630 vs TX-RZ620 Review

The Onkyo TX-RZ730 is THX Certified whereas the Onkyo TX-RZ630 and TX-RZ620 don't have this certification.

Onkyo TX-RZ830 vs TX-RZ730 vs TX-RZ720 Review

The output power is different on the Onkyo TX-RZ830 vs TX-RZ730 vs TX-RZ720.

Onkyo TX-RZ920 vs TX-RZ830 vs TX-RZ820 Review

The Onkyo TX-RZ920's power output is not directly comparable to either TX-RZ830 or TX-RZ820 because it's measured at 1kHz rather than from 20Hz to 20kHz like on the TX-RZ830 or TX-RZ820.