Onkyo TX-RZ820 vs Onkyo TX-8140 review

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An affordable AV receiver is always a good option to consider, so Onkyo TX-RZ820 vs Onkyo TX-8140 comparison definitely makes sense.

Amplifier

A significant difference between the receivers in the number of channels, Onkyo TX-RZ820 has 7.2 versus 2.0 for Onkyo TX-8140. Regarding power, then TX-RZ820 has such a W/Ohm ratio - 160/8 when TX-8140 has a power of 80/8, 110/6. The THD is the same and is 0.08%.

Audio features

Competitors' digital to analog converter (DAC) is identical to AK4458 384 KHz/32-bit. Only the TX-RZ820 supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. Spotify can be used on each receiver. The TX-RZ820 can work with the audio stream from Deezer, TIDAL, and the TX-8140 can receive a content from SiriusXM. Only the TX-RZ820 provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the TX-RZ820. Only the TX-RZ820 supports HDMI Audio Return Channel (ARC). Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the TX-RZ820. These compared receivers have a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is only available for the TX-RZ820. Both TX-RZ820 and TX-8140 can be configured using the Setup assistant.

Multichannel surround

Only the TX-RZ820 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-RZ820.