An affordable AV receiver is always a good option to consider, so Yamaha RX-V385 vs Onkyo TX-8140 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Yamaha RX-V385 has 5.1 versus 2.0 for Onkyo TX-8140. Regarding power, then RX-V385 has such a W/Ohm ratio - 70/6 when TX-8140 has a power of 80/8, 110/6. The THD is 0.09% for the RX-V385 but 0.08% for the TX-8140.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 384 KHz/32-bit for RX-V385 and AK4458 384 KHz/32-bit for the TX-8140. None of the models support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Onkyo TX-8140 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the TX-8140 supports Spotify. Only the RX-V385 provides HDMI signal transmission in standby mode. The RX-V385 can scale the input HDMI signal, unlike the TX-8140. Dolby Vision technology found support only on the RX-V385. Only the RX-V385 supports HDMI Audio Return Channel (ARC). The HDMI eARC is available only on the RX-V385. Of the two receivers in our comparison, HDMI CEC is present in only the RX-V385. The TX-8140 has a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is only available for the RX-V385. The setup assistant will help you configure Onkyo TX-8140.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.