An affordable AV receiver is always a good option to consider, so Yamaha R-N303BL vs Onkyo TX-8140 comparison definitely makes sense.
Considered AV receivers have the same number of channels 2.0. Regarding power, then R-N303BL has such a W/Ohm ratio - 125/8 when TX-8140 has a power of 80/8, 110/6. The THD is 0.09% for the R-N303BL but 0.08% for the TX-8140.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 192 KHz/24-bit for R-N303BL 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. None of the competitors supports Auto speaker calibration.
Both models have the ability to connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Spotify can be used on each receiver. The R-N303BL can work with the audio stream from Deezer, TIDAL, Pandora, Sirius XM, Napster, Qobuz, JUKE, and the TX-8140 can receive a content from SiriusXM.
HDR is not available on each model. Compared AV receivers are not able to transmit a 4K signal from the source to the TV or projector. HDMI signal transmission in standby mode is not supported by each device. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers. The HDMI Audio Return Channel (ARC) does not support any one of these models. Unfortunately, HDMI eARC is not available on monitored devices. The models in our review do not support the HDMI CEC function. 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 R-N303BL. 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.