Having had an opportunity to test Pioneer VSX-LX102 vs Onkyo TX-NR545, I’d like to share my impression here to facilitate your choice of a new AV receiver.
AV receivers under review have the same number of channels. In terms of power, there are differences, the VSX-LX102 has such a ratio W/Ohm - 80/8, 170/6, while the TX-NR545 has a power of 100/6. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the VSX-LX102 received the model AK4438 384 KHz/32-bit, but the TX-NR545 is equipped with Hi-Grade 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Pioneer VSX-LX102 and Onkyo TX-NR545 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
These units have the same Wi-Fi modules. Each of the receivers has a Bluetooth connector. Both devices can work with such Apple Music services: AirPlay. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Pioneer VSX-LX102 works with Deezer, TIDAL, Pandora, TuneIn Radio, but the Onkyo TX-NR545 works with Tunein Radio. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the VSX-LX102 and the TX-NR545. Video scaling is only possible with the VSX-LX102. Operation with the Dolby Vision is only possible with the VSX-LX102.
The number of HDMI inputs/outputs varies depending on the receiver, the VSX-LX102 has 4/1, and the TX-NR545 has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the VSX-LX102 and the TX-NR545. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. VSX-LX102 and TX-NR545 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Pioneer VSX-LX102. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in VSX-LX102. The Pioneer VSX-LX102 and the Onkyo TX-NR545 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. Only in the VSX-LX102 realized a DTS:X surround technology.