Having had an opportunity to test Pioneer VSX-1131 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-1131 has such a ratio W/Ohm - 100/8, 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-1131 received the model AK4458 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-1131 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-1131 works with Deezer, TIDAL, Pandora, TuneIn Radio, but the Onkyo TX-NR545 works with Tunein Radio.
Support for the HDR function can only boast of each of the AV receivers. 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-1131 and the TX-NR545. Video scaling is only possible with the VSX-1131. Operation with the Dolby Vision is only possible with the VSX-1131.
The number of HDMI inputs/outputs varies depending on the receiver, the VSX-1131 has 7/2, and the TX-NR545 has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the VSX-1131 and the TX-NR545. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. VSX-1131 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-1131.
Ability to create 2 Multi zones inherent in both AV receivers. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in neither AV receiver. The Pioneer VSX-1131 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-1131 realized a DTS:X surround technology.