Having had an opportunity to test Pioneer VSX-1131 vs Onkyo TX-SR373, I’d like to share my impression here to facilitate your choice of a new AV receiver.
The number of channels for receivers is different - 7.2 versus 5.1, respectively, for devices. In terms of power, there are differences, the VSX-1131 has such a ratio W/Ohm - 100/8, 170/6, while the TX-SR373 has a power of 135/6. The value of total harmonic distortion is also different, and for the VSX-1131 it is 0.08%, but for the TX-SR373 it is 0.06%.
The manufacturer installed different DACs, the VSX-1131 received the model AK4458 384 KHz/32-bit, but the TX-SR373 is equipped with 192 KHz/24-bit. The Bi-amping function is implemented only in the Pioneer VSX-1131. The model VSX-1131 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The VSX-1131 has access to the Spotify service.
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-SR373. 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-SR373 has 4/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the VSX-1131 and the TX-SR373. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. VSX-1131 and TX-SR373 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. 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 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the VSX-1131. Only in the VSX-1131 realized a DTS:X surround technology.
The Pioneer VSX-1131 is better receiver in this comparison. Check Pioneer VSX-1131 price