It’s strongly recommended to compare different receivers if you want to choose the best one: Marantz NR1509 vs Pioneer VSX-531.
The number of channels for receivers is different - 5.2 versus 5.1, respectively, for devices. In terms of power, there are differences, the NR1509 has such a ratio W/Ohm - 50/8, 60/6, while the VSX-531 has a power of 80/8, 140/6. A common feature for devices is the same total harmonic distortion - 0.08%.
Competitive models use the same DAC. None of the compared opponents supports Bi-amping. Both Marantz NR1509 and Pioneer VSX-531 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The NR1509 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 NR1509 and the VSX-531. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the NR1509.
The number of HDMI inputs/outputs varies depending on the receiver, the NR1509 has 7/1, and the VSX-531 has 4/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the NR1509 and the VSX-531. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. NR1509 and VSX-531 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Marantz NR1509. There is an ECO mode in either AV receiver. The Marantz NR1509 can be properly configured using the setup assistant.
Generally no support for a Dolby Atmos multichannel audio format. A DTS:X surround technology is not supported by devices from our comparison.