It’s strongly recommended to compare different receivers if you want to choose the best one: Denon AVR-S640H vs Pioneer VSX-832.
The number of channels for receivers is different - 5.2 versus 5.1, respectively, for devices. In terms of power, there are differences, the AVR-S640H has such a ratio W/Ohm - 75/8, 100/6, while the VSX-832 has a power of 80/8, 165/6. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the AVR-S640H received the model 192 KHz/32-bit, but the VSX-832 is equipped with AK4438 384 KHz/32-bit. None of the compared opponents supports Bi-amping. Both Denon AVR-S640H and Pioneer VSX-832 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet access via WIFI is possible on both units. Each of the receivers has a Bluetooth connector. The contenders have differences in the supported services from Apple - AirPlay, AirPlay 2 versus AirPlay respectively. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Denon AVR-S640H works with Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, but the Pioneer VSX-832 works with Deezer, TIDAL, Pandora, 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 AVR-S640H and the VSX-832. Video scaling is only possible with the VSX-832. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the AVR-S640H has 5/1, and the VSX-832 has 4/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the AVR-S640H and the VSX-832. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AVR-S640H and VSX-832 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Denon AVR-S640H. There is an ECO mode in AVR-S640H. The Denon AVR-S640H and the Pioneer VSX-832 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the VSX-832. Only in the VSX-832 realized a DTS:X surround technology.