The Denon AVR-S640H vs Sherwood RX-4508 comparison will be extremely helpful for people who want to get a great, powerful receiver with many functions.
The number of channels for receivers is different - 5.2 versus 2.0, 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 RX-4508 has a power of 100/8. The value of total harmonic distortion is also different, and for the AVR-S640H it is 0.08%, but for the RX-4508 it is 0.09%. None of the compared opponents supports Bi-amping. The model AVR-S640H can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet connection via WIFI is only possible with AVR-S640H. Each of the receivers has a Bluetooth connector. The AVR-S640H has access to the Spotify service.
Support for the HDR function can only boast of the AVR-S640H. HDMI signal transmission in standby mode can provide only the AVR-S640H. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the AVR-S640H. HDMI Audio Return Channel is only available on Denon AVR-S640H. HDMI eARC is not supported by the AVR-S640H and the RX-4508. When comparing receivers, it becomes clear that only the Denon AVR-S640H has HDMI CEC. Like most receivers, our models have a built-in phono stage for connecting a vinyl player. There is an ECO mode in AVR-S640H. The Denon AVR-S640H 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.