The Onkyo TX-NR555 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 - 7.2 versus 2.0, respectively, for devices. In terms of power, there are differences, the TX-NR555 has such a ratio W/Ohm - 130/6, while the RX-4508 has a power of 100/8. The value of total harmonic distortion is also different, and for the TX-NR555 it is 0.08%, but for the RX-4508 it is 0.09%. The Bi-amping function is implemented only in the Onkyo TX-NR555. The model TX-NR555 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The TX-NR555 has access to the Spotify service.
Support for the HDR function can only boast of the TX-NR555. HDMI signal transmission in standby mode can provide only the TX-NR555. None of the devices can increase the resolution of the incoming video signal. Review participants do not have the Dolby Vision feature. HDMI Audio Return Channel is only available on Onkyo TX-NR555. HDMI eARC is not supported by the TX-NR555 and the RX-4508. When comparing receivers, it becomes clear that only the Onkyo TX-NR555 has HDMI CEC. Like most receivers, our models have a built-in phono stage for connecting a vinyl player. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in TX-NR555. None of these units can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the TX-NR555. Only in the TX-NR555 realized a DTS:X surround technology.