The Denon AVR-X540BT vs Denon AVR-X4100W comparison proves that these receivers have many common features.
A significant difference between the receivers in the number of channels, Denon AVR-X540BT has 5.2 versus 7.2 for Denon AVR-X4100W. Regarding power, then AVR-X540BT has such a W/Ohm ratio - 70/8, 90/6 when AVR-X4100W has a power of 125/8, 165/6. The THD is 0.08% for the AVR-X540BT but 0.05% for the AVR-X4100W.
Competitors' digital to analog converter (DAC) is identical to 192 KHz/24-bit. Only the AVR-X4100W supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Denon AVR-X4100W can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Spotify can be used on each receiver. The AVR-X540BT can work with the audio stream from TIDAL, Pandora, and the AVR-X4100W can receive a content from Pandora, SiriusXM.
Only the Denon AVR-X540BT has support for High dynamic range (HDR). Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. The AVR-X4100W can scale the input HDMI signal, unlike the AVR-X540BT. The HDR standard - Dolby Vision is supported by these receivers.
The Denon AVR-X540BT has 5/1 HDMI inputs/outputs versus 8/3 HDMI connectors of the Denon AVR-X4100W. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-X4100W has a built-in phono stage for connecting a vinyl player. A voice control is not available. It is also worth noting that the ECO mode is presented in each of the receivers. Both AVR-X540BT and AVR-X4100W can be configured using the Setup assistant.
Only the AVR-X4100W has a Dolby Atmos multichannel audio format support. The receivers do not support the surround sound technology DTS:X.