It’s strongly recommended to compare different receivers if you want to choose the best one: Denon AVR-S540BT vs Denon AVR-X1500H.
The number of channels for receivers is different - 5.2 versus 7.2, respectively, for devices. In terms of power, there are differences, the AVR-S540BT has such a ratio W/Ohm - 70/8, 90/6, while the AVR-X1500H has a power of 80/8, 120/6. A common feature for devices is the same total harmonic distortion - 0.08%.
Competitive models use the same DAC. The Bi-amping function is implemented only in the Denon AVR-X1500H. The model AVR-X1500H can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet connection via WIFI is only possible with AVR-X1500H. Each of the receivers has a Bluetooth connector. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Denon AVR-S540BT works with TIDAL, Pandora, but the Denon AVR-X1500H works with Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud. 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-S540BT and the AVR-X1500H. None of the devices can increase the resolution of the incoming video signal. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the AVR-S540BT has 5/1, and the AVR-X1500H has 6/1. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the AVR-S540BT and the AVR-X1500H. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AVR-S540BT and AVR-X1500H support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Denon AVR-X1500H. There is an ECO mode in either AV receiver. The Denon AVR-S540BT and the Denon AVR-X1500H can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the AVR-X1500H. Only in the AVR-X1500H realized a DTS:X surround technology.