Having had an opportunity to test Denon AVR-X3600H vs Denon AVR-X2500H, I’d like to share my impression here to facilitate your choice of a new AV receiver.
The number of channels for receivers is different - 9.2 versus 7.2, respectively, for devices. In terms of power, there are differences, the AVR-X3600H has such a ratio W/Ohm - 105/8, 135/6, while the AVR-X2500H has a power of 95/8, 125/6. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the AVR-X3600H received the model 192 KHz/32-bit, but the AVR-X2500H is equipped with AK4490 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Denon AVR-X3600H and Denon AVR-X2500H 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. Both devices can work with such Apple Music services: AirPlay, AirPlay 2. Access to the Spotify service is on each of the competitors. Most popular streaming services are available for our models under consideration - Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud.
The HDR10 function is present in each of the rivals. 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-X3600H and the AVR-X2500H. Video scaling is only possible with the AVR-X3600H. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the AVR-X3600H has 8/3, and the AVR-X2500H has 8/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the AVR-X3600H. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. The AVR-X3600H has support for the standard HDCP 2.3, compared to the AVR-X2500H, which supports the standard HDCP 2.2. Like most receivers, our models have a built-in phono stage for connecting a vinyl player.
Ability to create 2 Multi zones inherent in both AV receivers. Voice control is performed using Amazon Alexa, Google Assistant, Siri, Josh.AI in both models. There is an ECO mode in either AV receiver. The Denon AVR-X3600H and the Denon AVR-X2500H can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. A DTS:X surround technology is supported by devices from our comparison.