Having had an opportunity to test Denon AVR-X4500H vs Yamaha AVENTAGE RX-A1080, 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-X4500H has such a ratio W/Ohm - 125/8, 165/6, while the AVENTAGE RX-A1080 has a power of 110/8, 170/4. The value of total harmonic distortion is also different, and for the AVR-X4500H it is 0.05%, but for the AVENTAGE RX-A1080 it is 0.06%.
The manufacturer installed different DACs, the AVR-X4500H received the model AK4458 384 KHz/32-bit, but the AVENTAGE RX-A1080 is equipped with ESS SABRE 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Denon AVR-X4500H and Yamaha AVENTAGE RX-A1080 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. 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. The number of available streaming services varies for receivers, the Denon AVR-X4500H works with Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, but the Yamaha AVENTAGE RX-A1080 works with Deezer, TIDAL, Pandora, Sirius XM, Napster, Qobuz.
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-X4500H and the AVENTAGE RX-A1080. Each 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 is the same - 8/3. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is supported by the AVR-X4500H and the AVENTAGE RX-A1080. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AVR-X4500H and AVENTAGE RX-A1080 support the standard HDCP 2.2. Like most receivers, our models have a built-in phono stage for connecting a vinyl player.
Unlike the AVR-X4500H where 3 Multi zones is provided, the AVENTAGE RX-A1080 works with 2 Multi zones. For voice control in the AVR-X4500H is used Amazon Alexa, but in the AVENTAGE RX-A1080 is used Amazon Alexa, Google Assistant. There is an ECO mode in either AV receiver. The Denon AVR-X4500H and the Yamaha AVENTAGE RX-A1080 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.