Let's make the Denon AVR-S640H versus Yamaha RX-V485BL comparison. According to the results of our review, Denon AVR-S640H received 6.2 points out of 10 possible, and Yamaha RX-V485BL was rated 6.6 points. Both AV receivers were introduced in 2018. After comparison, it will become clear that among these two devices, the RX-V485BL is more suitable for the role of the heart of home theater system.
For the built-in amplifier, the devices received different marks - 6 and 5, respectively, on a 10-point scale.
The number of channels is equal to the number of possible connected speakers. The Denon AVR-S640H supports 5.2-channels sound, but Yamaha RX-V485BL supports a 5.1-channels configuration.
RMS stands for the actual power of the receiver. The higher this value, the louder the sound can be produced. The differences between the models in terms of RMS power are significant - for the AVR-S640H this value is 100/6 W/Ohm, and for the RX-V485BL it is 80/6 W/Ohm.
|Stereo power (RMS), W/Ohm||75/8, 100/6||80/6|
|Output impedance, Ohm||8, 6||6|
|THD in stereo, %||0.08||0.09|
After reviewing the audio features of each model, we can rate the AVR-S640H 6 out of 10, and the RX-V485BL - 9.
Bi-amping is the amplification of one speaker with two amplifiers. This amplification method has a positive effect on sound quality. Bi-amping is possible on the RX-V485BL.
Most receivers now come with a microphone included. It is with the help of this microphone that the auto-calibration system functions, which adjusts the sound of the receiver to the room.
|Digital to analog converter (DAC)||192 KHz/32-bit||Burr-Brown 384 KHz/32-bit|
|Pure direct (straight)||✔||✔|
|Auto speaker calibration||Audyssey MultEQ||YPAO|
|Speaker A/B switching||✖||✖|
|Other audio features||Audyssey Dynamic Volume, Audyssey Dynamic EQ, Compressed Audio Restorer, Hi-Res audio||CINEMA DSP, Compressed Music Enhancer, Virtual CINEMA FRONT|
The connectivity of competitors in our comparison is markedly different, Denon AVR-S640H scored 7, and Yamaha RX-V485BL scored 8 out of 10.
Bluetooth connection is now one of the main communication protocols for the receiver's control or even music broadcasting.
|USB||1 (USB 2.0)||1 (USB 2.0)|
Now music streaming services are gaining more and more popularity. They allow users to listen to millions of songs by subscription.
|Apple Music (AirPlay)||AirPlay, AirPlay 2||AirPlay, AirPlay 2|
|Other streaming services||Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud||has not|
The presence of many connectors makes the receiver more versatile. But there are also narrowly targeted models, the number of connectors which are limited to a certain area of use. And when choosing their own receiver, users need to consider exactly your goals for using the receiver. For extensive connection, both receivers got 6 points on our 10-point scale.
Denon AVR-S640H is equipped with 5/1 HDMI inputs and outputs, and Yamaha RX-V485BL has 4/1 HDMI inputs and outputs.
HDMI eARC is the next step in the development of audio return channel technology, which works in conjunction with HDMI 2.1. Using eARC provides the highest sound quality for home audio systems. HDMI eARC is available on Yamaha RX-V485BL.
Connecting a vinyl player or phonograph is possible using a Phono input which is represented by mini-jack or RCA connectors. Only the AVR-S640H has a Phono interface.
|HDMI ARC (Audio Return Channel)||✔||✔|
|HDMI eARC (Enhanced Audio Return Channel)||✖||✔|
|Digital content protection (HDCP)||HDCP 2.2||HDCP 2.2|
|Subwoofer output (LFE)||2||1|
|Headphone output||1 x 6.3||1 x 6.3|
|Optical digital input||2||2|
|Coaxial digital input||1||1|
|Phono (MM) input||✔||✖|
|Front panel connectors||USB, phones, setup mic||USB, phones, setup mic, AUX|
|Multi channel preamp output||✖||✖|
The AV receiver is the heart of the home theater. And in this case, support for all current video formats ensures the best user experience, so it is very important to consider this when choosing a device. Video features of the AVR-S640H were rated 6 out of 10 against the 8 for the RX-V485BL.
Most of the AV receivers have a video scaling function, it is the process of reformatting the video signal to a higher resolution without losing the quality of the image. Upscaling the video signal resolution is possible with Yamaha RX-V485BL.
|HDR (High Dynamic Range)||✔||HDR10|
|4K signal pass-through||4K/60Hz||4K/60Hz|
|8K signal pass-through||✖||✖|
|HDMI signal pass-through||✔||✔|
|3D signal pass-through||✔||✔|
|HDMI pass-through in standby mode||✔||✔|
|Analog to HDMI scaling||✖||✔|
|HDMI to HDMI scaling||✖||✔|
|Other video features||BT.2020, HLG||BT.2020, HLG|
In terms of evaluating additional features, the AVR-S640H got 10 points, but the RX-V485BL has 8.
|Voice control||Amazon Alexa, Google Assistant, Siri, Josh.AI||Google Assistant|
|App control||iPhone, iPad, iPod, Android||iPhone, iPad, iPod, Android|
|Display||colour OSD||colour OSD|
|Tuner||AM, FM||AM, FM|
|Auto power off||✔||✔|
|Graphical user interface (GUI)||✔||✖|
|Firmware update||network, USB||network, USB|
|Other additional features||IP Control, Web Control||has not|
As the center of a home media system, each multichannel receiver has an additional set of terminals for connecting the second set of speakers to create additional audio space in Zone 2 or even Zone 3 where audio can have the separate source.
|Multi-room zones||has not||2|
|Zone audio output||has not||speaker|
|Zone HDMI output||has not||✖|
|Multi-room control||has not||MusicCast|
|Remote control input/output (IR)||0/0||0/0|
|DC trigger output (12V)||0||0|
For the ability to create multichannel surround sound, each of the receivers received 5 points out of 10.
|Dolby (other)||Dolby Digital Plus, Dolby Pro Logic||Dolby Digital Plus, Dolby Pro Logic|
|DTS HD Master||✔||✔|
|DTS (other)||DTS 96/24, DTS-HD, DTS-EXPRESS, DTS-Surround, DTS Neo:6||DTS 96/24, DTS-HD, DTS-EXPRESS, DTS-Surround, DTS Neo:6|