Let's make the Sony STR-DN1080 versus Denon AVR-S640H comparison. According to the results of our review, Sony STR-DN1080 received 7.3 points out of 10 possible, and Denon AVR-S640H was rated 6.2 points. The release date of STR-DN1080 is 2017, and AVR-S640H is 2018. After comparison, it will become clear that among these two devices, the STR-DN1080 is more suitable for the role of the heart of home theater system.
For the built-in amplifier, the devices received different marks - 7 and 6, respectively, on a 10-point scale.
The number of channels is equal to the number of possible connected speakers. The Sony STR-DN1080 supports 7.2-channels sound, but Denon AVR-S640H supports a 5.2-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 STR-DN1080 this value is 120/6 W/Ohm, and for the AVR-S640H it is 100/6 W/Ohm.
|Stereo power (RMS), W/Ohm||120/6||75/8, 100/6|
|Output impedance, Ohm||6||8, 6|
|THD in stereo, %||0.09||0.08|
After reviewing the audio features of each model, we can rate the STR-DN1080 7 out of 10, and the AVR-S640H - 6.
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 only on the STR-DN1080.
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)||96 KHz/24-bit||192 KHz/32-bit|
|Pure direct (straight)||✔||✔|
|Auto speaker calibration||DCAC EX||Audyssey MultEQ|
|Speaker A/B switching||✖||✖|
|Other audio features||Hi-Res audio, DSEE HX||Audyssey Dynamic Volume, Audyssey Dynamic EQ, Compressed Audio Restorer, Hi-Res audio|
The connectivity of competitors in our comparison is markedly different, Sony STR-DN1080 scored 8, and Denon AVR-S640H scored 7 out of 10.
Bluetooth connection is now one of the main communication protocols for the receiver's control or even music broadcasting.
DLNA is the perfect way to use your local cloud storage to stream movies and music directly to a TV. You can use the DLNA protocol only with Sony STR-DN1080.
|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, AirPlay 2|
|Other streaming services||TIDAL, Pandora||Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud|
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, Sony STR-DN1080 got 7 points, but Denon AVR-S640H received 6 points.
Sony STR-DN1080 is equipped with 6/2 HDMI inputs and outputs, and Denon AVR-S640H has 5/1 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 only on Sony STR-DN1080.
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||2|
|Headphone output||1 x 6.3||1 x 6.3|
|Optical digital input||1||2|
|Coaxial digital input||1||1|
|Phono (MM) input||✖||✔|
|Front panel connectors||USB, phones, setup mic||USB, phones, setup mic|
|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 STR-DN1080 were rated 7 out of 10 against the 6 for the AVR-S640H.
|HDR (High Dynamic Range)||✔||✔|
|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||✔||✔|
|Video conversion||analog to HDMI||✖|
|Analog to HDMI scaling||✔||✖|
|HDMI to HDMI scaling||✖||✖|
|Other video features||has not||BT.2020, HLG|
In terms of evaluating additional features, the STR-DN1080 got 9 points, but the AVR-S640H has 10.
Denon AVR-S640H has the ECO mode.
|Voice control||Google assistant||Amazon Alexa, Google Assistant, Siri, Josh.AI|
|App control||iPhone, iPad, iPod, Android||iPhone, iPad, iPod, Android|
|Tuner||AM, FM||AM, FM|
|Auto power off||✔||✔|
|Graphical user interface (GUI)||✔||✔|
|Firmware update||network, USB||network, USB|
|Other additional features||NFC||IP Control, Web Control|
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||2||has not|
|Zone audio output||speaker||has not|
|Zone HDMI output||✔||has not|
|Multi-room control||Music Center||has not|
|Remote control input/output (IR)||1/1||0/0|
|DC trigger output (12V)||0||0|
Sony STR-DN1080 got 7 points for the multichannel surround sound and Denon AVR-S640H got 5.
Dolby Atmos' particularity is that this is the object-oriented sound format, that is, each audio signal object is independently sounded and connected to its spatial position. Sony STR-DN1080 can create 3D sound due to the Dolby Atmos support.
DTS:X is an algorithm used by the processor to create sound scenes, where sounds connected directly to objects rather than channels, and to determine the optimum sound output distribution in space. Surround sound with DTS:X is available only on the STR-DN1080.
|Dolby (other)||Dolby Digital Plus||Dolby Digital Plus, Dolby Pro Logic|
|DTS HD Master||✔||✔|
|DTS (other)||DTS-ES, DTS 96/24||DTS 96/24, DTS-HD, DTS-EXPRESS, DTS-Surround, DTS Neo:6|