Denon AVR-S640H vs Denon AVR-S660H review

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AV receivers comparison chart

Denon AVR-S640H vs Denon AVR-S660H review

Denon AVR-S640H
vs
Denon AVR-S660H

The Denon AVR-S640H vs Denon AVR-S660H comparison proves that these receivers have many common features.

Amplifier

Considered AV receivers have the same number of channels 5.2. And as for power, it is the same and equal to 75/8, 100/6. The THD is the same and is 0.08%.

Audio features

Competitors' digital to analog converter (DAC) is identical to 192 KHz/32-bit. None of the models support Bi-amping. The Denon AVR-S640H can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay, AirPlay 2. Spotify can be used on each receiver. The AVR-S640H can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, and the AVR-S660H can receive a content from Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud. HDMI signal transmission in standby mode is implemented in each of the devices. The AVR-S660H can scale the input HDMI signal, unlike the AVR-S640H. The HDR standard - Dolby Vision is supported by these receivers.

Extensive connections

The Denon AVR-S640H has 5/1 HDMI inputs/outputs versus 6/1 HDMI connectors of the Denon AVR-S660H.Denon AVR-S640H connectionsDenon AVR-S660H connections The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the AVR-S660H. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-S640H supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the AVR-S660H. These compared receivers have a built-in phono stage for connecting a vinyl player. Supported voice control technologies are identical - Amazon Alexa, Google Assistant, Siri, Josh.AI. It is also worth noting that the ECO mode is presented in each of the receivers. Both AVR-S640H and AVR-S660H can be configured using the Setup assistant.

Multichannel surround

Only the AVR-S660H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-S660H.

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General

Item

Denon AVR-S640H
Denon AVR-S660H

Model

AVR-S640H
AVR-S660H

Brand

Denon
Denon

Reviews

200
0

Amplifier

Channels

5.2
5.2

Stereo power (RMS), W/Ohm

75/8, 100/6
75/8, 100/6

Output impedance, Ohm

8, 6
8, 6

Frequency response

10Hz-100KHz
10Hz-100KHz

THD in stereo, %

0.08
0.08

Audio features

Digital to analog converter (DAC)

192 KHz/32-bit
192 KHz/32-bit

Bi-amping

Pure direct (straight)

Auto speaker calibration

Audyssey MultEQ
Audyssey MultEQ

Speaker A/B switching

Other audio features

Audyssey Dynamic Volume, Audyssey Dynamic EQ, Compressed Audio Restorer, Hi-Res audio
Audyssey Dynamic Volume, Audyssey Dynamic EQ, Hi-Res audio

Connectivity

Wi-Fi

2.4/5GHz

USB

1 (USB 2.0)
1 (USB 2.0)

Bluetooth

Ethernet (RJ45)

1
1

DLNA

MHL

Streaming services

Apple Music (AirPlay)

AirPlay, AirPlay 2
AirPlay, AirPlay 2

Amazon Music

Spotify

Other streaming services

Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud
Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud

Extensive connection

HDMI input/output

5/1
6/1

HDMI ARC (Audio Return Channel)

HDMI eARC (Enhanced Audio Return Channel)

HDMI CEC

Digital content protection (HDCP)

HDCP 2.2
HDCP 2.3

Subwoofer output (LFE)

2
2

Headphone output

1 x 6.3
1 x 6.3

Optical digital input

2
2

Coaxial digital input

1
1

Composite input

2
2

Component input/output

0/0
0

Phono (MM) input

Front panel connectors

USB, phones, setup mic
USB, phones, setup mic

Multi channel preamp output

Video features

HDR (High Dynamic Range)

HDR10+

4K signal pass-through

4K/60Hz
4K/120Hz

8K signal pass-through

8K/60Hz

HDMI signal pass-through

3D signal pass-through

HDMI pass-through in standby mode

Video conversion

Analog to HDMI scaling

HDMI to HDMI scaling

Dolby Vision

Other video features

BT.2020, HLG
Dynamic HDR, HLG, BT.2020

Additional features

Voice control

Amazon Alexa, Google Assistant, Siri, Josh.AI
Amazon Alexa, Google Assistant, Siri, Josh.AI

App control

iPhone, iPad, iPod, Android
iPhone, iPad, iPod, Android

Display

colour OSD
colour OSD

Tuner

AM, FM
AM, FM

Sleep timer

Auto power off

ECO mode

Graphical user interface (GUI)

Setup assistant

Firmware update

network, USB
network, USB

Other additional features

IP Control, Web Control
Web Control, App Control

Multi-room

Multi-room zones

has not
has not

Zone audio output

has not
has not

Zone HDMI output

has not
has not

Multi-room control

has not
HEOS App, Denon 2016 AVR Remote

RS-232

0
0

Remote control input/output (IR)

0/0
0/0

DC trigger output (12V)

0
0

Multichannel surround

Dolby Atmos

Dolby TrueHD

Dolby Surround

Dolby (other)

Dolby Digital Plus, Dolby Pro Logic
Dolby Atmos Height Virtualization

DTS:X

DTS HD Master

DTS Virtual:X

DTS Neural:X

DTS (other)

DTS 96/24, DTS-HD, DTS-EXPRESS, DTS-Surround, DTS Neo:6
DTS-ES, DTS 96/24, DTS-HD, DTS-EXPRESS

Auro-3D

IMAX Enhanced

Multichannel stereo

Audio file formats

MP3

WMA

AAC

WAV

FLAC

ALAC

Other audio file formats

has not
AIFF, DSD

Power

Operational power consumption, W

340
340

Standby consumption, W

0.1
0.1

Removable power cord

User manual

Manual

Dimensions

Size W x H x D, cm/inches

43.5 x 15.9 x 33/17 x 6.1 x 13
43.4 x 33.9 x 21.5/17 x 13.3 x 8.4

Weight, kg/lbs

7.7/17.2
7.8/17

Other

Release year

2018
2021
Denon AVR-S640H
Denon AVR-S660H
Denon AVR-S640H
Denon AVR-S660H

AV receivers SoundInspiration comparison rating

  • better
  • worse
  • 6.2
  • 6.7
  • 6.2Denon AVR-S640H
  • 6.7Denon AVR-S660H