Denon AVC-S660H

Denon AVC-S660H was introduced in 2021. It is equipped with 5 channel amplifier with 75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) power per channel and is capable of 5.1 maximum channel processing. It passes 8K/60Hz and 4K/120Hz and upscales from 1080p and 4K up to 8K 50/60Hz and 4K 50/60Hz video signal.

We evaluated the a/v amplifier and gave 80 overall score out of 100. Our ranking system is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

For more details about the ranking please go to    Evaluation section.

In this section we present pros and cons of Denon AVC-S660H.

In 2021 Denon released 6 new receivers. Here is the lineup:

You can view their side-by-side comparison here: Denon AVC-X8500HA vs AVR-X1700H vs AVR-X1700H DAB vs AVR-S760H vs AVR-S660H vs AVC-S660H.

Denon AVC-S660H has replaced AVR-S650H. Here we present differences between these two models.

UPGRADES	Denon AVC-S660H	vs	Denon AVR-S650H
HDR10+		vs
Dynamic HDR		vs
VRR		vs
QFT		vs
Video Signal Passthrough	up to 8K 50/60Hz (YCbCr 4:2:0/8-bit) and 4K 100/120Hz (RGB/YCbCr 4:4:4/8, 10-bit and YCbCr 4:2:2/12-bit)	vs	up to 4K 50/60Hz 4:4:4
Video Signal Upscaling	from 1080p and 4K up to 8K 50/60Hz and 4K 50/60Hz	vs
More HDMI Inputs	6	vs	5
More 8K Inputs	3	vs
More RCA Line Inputs	3	vs	2
Wi-Fi Standard	IEEE 802.11 a/b/g/n/ac	vs	IEEE 802.11 a/b/g/n
Newer Bluetooth Version	4․2	vs	3․0 + EDR

DOWNGRADES	Denon AVC-S660H	vs	Denon AVR-S650H
Analog Tuner		vs	FM/AM with RDS

For more detailed comparison between the models please visit Denon AVC-S660H vs AVR-S650H.

Denon AVC-S660H's 5 channel amplifier can be assigned for different speaker configurations.

• Configurations: Available configurations are:
5.2 with internal amplifier.

Denon AVC-S660H features 3 HDMI 2.1 inputs with 8K support and 3 inputs with 4K support. It has 1 output.

• 8K/60Hz and 4K/120Hz Passthrough: 3 out of 6 inputs pass up to 8K 50/60Hz (YCbCr 4:2:0/8-bit) and 4K 100/120Hz (RGB/YCbCr 4:4:4/8, 10-bit and YCbCr 4:2:2/12-bit) and the rest of the inputs pass up to 4K 50/60Hz 4:4:4 video signal.
• 8K Upscaling: Denon AVC-S660H can upscale from 1080p and 4K up to 8K 50/60Hz and 4K 50/60Hz from HDMI sources.
• BT.2020 Color Space: BT.2020 or Rec. 2020 is a color standard which delivers a wider color gamut compared to Rec. 709. It covers approximately 75% of the total visual spectrum while the Rec. 709 covers only 35%.
• HDCP 2.3 Copy Protection: All inputs and outputs are HDCP 2.3 compliant which is a requirement for 4K/HDR copy-protected content transmission.
• 3D Ready: Denon AVC-S660H is able to pass 3D video through HDMI.

HDR (High Dynamic Range)

Denon AVC-S660H supports HDR (high dynamic range) video formats such as HDR10, HDR10+, Dolby Vision, Dynamic HDR and Hybrid Log-Gamma via HDMI ports. High dynamic range video has greater dynamic range than standard dynamic range (SDR) video with brighter whites and deeper blacks. The result is greater contrast and more details in dark and bright areas, better color and depth.

Enhanced Audio Return Channel (eARC)

Audio Return Channel (ARC) feature allows the compatible TV to send audio signal to the a/v amplifier through the same HDMI cable which is used to send audio and video signals to the TV. So one HDMI cable is used to transfer audio signal in both directions. New Enhanced ARC will support uncompressed audio formats such as Dolby Atmos, DTS:X, Dolby TrueHD and DTS HD Master Audio whereas the previous ARC could support only Dolby Digital, Dolby Digital Plus, DTS, DTS HD, and PCM.

Gaming Features

Denon AVC-S660H supports Auto Low Latency Mode (ALLM), Variable Refresh Rate (VRR) and Quick Frame Transport (QFT) for lag-free and smooth gaming.

VIDEO FEATURES
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDMI Version	2.1
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.3
QMS (Quick Media Switching)
ALLM (Auto Low Latency Mode)
VRR (Variable Refresh Rate)
QFT (Quick Frame transport)
DSC (Display Stream Compression)
3-D Ready
Video Signal Passthrough	up to 8K 50/60Hz (YCbCr 4:2:0/8-bit) and 4K 100/120Hz (RGB/YCbCr 4:4:4/8, 10-bit and YCbCr 4:2:2/12-bit)
Video Signal Upscaling	from 1080p and 4K up to 8K 50/60Hz and 4K 50/60Hz

Denon AVC-S660H comes with Audyssey MultEQ room correction system and includes the calibration microphone.

• Audyssey Room Calibration: Audyssey is an acoustic measurement technology which automatically restores the acoustic distortion caused by the acoustic behaviour of a room with only a push on a button. Audyssey equalization provides an clear, accurate, natural sound with voices and dialog that become focused and intelligible, restoring the musical balance. Musical instruments and sound effects become precisely localized and the surround soundstage is made seamless and enveloping.

Audio

• Phono Input: There is an MM phono input with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the a/v amplifier.
• Analog Line Inputs: There are 3 line inputs for analog audio connection.
• Digital Inputs: 2 optical inputs are available for digital audio connection.
• Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel.

Video

• HDMI:
Inputs: 6   Outputs: 1
8K Inputs: 3
• Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
Inputs: 2   Outputs: 1

Front A/V Inputs

• USB

In 2023 Denon AVC-S660H was replaced by Denon AVC-S670H. Let us now have a look at some important differences between Denon AVC-S660H and its successor.

UPGRADES	Denon AVC-S670H	vs	Denon AVC-S660H
USB DC Out Port		vs
Newer Bluetooth Version	5․0	vs	4․2

DOWNGRADES	Denon AVC-S670H	vs	Denon AVC-S660H
Less Composite Video Inputs		vs	2
Less Composite Video Outputs		vs	1

For more detailed comparison between the models please visit Denon AVC-S660H vs AVC-S670H.

GENERAL
Brand	Denon
Model	AVC-S660H
Type	A/V Amplifier
Country	UK
Release Year	2021
Predecessor	Denon AVR-S650H
Successor	Denon AVC-S670H

AMPLIFIER
Channels	5.2
Power Output	75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
Front Wide Channel Support
Discrete Amplification
THX™ Certification
Continuous 6 Ω Rated
Certified 4 Ω Performance
Mono Block Power Amplifier Construction
Bi-amp Capability

AUDIO FEATURES
Maximum Channel Processing	5.1
D.D.S.C. HD Digital
Alpha Processing
Air Studios Monitor Certification
Dolby Atmos
Dolby Atmos Height Virtualization
Dolby Atmos Music
Dolby TrueHD
Dolby Digital Plus
Dolby Surround Upmixer
Dolby Pro Logic	PLII
Dolby Digital EX
Surround EX
DTS:X
DTS Neural:X
DTS Virtual:X
DTS Neo	Neo:6
DTS-HD Master Audio
DTS-HD High Resolution Audio
DTS 96/24
DTS Express
DTS-ES
IMAX Enhanced
Auro 3D with Auro-Matic Upmixer
PCM	2-ch/Multi-ch Input
Network Audio Formats	MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, DSD
Music Playback via USB	MP3, WMA, AAC, Apple Lossless, WAV, FLAC, DSD
High Resolution Music Playback via USB and/or Network	up to 192 kHz
High Resolution Audio Formats via USB	Apple Lossless, WAV, FLAC, DSD
Gapless Playback
DSD via HDMI
DSD via USB	2-ch Input
DSD to PCM Converter
USB DAC
Jitter Reduction
DTS Dialogue Control
Dialog Enhancement
Dialog Level Adjustment
Dialog normalization
Dialogue Lift
Compressed Music Enhancer
High-resolution Music Enhancer
Audyssey Dynamic EQ
Audyssey Dynamic Volume
Audyssey LFC
Audyssey Sub EQ HT
Audyssey DSX
Direct Mode
Pure Direct Mode
Independent Subwoofer Outputs

CALIBRATION
Auto Speaker Calibration System with Mic.	Audyssey MultEQ
Optimized Bass Redirection
Bass Sync

VIDEO FEATURES
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDMI Version	2.1
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.3
QMS (Quick Media Switching)
ALLM (Auto Low Latency Mode)
VRR (Variable Refresh Rate)
QFT (Quick Frame transport)
DSC (Display Stream Compression)
3-D Ready
Video Signal Passthrough	up to 8K 50/60Hz (YCbCr 4:2:0/8-bit) and 4K 100/120Hz (RGB/YCbCr 4:4:4/8, 10-bit and YCbCr 4:2:2/12-bit)
Video Signal Upscaling	from 1080p and 4K up to 8K 50/60Hz and 4K 50/60Hz
Analog To HDMI Upconversion
Component Video Upscaling
Analog to Analog Video conversion
isf Certified Calibration Control

CONNECTIVITY
Wi-Fi
Bluetooth	SBC
Bluetooth Headphone Transmission
Works with Amazon Alexa
Google Assistant
Chromecast Built-In
Apple Siri
Works with SonoS
HEOS
DTS Play-Fi
MHL Input
DLNA 1.5
AirPlay	AirPlay 2
Apple Product Connection	iPod, iPhone and iPad
Remote App	Denon 2016 AVR Remote App for iOS and Android devices and Kindle Fire
InstaPrevue Input Source Prevue

TERMINALS
HDMI Inputs	6
HDMI Outputs	1
8K Inputs	3
USB Input	1 Front for USB memory
USB DC Out Port
Optical Inputs	2
Optical Outputs
Coaxial Inputs
RCA Line Inputs	3
RCA Line Outputs
XLR Line Inputs
Phono Input
Multi-Channel Input
RCA Pre-Outs	0.2
XLR Pre-outs
Composite Video Inputs	2
Composite Video Outputs	1
S-Video Inputs
S-Video Outputs
Component Video Inputs
Component Video Outputs
Ethernet
Ethernet Switch
PC In
Front A/V Inputs	USB
Speaker A/B
Headphone Out	6.3 mm (1/4")
Detachable Power Cord

ZONES
Number of Zones	1
RS-232C Interface
+12V Trigger Output
Remote (IR) Input/Output	0 / 0

MISCELLANEOUS
On-Screen Display	Hybrid Graphic User Interface
GUI Languages	9
Web Control
IP Control
Control4 SDDP
Display	1 line
Remote Controller	RC-1243
Pre-programmed / Learnable / LCD Display	/ /
Denon Link HD
Setup Assistant
Quick Select plus / Quick Select	/

RADIO
Analog Tuner
Digital Radio
Internet Radio	TuneIn
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM

CONSTRUCTION
Front Panel	not Metal
Speaker Terminals	5
Large Speaker Terminals	5
Color-Coded Speaker Terminals
Transparent High-Grade Speaker Terminals
High Grade Audio Components
Gold plated RCA terminals

POWER
Power Supply	AC 230 V, 50/60 Hz
Power Consumption	340 W
No Sound Power	ECO On/Off: 29 W/39 W
Standby Power	0.1 W
ECO Mode / Hybrid Standby Function
Auto Power off

PHYSICAL
Dimensions (W x H x D)	434 mm x 151 mm x 339 mm (with antenna: 434 mm x 215 mm x 339 mm) 17 1/8" x 6" x 13 3/8" (with antenna: 17 1/8" x 8 1/2" x 13 3/8")
Dimensions of Package (W x H x D)	523 mm x 232 mm x 435 mm 20.6"e; x 9.1"e; x 17.1"e;
Weight	7.8 kg (17 lbs 3 oz)
Weight of Package	9.7 kg (21.4 lbs)

SPECIFICATIONS
Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	75 W (0.08% THD)
Power Output (6 Ω, 1 kHz, 2 channel driven, FTC)	100 W (0.7% THD)
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)	150 W (10% THD)
Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)	135 W (1% THD)
Phono Distortion	0.03% (1 kHz, 3 V)
Input Sensitivity and Impedance (Line)	200 mV/47 kΩ
Input Sensitivity and Impedance (Phono MM)	2.5 mV
S/N Ratio (Line, IHF-A)	98 dB
S/N Ratio (Phono MM, IHF-A)	74 dB
Phono RIAA Deviation	±1 dB (20-20 kHz)
Frequency Response (Analog In)	+1/-3 dB (10 Hz to 100 kHz, Direct mode)
DSD Sampling Rates via USB	5.6 MHz, 2.8 MHz
Video Input Sensitivity/Output Level and Impedance	1 Vp-p/75 Ω (Composite)
Video Frequency Response	5 Hz to 10 MHz, 0 dB/-3 dB (Composite)
Ethernet Standard	100BASE-TX
Wi-Fi Standard	IEEE 802.11 a/b/g/n/ac
Wi-Fi Terminal Frequency	5 GHz, 2.4 GHz
Bluetooth Version	4․2
Bluetooth Frequency	2.4 GHz
USB Terminal	USB2.0 5V, 1 A
FM Harmonic Distortion (IHF, 1 kHz)	Mono/Stereo: 0.7%/1.0%
Warranty	3 Years

* - 480i/576i and 480p/576p only
** - 480i/576i only
*** - no 1080p/24 upconversion
**** - 1080p signal is not converted