Denon AVR-S660H (UK version)

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Overview
Denon AVR-S660H was introduced in 2021. It is equipped with 5 channel amplifier and is capable of 5.1 maximum channel processing.
We evaluated the Receiver 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.
Amplifier score is based on power ratings, minimum impedance load, power supply, transformer type, total harmonic distortion, damping factor, signal to noise ratio and other small details. Audio score depends on the number of channels, front wide channel support, maximum channel processing, support of audio formats, DAC specifications, room calibration algorithm... Video score is based on HDR, Dolby Vision and video signal passthrough and upscaling, analog to HDMI upconversion. Connectivity score is defined from all wired and wireless inputs and outputs, internet and bluetooth connections, HEOS, SONOS and others. Multizone score depends on the number of zones with their outputs. Radio score is evaluated form digital radio support and analog tuner with its frequency range, signal to noise ratio, harmonic distortion...
Pros and Cons
In this section we present pros and cons of Denon AVR-S660H.
PROS |
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👍 Certified 4 Ω Performance |
👍 Dolby TrueHD |
👍 Dolby Digital Plus |
👍 Dolby Pro Logic |
👍 DTS Neo |
👍 DTS-HD Master Audio |
👍 DTS-HD High Resolution Audio |
👍 DTS 96/24 |
👍 DTS Express |
👍 High Resolution Music Playback via USB and/or Network |
👍 Gapless Playback |
👍 DSD via USB |
👍 Dialog Normalization |
👍 Compressed Music Enhancer |
👍 Audyssey Dynamic EQ |
👍 Audyssey Dynamic Volume |
👍 Auto Speaker Calibration System with Mic. |
👍 Optimized Bass Redirection |
👍 HDR10 |
👍 HDR10+ |
👍 BT.2020 color space |
👍 Dolby Vision |
👍 HLG |
👍 QMS |
👍 Auto Low Latency Mode Pass-through |
👍 VRR |
👍 QFT |
👍 3-D Ready |
👍 4K or 8K Video Passthrough |
👍 4K or 8K Signal Upscaling |
👍 DLNA 1.5 |
👍 HEOS |
👍 Works with Amazon Alexa |
👍 Google assistant |
👍 Apple Siri |
👍 Ethernet |
👍 Wi-Fi |
👍 Bluetooth |
👍 Bluetooth Headphone Transmission |
👍 eARC |
👍 New HDCP Version |
👍 USB Input |
👍 Phono Input |
👍 Composite Video Inputs |
👍 Composite Video Outputs |
👍 Zones |
👍 Detachable Power Cord |
👍 Analog Tuner |
👍 Spotify |
👍 Tidal |
👍 Deezer |
👍 Napster |
👍 New Bluetooth Version |
CONS |
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👎 No Front Wide Channel Support |
👎 No Bi-amp Capability |
👎 Few Channel Processing |
👎 No Dolby Atmos |
👎 No Dolby Atmos Height Virtualization |
👎 No Dolby Surround Upmixer |
👎 No DTS:X |
👎 No DTS Neural:X |
👎 No DTS Virtual:X |
👎 No IMAX Enhanced |
👎 No Auro 3D with Auro-Matic Upmixer |
👎 No DSD via HDMI |
👎 No DTS Dialog Control |
👎 No High-resolution Music Enhancer |
👎 No Chromecast Built-In |
👎 Does Not Work with SONOS |
👎 Few HDMI Outputs |
👎 Few Analog Audio Line Inputs |
👎 No Component Video Inputs |
👎 No Multi-Channel Input |
👎 No Analog Pre-Outs |
👎 No Pandora |
👎 No SiriusXM Internet Radio |
Major Changes from its predecessor
Here we are comparing Denon AVR-S660H to its predecessor AVR-S650H and displaying the major changes.
UPGRADES | Denon AVR-S660H | vs | Denon AVR-S650H |
---|---|---|---|
HDR10+ | vs | ||
QMS | 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 |
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 |
For more detailed comparison between the models please visit Denon AVR-S660H vs Denon AVR-S650H.
Amplifier
Denon AVR-S660H has 5 channel amplifier and delivers 75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and also has a stable performance at 4 Ω load.
Video Features
The Receiver has 8K passthrough up to 60p and 8K upscaling up to 60p. It can bypass HDR10, HDR10+, Dolby Vision.
HDR10
High-dynamic-range (HDR) video has greater dynamic range than standard-dynamic-range (SDR) video with brigter whites and deeper blacks. HDR10 was announced on August 27, 2015, by the Consumer Technology Association and uses the wide-gamut Rec. 2020 color space. It sends static metadata via video stream to the TV which calibrates its screen brightness and color according to that. HDR10 supports up to 1000 nits of brightness and 10-bit color which corresponds to 1024 shades of the primary RGB colors.
Dolby Vision and HDR10+
Dolby Vision and HDR10+ are both updates to HDR10 by adding dynamic metadata that can be used to more accurately adjust brightness levels up to 10,000 nits maximum brightness on a scene-by-scene or frame-by-frame basis and support up to 12-bit color depth (4096 shades of RGB) and 8K resolution.
Audyssey
Denon AVR-S660H comes with Audyssey Dynamic EQ and Audyssey Dynamic Volume.
Audyssey Dynamic EQ selects the best possible frequency response and surround volume levels moment-by-moment. This ensures that the bass response, tonal balance and surround impression remain constant despite changes in volume. This is the first technology that carefully combines information from incoming source levels with actual output sound levels in the room, a pre-requisite for delivering a dynamic volume solution.
Your Listening experience can be greatly diminished when there are significant shifts in volume between television programs, commercials and within the program material itself. When this happens you must constantly adjust the volume to maintain your desired listening level. Audyssey Dynamic Volume monitors the volume of program material moment-by-moment and automatically adjusts it, maintaining the desired listening level for all content while optimizing the dynamic range to preserve impact.
Room Correction
Denon AVR-S660H comes with Audyssey MultEQ room correction system and includes the calibration microphone.
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.
Connectivity
Denon AVR-S660H can be connected to internet using ethernet cable or built-in wi-fi adapter. It can also connect to bluetooth devices via built-in bluetooth adapter. The Receiver works with Amazon Alexa and supports AirPlay 2. It has 6 HDMI inputs and HDCP 2.3 copy protection. There is a phono input with built-in phono stage for connecting the cartridge output of the turntable directly to the Receiver.
Front panel has USB input.


Specifications
Here we list all the available features and specifications of Denon AVR-S660H.
BASICS | |
---|---|
Brand | Denon |
Model | AVR-S660H |
Type | A/V Receiver |
Country | UK |
Release Year | 2021 |
AMPLIFIER | |
---|---|
Channels | 5.2 |
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 | |
---|---|
Maximum Channel Processing | 5.1 |
D.D.S.C. HD Digital | |
Alpha Processing | |
Air Studios Monitor Certification | |
Dolby Atmos | |
Dolby Atmos Height Virtualization | |
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 |
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 |
Multi-Channel Music File Playback via USB | |
Gapless Playback | |
DSD via HDMI | |
DSD via USB | 2-ch Input |
DSD to PCM Converter | |
USB DAC | |
Jitter Reduction | |
DTS Dialog 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 Dual Subwoofer Output |
CALIBRATION | |
---|---|
Auto Speaker Calibration System with Mic. | Audyssey MultEQ |
Optimized Bass Redirection | |
Bass Sync |
VIDEO | |
---|---|
Video Signal Type | NTSC/PAL |
HDR10 | |
HDR10+ | |
BT.2020 color space | |
Dolby Vision | |
HLG (Hybrid Log Gamma) | |
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 | |
---|---|
MHL Input | |
DLNA 1.5 | |
FireConnect | |
FlareConnect | |
HEOS | |
Chromecast Built-In | |
DTS Play-Fi | |
Works with Amazon Alexa | |
Google assistant | |
Apple Siri | |
Works with SONOS | |
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 | |
Ethernet | |
Ethernet Switch | |
Wi-Fi | |
Bluetooth | SBC |
Bluetooth Headphone Transmission | |
HDBaseT Compatible | |
Enhanced ARC | |
HDCP Version | 2.3 |
HDMI Input | 6 |
HDMI Output | 1 |
USB Input | 1 Front for USB memory |
USB DC Out Port | |
Analog Audio Line Input | 2 |
Analog Audio Line Output | |
Phono Input | |
Optical In | 2 |
Optical Out | |
Coaxial In/Out | / |
Composite Video Input | 2 |
Composite Video Output | 1 |
S-Video Input | |
S-Video Output | |
Component Video Input | |
Component Video Output | |
PC In | |
Multi-Channel Input | |
Analog Pre-Outs | 0.2 |
XLR Inputs | |
XLR Pre-outs | |
Front A/V Inputs | USB |
Speaker A/B | |
Headphone Out | 6.3 mm |
ZONES | |
---|---|
Zones | 1 |
RS-232 | |
+12V Trigger Output | |
Remote (IR) Input/Output | 0 / 0 |
MISC | |
---|---|
On-Screen Display | Hybrid Graphic User Interface |
GUI Languages | 9 |
Web Browser Control | |
IP Control for CI | |
Control4 SDDP | |
FL Display | 1 line |
Remote Controller | RC-1243 |
Pre-programmed / Learnable / LCD Display | / / |
Detachable Power Cord | |
Denon Link HD | |
Setup Assistant | |
Quick Select plus / Quick Select | / |
RADIO | |
---|---|
Analog Tuner | FM/AM with RDS |
Digital Radio | |
Internet Radio | TuneIn |
Pandora | |
Spotify | |
Tidal | |
Deezer | |
Napster | |
SiriusXM Internet Radio |
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 |
GENERAL | |
---|---|
ECO Mode / Hybrid Standby Function | |
Auto Power off | |
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) |
Warranty | 3 Years |
SPECS | |
---|---|
Power Output (8 Ω, 20 Hz - 20 kHz, 2 | 75 W (0.08% THD) |
Power Output (6 Ω, 1 kHz, 2 | 100 W (0.7% THD) |
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) | 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 Frequency | 87.5 MHz - 108.0 MHz |
FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.) | Mono: 2.8 µV (20.2 dBf) |
FM Effective Sensitivity | 1.2 µV (12.8 dBf) |
FM S/N Ratio | Mono/Stereo: 70 dB/67 dB |
FM Harmonic Distortion (IHF, 1 kHz) | Mono/Stereo: 0.7%/1.0% |
AM Frequency | 522 kHz - 1611 kHz |
AM Effective Sensitivity | 18 µV |
* - 480i/576i and 480p/576p only
** - 480i/576i only
*** - no 1080p/24 upconversion
**** - 1080p signal is not converted