Disclosure: We earn money from the affiliate links to products associated with content in this article.
Overview
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.
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.
Denon AVC-S660H features 5 channel power amplifier. It is rated at 75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.
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
Speaker Configurations
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
DECODING
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
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.
Sound Processing
Audyssey: Denon AVC-S660H comes with Audyssey Dynamic EQ and Dynamic Volume.
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.
Dynamic Volume: 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 Calibration
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.
Video Section
HDMI 2.1
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. 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.
HDR10: HDR10 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 10-bit color which corresponds to 1024 shades of the primary RGB colors. It is technically limited to a maximum of 10,000 nits peak brightness, however common HDR10 contents are mastered with peak brightness from 1,000 to 4,000 nits.
HDR10+: HDR10+ is an HDR video technology that adds dynamic metadata to HDR10 source files. The dynamic metadata are used to adjust brightness levels on a scene-by-scene or even frame-by-frame basis. HDR10+ supports maximum of 10,000 nits peak brightness and 10-bit or more (up to 16-bit) color bit depth. It uses Samsung's dynamic metadata defined in SMPTE ST 2094-40.
Dolby Vision: Dolby Vision is a set of technologies developed by Dolby Laboratories for high dynamic range (HDR) video. It covers content creation, distribution, and playback. Like HDR10+, it includes dynamic metadata that are used to adjust and optimize each frame of the HDR video to the consumer display's capabilities in a way specified by the content creator. Dolby Vision allows for a maximum resolution of 8K up to 12-bit color depth, maximum peak brightness of 10,000 nits and a color gamut up to Rec. 2020. It uses Dolby's proprietary dynamic metadata defined in SMPTE ST 2094-10.
Dynamic HDR: Dynamic HDR enables a noticeable progression in overall video image quality from SDR to static HDR, and now static HDR to dynamic HDR. Dynamic HDR support ensures every moment of a video is displayed at its ideal values for depth, detail, brightness, contrast, and wider color gamuts - on a scene-by-scene or even a frame-by-frame basis. HDR-enhanced content is available for movies, videos, TV shows, video and PC games and VR.
Hybrid Log-Gamma (HLG): The Hybrid Log-Gamma (HLG) is a transfer function developed mainly for HDR live video feed and over-the-air broadcasts. It is an HDR format that uses BT.2020 color primaries and a bitdepth of 10-bit. It is backward compatible with the transfer function of SDR and is designed to be better-suited for television broadcasting, where the metadata required for other HDR formats is not backward compatible with non-HDR displays. HLG defines a non-linear optical-electro transfer function, in which the lower half of the signal values use a gamma curve and the upper half of the signal values use a logarithmic curve.
Denon AVC-S660H
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.
Auto Low Latency Mode (ALLM): Auto Low Latency Mode enables the ideal latency setting to automatically be set allowing for smooth, lag-free and uninterrupted viewing and interactivity. When the receiver detects a gaming signal it will enter ALLM. The signal will also be sent to the TV causing it to automatically switch to a low-latency, low-lag mode for gaming. Some functions will not be available on the receiver and TV during ALLM.
Variable Refresh Rate (VRR): VRR enables a gaming source such as a console or computer to deliver video frames as fast as it can, which in many cases is slower than the normal static refresh rate. It allows the TV to adapt to certain frame rate which reduces or eliminates lag, judder and frame tearing for more fluid and better detailed gameplay.
Quick Frame Transport (QFT): QFT reduces latency for smoother no-lag gaming, and real-time interactive virtual reality. It transports each frame at a higher rate to decrease display latency, which is the amount of time between a frame being ready for transport in the GPU and that frame being completely displayed.
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
Check out the receivers which are frequently compared to Denon AVC-S660H.
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
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
Denon AVC-S660H Evaluation
We evaluate Denon AVC-S660H and give score of 80 out of 100. We also give separate scores for 6 different categories according to the available features and specifications some of which are listed below. These evaluations are relative and may change each time a new receiver is added to the database.
OVERALL
80
Amplifier
GOOD
84
We give Denon AVC-S660H a score of 84 for Amplifier features.
Few Channels - 5.2
Low Power Output - 75 W
Audio Features
AVERAGE
64
We give Denon AVC-S660H a score of 64 for Audio Features features.
Few Channels - 5.2
No Front Wide Channel Support
5.1 Channel Processing
No Dolby Atmos
No Dolby Atmos Height Virtualization
No DTS:X
No IMAX Enhanced
No Auro 3D with Auro-Matic Upmixer
No DSD via HDMI
Video Features
EXCELLENT
99
We give Denon AVC-S660H a score of 99 for Video Features features.
HDR10
HDR10+
Dolby Vision
HDMI Version
Auto Low Latency Mode Pass-through
VRR
QFT
8K Passthrough
8K Upscaling
Connectivity
EXCELLENT
86
We give Denon AVC-S660H a score of 86 for Connectivity features.
eARC
New HDCP Version
Wi-Fi
Bluetooth
Works with Amazon Alexa
Google Assistant
HEOS
6 HDMI Inputs
1 HDMI Outputs
3 8K Inputs
USB Input
Few RCA Line Inputs
Phono Input
No RCA Pre-Outs
Composite Video Inputs
Ethernet
Bluetooth 4․2
Zones
AVERAGE
55
We give Denon AVC-S660H a score of 55 for Zones features.
No Zones
Radio
GOOD
82
We give Denon AVC-S660H a score of 82 for Radio features.
No Analog Tuner
No Pandora
Spotify
Tidal
For a full specification list please go to the specifications page:
Amazon Affiliate Disclosure
ZKelectronics is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon (.com, .co.uk, .ca, etc) and any other websites that may be affiliated with Amazon Service LLC Associates Program.