Denon AVR-S650H vs Denon AVR-S640H

Here we are comparing Denon AVR-S650H to Denon AVR-S640H to reveal their common strengths and weaknesses as well as the differences between them which will help you in making a correct decision before the purchase. Both receivers have 5 channel and equally powerful amplifiers.

Now that we've looked at the most essential specifications and gained a basic understanding of these receivers, we can delve into more details and see the differences between them.

This section shows those features and specifications which are the reason to choose Denon AVR-S650H over Denon AVR-S640H.

This section shows those features and specifications which are the reason to choose Denon AVR-S640H over Denon AVR-S650H.

We already listed pros and cons of each model. However, you may also find useful to look at their common strengths and weaknesses shown side-by-side.

Amplifier

Speaker Configurations

Denon AVR-S650H's and Denon AVR-S640H's amplifiers can be assigned for different speaker configurations.

• Configurations: Available configurations are:
Denon AVR-S650H: 5.2 with internal amplifier.
Denon AVR-S640H: 5.2 with internal amplifier.

Enhanced Audio Return Channel (eARC)

Denon AVR-S650H supports Audio Return Channel (ARC) which allows the compatible TV to send audio signal to the a/v receiver 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: Both receivers come 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.
• Compressed Music Enhancer: Denon AVR-S650H and Denon AVR-S640H feature Compressed Music Enhancer which enhances the quality of the music files with lossy compression.

Room Calibration

Denon AVR-S650H and Denon AVR-S640H come with Audyssey MultEQ room correction system.

• 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.

HDMI

Denon AVR-S650H and Denon AVR-S640H come with 5 HDMI inputs. It has 1 output.

• 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K 50/60Hz 4:4:4 video signal.
• 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% (available on both models).
• HDCP Copy Protection: Denon AVR-S650H is HDCP 2.3.0 and Denon AVR-S640H is HDCP 2.2.0 compliant which is a requirement for 4K/HDR copy-protected content transmission.
• 3D Ready: Both receivers are able to pass 3D video through HDMI.

HDR (High Dynamic Range)

Both receivers support HDR10, Dolby Vision 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.
• 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.
• 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.

Gaming Features

Both receivers support Auto Low Latency Mode (ALLM) 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.

Audio

• Phono Input: There is an MM phono input on Denon AVR-S650H and Denon AVR-S640H with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the receiver.
• Analog Line Inputs: There are 2 pair of line inputs on both receivers for connecting sources with analog outputs.
• Digital Inputs: 2 optical inputs are available on Denon AVR-S650H and 2 optical inputs and 1 coaxial input are available on Denon AVR-S640H for digital audio connections.
• Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel of each receiver.

Video

• HDMI:
Denon AVR-S650H
Inputs: 5   Outputs: 1
8K Inputs: 0.
Denon AVR-S640H
Inputs: 5   Outputs: 1
8K Inputs: 0.
• Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
Denon AVR-S650H
Inputs: 2   Outputs: 1.
Denon AVR-S640H
Inputs: 2   Outputs: 1.

Front A/V Inputs

• Denon AVR-S650H: USB
• Denon AVR-S640H: USB

Denon AVR-S650H

Denon AVR-S640H