Being able to compare Denon AVR-X3700H and Denon AVR-S660H gave us an insight into what of them would be better for home theater configuration. According to the results of our review, Denon AVR-X3700H received 8.8 points out of 10 possible, and Denon AVR-S660H was rated 6.7 points. The release date of AVR-X3700H is 2020, and AVR-S660H is 2021. AVR-X3700H is more performable in terms of audio broadcast than the AVR-S660H.
For the built-in amplifier, the devices received different marks - 8 and 6, respectively, on a 10-point scale.
The number of channels is equal to the number of possible connected speakers. The Denon AVR-X3700H supports 9.2-channels sound, but Denon AVR-S660H supports a 5.2-channels configuration.
RMS stands for the actual power of the receiver. The higher this value, the louder the sound can be produced. The differences between the models in terms of RMS power are significant - for the AVR-X3700H this value is 105/8 W/Ohm, and for the AVR-S660H it is 75/8 W/Ohm.
|Stereo power (RMS), W/Ohm||105/8, 135/6||75/8, 100/6|
|Output impedance, Ohm||8, 6||8, 6|
|THD in stereo, %||0.08||0.08|
After reviewing the audio features of each model, we can rate the AVR-X3700H 9 out of 10, and the AVR-S660H - 6.
Bi-amping is the amplification of one speaker with two amplifiers. This amplification method has a positive effect on sound quality. Bi-amping is possible only on the AVR-X3700H.
Pure Direct mode feeds sound directly to the amplifier and bypasses any DSP processing. Only Denon AVR-X3700H has Pure Direct mode.
Most receivers now come with a microphone included. It is with the help of this microphone that the auto-calibration system functions, which adjusts the sound of the receiver to the room.
Speaker A/B switching allows you to change between the main and sub speaker set. Denon AVR-X3700H can work with the main and additional set of speakers - and switch between them.
|Digital to analog converter (DAC)||N/A||192 KHz/32-bit|
|Pure direct (straight)||✔||✖|
|Auto speaker calibration||Audyssey MultEQ XT32||Audyssey MultEQ|
|Speaker A/B switching||✔||✖|
|Other audio features||Audyssey Dynamic Volume, Audyssey Dynamic EQ, Audyssey LFC, Hi-Res audio||Audyssey Dynamic Volume, Audyssey Dynamic EQ, Hi-Res audio|
The connectivity of competitors in our comparison is markedly different, Denon AVR-X3700H scored 10, and Denon AVR-S660H scored 7 out of 10.
Bluetooth connection is now one of the main communication protocols for the receiver's control or even music broadcasting.
DLNA is the perfect way to use your local cloud storage to stream movies and music directly to a TV. You can use the DLNA protocol only with Denon AVR-X3700H.
|USB||1 (USB 2.0)||1 (USB 2.0)|
Now music streaming services are gaining more and more popularity. They allow users to listen to millions of songs by subscription.
|Apple Music (AirPlay)||AirPlay, AirPlay 2||AirPlay, AirPlay 2|
|Other streaming services||Deezer, TIDAL, Pandora, SiriusXM, Qobuz, TuneIn Radio||Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud|
The presence of many connectors makes the receiver more versatile. But there are also narrowly targeted models, the number of connectors which are limited to a certain area of use. And when choosing their own receiver, users need to consider exactly your goals for using the receiver. For extensive connection, Denon AVR-X3700H got 9 points, but Denon AVR-S660H received 7 points.
Denon AVR-X3700H is equipped with 7/3 HDMI inputs and outputs, and Denon AVR-S660H has 6/1 HDMI inputs and outputs.
|HDMI ARC (Audio Return Channel)||✔||✔|
|HDMI eARC (Enhanced Audio Return Channel)||✔||✔|
|Digital content protection (HDCP)||HDCP 2.3||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||2||1|
|Phono (MM) input||✔||✔|
|Front panel connectors||USB, phones, setup mic||USB, phones, setup mic|
|Multi channel preamp output||✔||✔|
The AV receiver is the heart of the home theater. And in this case, support for all current video formats ensures the best user experience, so it is very important to consider this when choosing a device. Video features of rivals in our comparison were rated 8 out of 10.
|HDR (High Dynamic Range)||HDR10||HDR10+|
|4K signal pass-through||4K/120Hz||4K/120Hz|
|8K signal pass-through||8K/60Hz||8K/60Hz|
|HDMI signal pass-through||✔||✔|
|3D signal pass-through||✔||✔|
|HDMI pass-through in standby mode||✔||✔|
|Analog to HDMI scaling||✖||✖|
|HDMI to HDMI scaling||✔||✔|
|Other video features||HLG, BT.2020, Dynamic HDR||Dynamic HDR, HLG, BT.2020|
In terms of evaluating additional features, both receivers received a score of 10 out of 10.
|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|
|Auto power off||✔||✔|
|Graphical user interface (GUI)||✔||✔|
|Firmware update||network, USB||network, USB|
|Other additional features||IP Control, Web Control, RS-232 Control, App Control||Web Control, App Control|
As the center of a home media system, each multichannel receiver has an additional set of terminals for connecting the second set of speakers to create additional audio space in Zone 2 or even Zone 3 where audio can have the separate source.
|Multi-room zones||2||has not|
|Zone audio output||speaker, preout||has not|
|Zone HDMI output||✔||has not|
|Multi-room control||HEOS App, Denon 2016 AVR Remote||HEOS App, Denon 2016 AVR Remote|
|Remote control input/output (IR)||1/1||0/0|
|DC trigger output (12V)||1||0|
For the ability to create multichannel surround sound, each of the receivers received 8 points out of 10.
IMAX Enhanced is a licensing and certification program under which home theater devices deliver crisp 4K HDR pictures and powerful sound as it was designed by the IMAX engineers. Only the AVR-X3700H licensed by IMAX.
|Dolby (other)||Dolby Digital Plus, Dolby Atmos Height Virtualization||Dolby Atmos Height Virtualization|
|DTS HD Master||✔||✔|
|DTS (other)||DTS-ES, DTS 96/24, DTS-HD, DTS-EXPRESS||DTS-ES, DTS 96/24, DTS-HD, DTS-EXPRESS|