Along with the growing popularity of custom home theater builds, the comparison of Denon AVR-X6400H and Pioneer VSX-LX504 takes place. According to the results of our review, Denon AVR-X6400H received 9.4 points out of 10 possible, and Pioneer VSX-LX504 was rated 8.8 points. The release date of AVR-X6400H is 2017, and VSX-LX504 is 2019. Based on the data on the characteristics and features of both models, we can conclude that AVR-X6400H has better performance than VSX-LX504.
For the built-in amplifier, the devices received different marks - 10 and 9, respectively, on a 10-point scale.
The number of channels is equal to the number of possible connected speakers. The Denon AVR-X6400H supports 11.2-channels sound, but Pioneer VSX-LX504 supports a 9.2-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-X6400H this value is 140/8 W/Ohm, and for the VSX-LX504 it is 120/8 W/Ohm.
|Stereo power (RMS), W/Ohm||140/8, 250/6||120/8, 230/6|
|Output impedance, Ohm||8, 6||8, 6|
|THD in stereo, %||0.05||0.08|
After reviewing the audio features of each model, we can rate the AVR-X6400H 10 out of 10, and the VSX-LX504 - 9.
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-X6400H can work with the main and additional set of speakers - and switch between them.
|Digital to analog converter (DAC)||AK4458 384 KHz/32-bit||AK4458 384 KHz/32-bit|
|Pure direct (straight)||✔||✔|
|Auto speaker calibration||Audyssey MultEQ XT32||MCACC|
|Speaker A/B switching||✔||✖|
|Other audio features||Audyssey Dynamic Volume, Audyssey Dynamic EQ, Audyssey LFC||Advanced Sound Retriever, Hi-Res audio|
The connectivity of competitors in our comparison is equal and was rated 8 out of 10.
Bluetooth connection is now one of the main communication protocols for the receiver's control or even music broadcasting.
|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, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud||Deezer, TIDAL, Pandora|
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-X6400H got 10 points, but Pioneer VSX-LX504 received 8 points.
Denon AVR-X6400H is equipped with 8/3 HDMI inputs and outputs, and Pioneer VSX-LX504 has 7/2 HDMI inputs and outputs.
HDMI eARC is the next step in the development of audio return channel technology, which works in conjunction with HDMI 2.1. Using eARC provides the highest sound quality for home audio systems. HDMI eARC is available only on Denon AVR-X6400H.
|HDMI ARC (Audio Return Channel)||✔||✔|
|HDMI eARC (Enhanced Audio Return Channel)||✔||✖|
|Digital content protection (HDCP)||HDCP 2.2||HDCP 2.2|
|Subwoofer output (LFE)||2||2|
|Headphone output||1 x 6.3||1 x 6.3|
|Optical digital input||2||1|
|Coaxial digital input||2||1|
|Phono (MM) input||✔||✔|
|Front panel connectors||USB, HDMI, phones, setup mic, AUX||USB, HDMI, 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 the AVR-X6400H were rated 9 out of 10 against the 10 for the VSX-LX504.
|HDR (High Dynamic Range)||✔||HDR10|
|4K signal pass-through||4K/60Hz||4K/60Hz|
|8K signal pass-through||✖||✖|
|HDMI signal pass-through||✔||✔|
|3D signal pass-through||✔||✔|
|HDMI pass-through in standby mode||✔||✔|
|Video conversion||analog to HDMI||analog to HDMI|
|Analog to HDMI scaling||✔||✔|
|HDMI to HDMI scaling||✔||✔|
|Other video features||HLG||x.v.Color, HLG, BT.2020|
In terms of evaluating additional features, the AVR-X6400H got 10 points, but the VSX-LX504 has 9.
Only the Denon AVR-X6400H has the ECO mode.
|Voice control||Amazon Alexa, Google Assistant, Siri, Josh.AI||Amazon Alexa|
|App control||iPhone, iPad, iPod, Android, Amazon Kindle||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||has not|
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.
|Zone audio output||speaker, preout||speaker, preout|
|Zone HDMI output||✔||✔|
|Multi-room control||HEOS App, Denon 2016 AVR Remote||Pioneer Control App, FlareConnect|
|Remote control input/output (IR)||1/1||1/1|
|DC trigger output (12V)||2||2|
Denon AVR-X6400H got 9 points for the multichannel surround sound and Pioneer VSX-LX504 got 8.
Auro 3D gives a bit more versatility than Dolby Atmos or DTS:X and provides a hemispherical sound and enables a receiver to produce 3D sound stages. Only the Denon AVR-X6400H has Auro-3D on its feature list.
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. The VSX-LX504 licensed by IMAX.
|Dolby (other)||Dolby Digital Plus||Dolby Digital Plus, Dolby Atmos Height Virtualization|
|DTS HD Master||✔||✔|
|DTS (other)||DTS-ES, DTS 96/24, DTS-EXPRESS, DTS Surround||DTS-ES, DTS 96/24, DTS-HD, DTS-EXPRESS|