An overview of Yamaha RX-A4A and Yamaha RX-V485 will help us understand the many features that the devices are equipped with. According to the results of our review, Yamaha RX-A4A received 8.7 points out of 10 possible, and Yamaha RX-V485 was rated 7.4 points. The release date of RX-A4A is 2021, and RX-V485 is 2018. And as a result of the review, it becomes clear that RX-V485 is inferior in audio processing features to RX-A4A.
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 Yamaha RX-A4A supports 7.2-channels sound, but Yamaha RX-V485 supports a 5.1-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 RX-A4A this value is 110/8 W/Ohm, and for the RX-V485 it is 80/8 W/Ohm.
|Stereo power (RMS), W/Ohm||110/8||80/8, 145/6|
|Output impedance, Ohm||8||8, 6|
|THD in stereo, %||0.06||0.09|
The score for audio features is 9 of 10 for both receivers.
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.
|Digital to analog converter (DAC)||384 KHz/32-bit||Burr-Brown 384 KHz/32-bit|
|Pure direct (straight)||✔||✔|
|Auto speaker calibration||YPAO||YPAO|
|Speaker A/B switching||✖||✖|
|Other audio features||CINEMA DSP 3D, Compressed Music Enhancer, Virtual CINEMA FRONT||CINEMA DSP 3D, Compressed Music Enhancer, Virtual CINEMA FRONT|
The connectivity of competitors in our comparison is markedly different, Yamaha RX-A4A scored 9, and Yamaha RX-V485 scored 7 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, SiriusXM, Napster, SoundCloud||Deezer, TIDAL, Pandora, Napster, SiriusXM|
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, both receivers got 8 points on our 10-point scale.
Yamaha RX-A4A is equipped with 7/3 HDMI inputs and outputs, and Yamaha RX-V485 has 4/1 HDMI inputs and outputs.
Connecting a vinyl player or phonograph is possible using a Phono input which is represented by mini-jack or RCA connectors. Only the RX-A4A has a Phono interface.
|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||1|
|Headphone output||1 x 6.3||1 x 6.3|
|Optical digital input||2||1|
|Coaxial digital input||1||2|
|Phono (MM) input||✔||✖|
|Front panel connectors||USB, phones, setup mic||USB, phones, AUX|
|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 RX-A4A were rated 8 out of 10 against the 9 for the RX-V485.
With the 4K pass-through feature, the AV receiver sends "native" 4K signals to a 4K TV from a video source without any processing. The RX-A4A works with the 4K/120Hz video, and the RX-V485 has the 4K/60Hz.
The AV receiver passes "native" 8K signals from a video source to 8K TV without any encoding, with the 8k pass-through features. The 8K path-through is available only on Yamaha RX-A4A.
|HDR (High Dynamic Range)||HDR10+||HDR10|
|4K signal pass-through||4K/120Hz||4K/60Hz|
|8K signal pass-through||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||x.v.Color, HLG, BT.2020, LipSync||DeepColor, x.v.Color, BT.2020, HLG|
In terms of evaluating additional features, the RX-A4A got 10 points, but the RX-V485 has 9.
|Voice control||Amazon Alexa, Google Assistant, Siri, Josh.AI||Amazon Alexa, Google Assistant, Siri|
|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||Web Control, App 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||preout||speaker|
|Zone HDMI output||✔||✖|
|Remote control input/output (IR)||1/1||0/0|
|DC trigger output (12V)||2||0|
Yamaha RX-A4A got 7 points for the multichannel surround sound and Yamaha RX-V485 got 5.
Dolby Atmos' particularity is that this is the object-oriented sound format, that is, each audio signal object is independently sounded and connected to its spatial position. Yamaha RX-A4A can create 3D sound due to the Dolby Atmos support.
DTS:X is an algorithm used by the processor to create sound scenes, where sounds connected directly to objects rather than channels, and to determine the optimum sound output distribution in space. Surround sound with DTS:X is available only on the RX-A4A.
|Dolby (other)||Dolby Digital Plus, Dolby Atmos Height Virtualization||Dolby Digital Plus, Dolby Pro Logic|
|DTS HD Master||✔||✔|
|DTS (other)||DTS-ES, DTS-HD||DTS-ES, DTS 96/24, DTS-HD, DTS-EXPRESS, DTS Neo:6|