Review of Onkyo TX-SR494 versus Yamaha RX-V4A will reveal the best features offered by the devices. According to the results of our review, Onkyo TX-SR494 received 5.5 points out of 10 possible, and Yamaha RX-V4A was rated 6.5 points. The release date of TX-SR494 is 2019, and RX-V4A is 2020. RX-V4A is better suited for home theater use than the TX-SR494. Its sound profile is better balanced.
For the built-in amplifier, the devices received different marks - 7 and 6, respectively, on a 10-point scale.
The number of channels is equal to the number of possible connected speakers. The Onkyo TX-SR494 supports 7.2-channels sound, but Yamaha RX-V4A 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 TX-SR494 this value is 135/6 W/Ohm, and for the RX-V4A it is 80/6 W/Ohm.
|Stereo power (RMS), W/Ohm||135/6||80/6|
|Output impedance, Ohm||6||6|
|THD in stereo, %||0.08||0.06|
After reviewing the audio features of each model, we can rate the TX-SR494 9 out of 10, and the RX-V4A - 7.
|Digital to analog converter (DAC)||AKM 384 KHz/32-bit||N/A|
|Pure direct (straight)||✔||✔|
|Auto speaker calibration||AccuEQ||YPAO|
|Speaker A/B switching||✖||✖|
|Other audio features||Advanced Music Optimizer, Hi-Res audio||CINEMA DSP, Compressed Music Enhancer, Virtual CINEMA FRONT|
The connectivity of competitors in our comparison is markedly different, Onkyo TX-SR494 scored 5, and Yamaha RX-V4A scored 9 out of 10.
Bluetooth connection is now one of the main communication protocols for the receiver's control or even music broadcasting.
Wired internet connection via RJ45 allows receiver faster connection than wireless or even use NAS storages. Wired connection via RJ45 is possible in the RX-V4A only.
|USB||1 (USB 2.0)||1 (USB 2.0)|
|Apple Music (AirPlay)||✖||AirPlay, AirPlay 2|
|Other streaming services||has not||Deezer, TIDAL, Pandora, SiriusXM, Qobuz|
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, Onkyo TX-SR494 got 6 points, but Yamaha RX-V4A received 5 points.
Competitors in our review have 4/1 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 on Yamaha RX-V4A.
The HDCP encryption protocol is now mandatory for most media devices. This security technology encrypts digital signals from one product to another. HDCP content-encryption protocol is present on Onkyo TX-SR494 in the HDCP 2.2 version, and Yamaha RX-V4A has the HDCP 2.3 version.
|HDMI ARC (Audio Return Channel)||✔||✔|
|HDMI eARC (Enhanced Audio Return Channel)||✖||✔|
|Digital content protection (HDCP)||HDCP 2.2||HDCP 2.3|
|Subwoofer output (LFE)||2||0|
|Headphone output||1 x 6.3||1 x 6.3|
|Optical digital input||1||1|
|Coaxial digital input||1||1|
|Phono (MM) input||✖||✖|
|Front panel connectors||USB, phones||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 the TX-SR494 were rated 6 out of 10 against the 7 for the RX-V4A.
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 TX-SR494 works with the 4K/60Hz video, and the RX-V4A has the 4K/120Hz.
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 on Yamaha RX-V4A.
Most of the AV receivers have a video scaling function, it is the process of reformatting the video signal to a higher resolution without losing the quality of the image. Upscaling the video signal resolution is possible with Yamaha RX-V4A.
|HDR (High Dynamic Range)||HDR10||HDR10|
|4K signal pass-through||4K/60Hz||4K/120Hz|
|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||DeepColor, x.v.Color, HLG, BT.2020||x.v.Color, HLG, BT.2020|
In terms of evaluating additional features, the TX-SR494 got 6 points, but the RX-V4A has 7.
Voice control allows you to control the basic functions of the receiver through a smartphone, smart speaker or using the microphone that comes with the kit. The RX-V4A can be controlled by voice via Amazon Alexa, Google Assistant, Siri. Yamaha RX-V4A has the ECO mode.
|Voice control||✖||Amazon Alexa, Google Assistant, Siri|
|App control||iPhone, iPad, iPod, Android||iPhone, iPad, iPod, Android|
|Auto power off||✔||✔|
|Graphical user interface (GUI)||✔||N/A|
|Firmware update||USB||network, USB|
|Other additional features||has not||App Control|
|Multi-room zones||2||has not|
|Zone audio output||speaker||has not|
|Zone HDMI output||✖||has not|
|Multi-room control||has not||MusicCast|
|Remote control input/output (IR)||0/0||0/0|
|DC trigger output (12V)||0||0|
Onkyo TX-SR494 got 7 points for the multichannel surround sound and Yamaha RX-V4A 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. Onkyo TX-SR494 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 TX-SR494.
|Dolby (other)||Dolby Digital Plus, Dolby Atmos Height Virtualization||Dolby Digital Plus|
|DTS HD Master||✔||✔|
|DTS (other)||DTS-ES, DTS 96/24, DTS-HD, DTS-EXPRESS||DTS 96/24, DTS-HD, DTS-EXPRESS|