An overview of Onkyo TX-SR393 and Onkyo TX-RZ630 will help us understand the many features that the devices are equipped with. According to the results of our review, Onkyo TX-SR393 received 5.2 points out of 10 possible, and Onkyo TX-RZ630 was rated 7.8 points. The release date of TX-SR393 is 2019, and TX-RZ630 is 2018. And as a result of the review, it becomes clear that TX-SR393 is inferior in audio processing features to TX-RZ630.
For the built-in amplifier, the devices received different marks - 6 and 8, respectively, on a 10-point scale.
The number of channels is equal to the number of possible connected speakers. The Onkyo TX-SR393 supports 5.2-channels sound, but Onkyo TX-RZ630 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 TX-RZ630 this value is 90/8 W/Ohm, and for the TX-SR393 it is 80/8 W/Ohm.
|Stereo power (RMS), W/Ohm||80/8, 155/6||90/8, 215/6|
|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 TX-SR393 6 out of 10, and the TX-RZ630 - 9.
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 on the TX-RZ630.
Pure Direct mode feeds sound directly to the amplifier and bypasses any DSP processing. Only Onkyo TX-RZ630 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.
|Digital to analog converter (DAC)||AKM 384 KHz/32-bit||AK4458 384 KHz/32-bit|
|Pure direct (straight)||✖||✔|
|Auto speaker calibration||AccuEQ||AccuEQ|
|Speaker A/B switching||✖||✖|
|Other audio features||Advanced Music Optimizer, Hi-Res audio, CinemaFILTER||Advanced Music Optimizer, Theater-Dimensional, Hi-Res audio|
The connectivity of competitors in our comparison is markedly different, Onkyo TX-SR393 scored 6, and Onkyo TX-RZ630 scored 8 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 TX-RZ630 only.
|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|
|Other streaming services||has not||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, Onkyo TX-SR393 got 6 points, but Onkyo TX-RZ630 received 7 points.
Onkyo TX-SR393 is equipped with 4/1 HDMI inputs and outputs, and Onkyo TX-RZ630 has 7/2 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 TX-RZ630 has a Phono interface.
|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||1||2|
|Coaxial digital input||1||1|
|Phono (MM) input||✖||✔|
|Front panel connectors||phones, setup mic||HDMI, phones, setup mic, 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 rivals in our comparison were rated 7 out of 10.
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 only with Onkyo TX-SR393.
|HDR (High Dynamic Range)||HDR10||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||✔||✔|
|Analog to HDMI scaling||✖||✖|
|HDMI to HDMI scaling||✔||✖|
|Other video features||DeepColor, x.v.Color, HLG, BT.2020||BT.2020, HLG|
In terms of evaluating additional features, the TX-SR393 got 6 points, but the TX-RZ630 has 8.
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 TX-RZ630 can be controlled by voice via Google Assistant.
|Voice control||✖||Google Assistant|
|App control||Android||iPhone, iPad, iPod, Android|
|Tuner||AM, FM||AM, FM|
|Auto power off||✔||✖|
|Graphical user interface (GUI)||✔||✔|
|Firmware update||USB||network, USB|
|Other additional features||has not||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||speaker, preout|
|Zone HDMI output||✖||✔|
|Multi-room control||has not||Onkyo Controller app|
|Remote control input/output (IR)||0/0||1/0|
|DC trigger output (12V)||0||1|
For the ability to create multichannel surround sound, each of the receivers received 7 points out of 10.
|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-ES, DTS 96/24, DTS-HD, DTS-EXPRESS|