Pioneer VSX-LX303 vs Onkyo TX-NR646 review

Votes 1 1
Rating 5 5
Pioneer VSX-LX303
vs
Onkyo TX-NR646

The Pioneer VSX-LX303 vs Onkyo TX-NR646 comparison proves that these receivers have many common features.

Amplifier

A significant difference between the receivers in the number of channels, Pioneer VSX-LX303 has 9.2 versus 7.2 for Onkyo TX-NR646. Regarding power, then VSX-LX303 has such a W/Ohm ratio - 100/8 1KHz, 200/6 1KHz when TX-NR646 has a power of 160/6 1KHz. The THD is the same and is 0.08%.

Audio features

Characteristics of digital to analog converter (DAC) are different, AK4458 384 KHz/32-bit for VSX-LX303 and Hi-Grade 384 KHz/32-bit for the TX-NR646. Both the VSX-LX303 and the TX-NR646 support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay. Spotify can be used on each receiver. The VSX-LX303 can work with the audio stream from Deezer, TIDAL, Pandora, TuneIn Radio, and the TX-NR646 can receive a content from Deezer, TuneIn Radio. Compared AV receivers retain the quality of 4K 60p signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. The VSX-LX303 can scale the input HDMI signal, unlike the TX-NR646. Dolby Vision technology found support only on the VSX-LX303.

Extensive connections

The Pioneer VSX-LX303 has 7/2 HDMI inputs/outputs versus 8/2 HDMI connectors of the Onkyo TX-NR646.Pioneer VSX-LX303 connectionsOnkyo TX-NR646 connections The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. Both models support the standard HDCP 2.2. These compared receivers have a built-in phono stage for connecting a vinyl player.

Additional features

The VSX-LX303 supports 3 Multi-room zones, versus 2 for the TX-NR646. An ECO mode is only available for the TX-NR646. Both VSX-LX303 and TX-NR646 can be configured using the Setup assistant.

Multichannel surround

Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.

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Common

Product

Pioneer VSX-LX303
Onkyo TX-NR646

Model

VSX-LX303
TX-NR646

Brand

Pioneer
Onkyo

Reviews

208
414

Amplifier

Channels

9.2
7.2

Stereo power (RMS), W/Ohm

100/8 1KHz, 200/6 1KHz
160/6 1KHz

Output impedance, Ohm

8, 6
6

Frequency response

10Hz-100KHz
10Hz-100KHz

THD in stereo, %

0.08
0.08

Audio features

Digital to analog converter (DAC)

AK4458 384 KHz/32-bit
Hi-Grade 384 KHz/32-bit

Bi-amping

Pure direct (straight)

Auto speaker calibration

MCACC
AccuEQ

Speaker A/B switching

Connectivity

Wi-Fi

2.4/5GHz

USB

1 (USB 2.0)
1 (USB 2.0)

Bluetooth

Ethernet (RJ45)

1
1

Streaming services

Apple Music (AirPlay)

AirPlay
AirPlay

Google Play Music

Amazon Music

Spotify

Other streaming services

Deezer, TIDAL, Pandora, TuneIn Radio
Deezer, TuneIn Radio

Video features

HDR (High Dynamic Range)

HDR10

4K signal pass-through

4K 60p
4K 60p

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

Dolby Vision

Other video features

DeepColor, x.v.Color, HLG
DeepColor, x.v.Color

Additional features

Voice control

Google Assistant

App control

iPhone, iPad, iPod, Android
iPhone, iPad, iPod, Android

Display

colour OSD
fluorescent

Tuner

AM, FM
AM, FM

Sleep timer

Auto power off

ECO mode

Graphical user interface (GUI)

Setup assistant

Firmware update

network, USB
network, USB

Other additional features

IP Control
has not

Extensive connection

HDMI input/output

7/2
8/2

HDMI ARC (Audio Return Channel)

HDMI eARC (Enhanced Audio Return Channel)

HDMI CEC

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
2

Coaxial digital input

1
1

Composite input

2
3

Component input/output

1/0
2/0

Phono (MM) input

Front panel connectors

USB, HDMI, phones, setup mic, AUX
USB, HDMI, phones, setup mic, AUX

Multi channel preamp output

Multi-room

Multi-room zones

3
2

Zone audio output

speaker, preout
speaker, preout

Zone HDMI output

Multi-room control

FlareConnect
Onkyo Remote App

RS-232

1
0

Remote control input/output (IR)

1/1
1/0

DC trigger output (12V)

2
0

Multichannel surround

Dolby Atmos

Dolby TrueHD

Dolby Surround

DTS:X

DTS HD Master

DTS Virtual:X

Auro-3D

Power

Operational power consumption, W

750
630

Standby consumption, W

0.15
0.15

Removable power cord

User manual

Manual

Dimensions

Size W x H x D, cm/inches

43.5 x 17.3 x 37/17 x 6.8 x 14.6
43.5 x 17.3 x 33/17 x 6.8 x 13

Weight, kg/lbs

13.5/29.8
9.4/19.8
Pioneer VSX-LX303
Onkyo TX-NR646
Pioneer VSX-LX303
Onkyo TX-NR646

AV receivers SoundInspiration comparison rating

  • better
  • worse
  • 8.2
  • 7.4
  • 8.2Pioneer VSX-LX303
  • 7.4Onkyo TX-NR646

The Pioneer VSX-LX303 is better receiver in this comparison. Check Pioneer VSX-LX303 price

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