5.1-Channel A/V Receiver

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True Home Theater Sound On a Budget

Pay for the features you need and none that you don’t with the TX-SR373, a future-ready AV hub that delivers powerful reproduction of popular multichannel soundtracks, including DTS-HD Master Audio™ and Dolby® TrueHD, with surround calibration included. Discrete high-current amps love music: use Bluetooth® wireless technology to stream any music playing on your phone, tablet, or laptop in moments. The TX-SR373 allows you to connect your HDMI® equipped gear (DVD player, cable box/satellite TV receiver, streaming box, or game console) to the TV via one HDMI cable for a clutter-free installation. Easy to use and with heaps of muscle, the TX-SR373 is an affordable way to get theater sound at home.

Perfect Movie Soundtracks at Studio Resolution Image

Perfect Movie Soundtracks at Studio Resolution

The TX-SR373 is ready to decode Dolby® TrueHD and DTS-HD Master Audio™—the most popular lossless multichannel soundtrack formats common to Blu-ray Disc™. Experience authentic movie sound as the director intended.

HDMI Connects You to the Future Image

HDMI® Connects You to the Future

Connect your players with just one cable linking to the TV for clean AV unit installation. HDMI terminals pass the latest video formats to your display, including those supporting 4K/60 Hz, HDR, BT.2020, and HDCP 2.2. There’s also an Audio Return Channel (ARC) for amplifying TV broadcasts.

Amp Power Adds Thrills to Music, Movies, Gaming, and TV Programs Image

Amp Power Adds Thrills to Music, Movies, Gaming, and TV Programs

Discrete analog amps (not an all-in-one integrated circuit) deliver high instantaneous current to the speakers for dynamic audio reproduction. Controlled power is the cornerstone of Onkyo’s amplification philosophy.

AccuEQ Room Acoustic Calibration Image

AccuEQ Room Acoustic Calibration

AccuEQ sets essential speaker conditions such as distance, output, and crossover, and EQs for a clear and balanced audio image that’s free from distortion caused by the acoustics of your listening space.

Bluetooth Wireless Technology Image

Bluetooth® Wireless Technology

Bluetooth® wireless technology can stream whatever’s playing on your mobile device, laptop, or PC to the home theater. Use Onkyo-original Advanced Music Optimizer mode to enrich any compressed audio for a more satisfying musical experience.

(Streaming device not included)

Easy Connection Guide Simplifies Setup Image

Easy Connection Guide Simplifies Setup

Connections to speakers and external devices are clearly labeled and illustrated on the rear panel—the connection diagram is readable upside down to make things easy when you’re leaning over the top of the receiver.

Enjoy Music via USB Input

Connect a compatible USB memory device filled with MP3, WMA, or AAC audio files to enjoy clear and powerful reproduction of your music. Quality D/A conversion and a selection of DSP listening programs further enhance sound to suit different kinds of music.

Supplied Accessories


135 W per Channel

Dolby® TrueHD and DTS-HD Master Audio™ Decoding

HDMI® 4 In / 1 Out (HDCP 2.2 / HDR)

True Driving Power from Discrete Amp Circuits

AccuEQ Room Acoustic Calibration

Bluetooth® Wireless Technology

Easy-Setup Rear Panel


Bluetooth® Wireless Technology for Music Streaming from Supported Mobile and PC Apps

Advanced Music Optimizer Enhances Compressed Audio Quality

AccuEQ Room Acoustic Calibration Eliminates Standing Waves and Balances Surround-Sound Imaging

FM/RDS Tuner Features Station Information and Special Search Functions

HDMI Passthrough of the Latest Ultra HD Video Formats with HDR (High Dynamic Range) and HDCP 2.2 Content Protection


Five-Channel Analog Amplifiers

Discrete Output Stage Circuitry

High-Output Power Supply


HDMI Support for 4K/60 Hz, 3D, Audio Return Channel, DeepColor™, x.v.Color™, and LipSync

Dolby® TrueHD and DTS-HD Master Audio™ Decoding

192 kHz/24-bit Multichannel DAC

SACD Playback via HDMI (2.8 MHz, 2 Channels)

Direct Mode for Stereo Listening


4 HDMI Inputs and 1 Output with Audio Return Channel

USB Input for MP3/WMA/AAC Playback via USB Memory Devices

2 Composite Video Inputs and 1 Output

2 Digital Audio Inputs (1 Optical and 1 Coaxial)

3 Analog Audio Inputs

Subwoofer Pre-Out

Headphone Jack (Front)

Setup Mic Input (Front)


A/V Sync Control (Up to 500 ms in 5 ms Steps at 48 kHz)

HDMI Passthrough Function on Standby

Bluetooth® Standby Mode

Tone Control for Front L/R Channels (Bass/Treble)

3-Mode Display Dimmer (Normal/Dim/Dimmer)

FM/RDS and AM Tuners with 30 Random Presets

Simple Remote Control

Sleep Timer


Power Output: 135 W/Ch (6 Ohms, 1 kHz, 1% THD, 1 Channel Driven)

Frequency Response: 5 Hz–100 kHz/0 dB, -3 dB (Direct Mode)

Dimensions (W x H x D): 435 x 168 x 326.5 mm

Weight: 8.0 kg

Due to a policy of continuous product improvement, Onkyo reserves the right to change specifications and appearance without notice.

Availability of products in this website depends on region. Specifications and design are subject to change or differ by region without notice.

Product Information