Onkyo TX-NR737 770W 7.2 Atmos 4K Wi-Fi Bluetooth THX AVR

Onkyo TX-NR737 770W 7.2 Atmos 4K Wi-Fi Bluetooth THX AVR

A very-good-condition Onkyo TX-NR737 — a 7.2-channel network AV receiver with Dolby Atmos, THX Select2 Plus certification, full 4K/60 Hz HDMI with HDCP 2.2, built-in Wi-Fi, Bluetooth, AirPlay, and Onkyo’s well-regarded Three-Stage Inverted Darlington amplifier topology — complete with the original factory box, original Onkyo remote, original AccuEQ setup microphone, and AM / FM antennas.

The TX-NR737 sits in the upper-mid tier of Onkyo’s 2014 AVR lineup and is one of the more capable and feature-complete receivers ever offered at its price point. Onkyo built the TX-NR737 around a high-current massive transformer, discrete Three-Stage Inverted Darlington output stages on every channel, and the company’s WRAT (Wide Range Amplifier Technology) platform — a genuinely robust amplifier section that delivers 110 watts per channel into 8 ohms (20 Hz – 20 kHz, two channels driven) and 125 watts per channel into 6 ohms, with healthy dynamic power into low-impedance loads (250 W into 3 Ω front). THX Select2 Plus certification confirms the receiver’s ability to deliver reference-level performance in rooms up to 2,000 cubic feet — meaningful third-party validation that very few AVRs at this price tier have ever earned.

Modern format support is comprehensive and remains entirely relevant in 2026: full Dolby Atmos decoding (5.1.2 from the receiver’s seven amplified channels), Dolby TrueHD, DTS-HD Master Audio, 4K/60 Hz HDMI pass-through with HDCP 2.2 on the main inputs, Marvell Qdeo 4K video upscaling for older DVD and HD sources, and 3D pass-through. The HDCP 2.2 support in particular keeps this receiver fully compatible with modern 4K streaming devices, 4K Blu-ray players, and current-generation game consoles — a critical distinction from the previous Pioneer SC-1227-K listing earlier in the week, and a significant practical advantage for any buyer running a modern 4K display.

Network and streaming features are extensive: built-in dual-band Wi-Fi, Bluetooth, AirPlay, DLNA 1.5, Spotify, Pandora, Tidal, TuneIn, internet radio, and a front-panel USB input. Hi-resolution audio playback is supported up to 192 kHz / 24-bit PCM and 5.6 MHz DSD over network. AccuEQ automatic room correction (microphone included) calibrates the system in minutes, and the receiver supports powered Zone 2 plus a Zone 2/3 line-out for distributed audio playback. A phono input is included for direct turntable connection — a feature that has become increasingly rare on modern AVRs and that meaningfully expands the system’s flexibility.

Connectivity is generous: 7 HDMI inputs (1 front-panel) and 2 HDMI outputs, 4K/60 Hz capable with HDCP 2.2; multiple coaxial and optical digital inputs; full legacy analogue inputs including phono; 7.2-channel preamp outputs for use with an external power amplifier; and colour-coded banana-plug-compatible speaker binding posts on every channel.

The accessory package on this particular unit is genuinely complete — original factory box, original Onkyo remote, AccuEQ setup microphone, AM loop antenna, FM antenna, antenna isolator, colour labels for speaker cables, and instruction manual. The complete-with-box-and-mic configuration is genuinely uncommon on the used market and is one of the strongest single value-adds a used AVR can have, both for the buyer who wants a clean, complete unit and for any future resale.

This particular unit is in very-good cosmetic condition, presenting cleanly with the typical light handling marks consistent with careful use and no significant blemishes to the front panel, top, or sides.

A note on long-term reliability: this generation of Onkyo AVRs (2013–2015) had some reported HDMI-board failures across the broader product family. This particular unit is fully functional at the time of listing, all HDMI inputs and outputs have been bench-tested, and the receiver is ready for immediate deployment in a modern 4K Atmos surround system. The Radique 90-day warranty applies as it does to every component we sell.

Product highlights:

7.2-channel network AV receiver with Dolby Atmos (5.1.2 from internal channels)

THX Select2 Plus certified

110 W/ch into 8 Ω (20 Hz – 20 kHz, 2 channels driven) — 770 W total

125 W/ch into 6 Ω (1 kHz, 1 channel driven, 1% THD)

WRAT amplifier with discrete Three-Stage Inverted Darlington output stages

High-current massive transformer

7 HDMI in / 2 HDMI out, full 4K/60 Hz with HDCP 2.2

Marvell Qdeo 4K video upscaling

Built-in Wi-Fi, Bluetooth, AirPlay, DLNA 1.5

Hi-res audio: 192 kHz / 24-bit PCM, 5.6 MHz DSD

AccuEQ automatic room correction (microphone included)

Phono (MM) input for turntable

Powered Zone 2, Zone 2/3 line-out

7.2-channel pre-out for external power amp

Banana-plug-compatible binding posts

Original factory box, remote, setup microphone, antennas, manual

Specifications:

Channels: 7.2

Continuous power output: 110 W/ch (8 Ω, 20 Hz – 20 kHz, 2 channels driven, 0.08% THD)

Continuous power output: 125 W/ch (6 Ω, 1 kHz, 1 channel driven, 1% THD)

Dynamic power: 250 W (3 Ω), 220 W (4 Ω), 130 W (8 Ω)

THD+N: 0.08% (20 Hz – 20 kHz, half power)

Frequency response: 5 Hz – 100 kHz (+1 dB / –3 dB, Direct mode)

Signal-to-noise ratio: 106 dB (line, IHF-A); 80 dB (phono MM)

Speaker impedance: 4 Ω – 16 Ω

HDMI: 7 in / 2 out, 4K/60 Hz, HDCP 2.2

Network: Wi-Fi (dual-band), Ethernet, Bluetooth, AirPlay, DLNA 1.5

Surround formats: Dolby Atmos, Dolby TrueHD, DTS-HD MA, DTS:Neo:X

Room correction: AccuEQ (microphone included)

Year of release: 2014

Condition: Very Good

Dimensions (W x H x D): 17.1 x 6.9 x 14.9 inches (435 x 175 x 379 mm)

Weight: 25.4 lbs (11.5 kg)

A very-good-condition Onkyo TX-NR737 7.2-channel Dolby Atmos network AV receiver, complete with original box, original remote, AccuEQ setup microphone, and antennas — a genuinely powerful, THX-certified, fully 4K-capable surround processor / amplifier that remains a strong performer for modern movie and music duty.

Backed by Radique Audio’s 90-day warranty and our perpetual trade-back policy, you can purchase with confidence.