The Onkyo TX-8390 two-channel receiver features a 5mm thick extruded aluminum front panel and features a massive high-current power transformer, audio-specific capacitors, phase-shift-free amplifier circuitry that delivers wide frequency range, low distortion and a well-focused soundstage, and also a discrete transistor output stage. The model produces 200 W per channel at 6 ohms, has extensive switching capabilities and features support for a variety of wireless technologies.
The Onkyo TX-8390 is Onkyo’s first stereo receiver to feature AccuEQ acoustic calibration, originally designed for multi-channel AV receivers and now adapted for stereo models. AccuEQ creates a harmonious sound field in spaces of any size and shape. After determining the speaker sizes and distances from the measurement location and setting sound pressure levels, the system itself selects a crossover for the subwoofer and applies equalization. The resulting sound compares favorably to an acoustically treated listening environment.
The Onkyo TX-8390 features a state-of-the-art AK4458 DAC that supports 384 kHz/32-bit digital-to-analog conversion, followed by a VLSC filter that suppresses impulse noise and ultra-high frequency interference. Supports dual-band Wi-Fi for a more reliable connection, AirPlay and Bluetooth. With a wired connection via a LAN port over a local network, playback of Hi-Res formats stored on computers and servers on this network is available, such as PCM up to 24 bit/192 kHz and DSD up to 5.6 MHz (in PCM conversion mode). There is a built-in FM tuner with RDS, digital radio, web radio and various Internet services are supported. The Onkyo TX-8390 receiver works with Sonos, Chromecast built-in, DTS Play-Fi, AirPlay 2, FlareConnect, Spotify, Amazon Music, TIDAL, Deezer, TuneIn. The receiver includes voice control for audio playback using Google Assistant or Siri-enabled devices.
The built-in Chromecast streaming platform allows you to stream music via the app to a receiver, wireless speakers and other devices without using a cable. With the new software, the receiver will be able to support FireConnect, a technology specially developed for wireless installation that allows you to broadcast audio in fairly high quality from any source (including a vinyl player) without the use of wires to any room with a specialized speaker system installed there. At the same time, the proprietary Onkyo Controller application makes it possible to combine such speakers into groups and control music playback throughout the house. MQA codec support available. Despite the fact that in the case of the Onkyo TX-8390 we are dealing with a stereo receiver, it has an automatic calibration system AccuEQ.
The developers equipped the Onkyo TX-8270 with six HDMI inputs and two HDMI outputs (with support for a return channel, which is convenient when working in conjunction with a TV). All ports are version 2.0a and support HDCP 2.3, 4K video (60 Hz), 3D, HDR, Dolby Vision, DSD file transfer and other functions. There is upscaling from 1080p to 4K with HDMI resolution. The model has two USB ports for external storage devices, blocks of linear and digital inputs, an MM phono stage and two connectors for subwoofers. Four pairs of screw terminals are used to connect the speakers.
The receiver also has a Pre-Amp Mode and a Front Pre-Out output for an external power amplifier. They can also function as Zone 2 line outputs for distributed digital/analog audio, including HDMI and SPDIF, thanks to a separate Zone 2 DAC. Pure Audio mode disables all non-vital circuitry for interference-free audio authentic to the source.
Characteristics Onkyo TX-8390
Number of channels 2
Output power 200 W per channel (6 Ohm, 1 kHz, 1% THD, 1 channel loaded, IEC), 180 W per channel (6 Ohm, 1 kHz, 10% THD, 1 channel loaded , JEITA), 105 W per channel (8 Ohms, 20 Hz – 20 kHz, 0.08% THD, 2 channels driven, FTC)
Harmonic distortion 0.08% (20 Hz – 20 kHz, half power)
Frequency range 10 Hz – 100 kHz (+ 1 dB, – 3 dB, Direct mode)
Damping factor 54
Input sensitivity/impedance 200 mV/47 kΩ (line input), 3.5 mV/47 kΩ (MM phono stage)
Nominal output voltage/impedance 1 V/470 Ohm (subwoofer output)
LF: ± 10 dB (90 Hz), HF: ± 10 dB (7.5 kHz)
Signal-to-noise ratio 106 dB (line input), 80 dB (MM phono stage)
Speaker impedance 4–16/6-16 Ohm (A or B); 8 – 16 ohms (A + B)
Headphone output impedance 330 ohms
Built-in headphone amplifier power 80 mW (32 ohms, 1 kHz, 10%)
Wi-Fi IEEE 802.11 a/b/g/n, 2.4/5 GHz
Bluetooth version 4.1 + LE (A2DP v1.2, AVRCP v1.3)
AirPlay 2 support yes
Chromecast and DTS Play-Fi support yes
FireConnect wireless technology support for multiroom installation yes, 44.1 and 48 kHz sampling rates are supported
Direct mode disables tone control
Pure Audio mode disables the display and analog video circuits
Double Bass function yes
FM tuner yes
Number of presets 40
Display brightness adjustment yes
Asahi Kasei AK4458 DAC (32 bit/384 kHz)
VLSC filter suppresses impulse noise and interference in the UHF region
Protocol DLNA supported
Supported audio file formats over LAN with a wired connection MP3, WMA, WMA Lossless, FLAC (24 bit/192 kHz), WAV (24 bit/192 kHz), AAC, Apple Lossless (24 bit/96 kHz), AIFF ( 24 bit/192 kHz), DSD (5.6 MHz, PCM conversion), LPCM
USB audio file formats supported MQA, FLAC, WAV, ALAC, DSD, AIFF, WMA Lossless, MP3 and AAC
Internet services supported Sonos, Chromecast built-in, DTS Play-Fi, AirPlay 2, FlareConnect, Spotify, Amazon Music, TIDAL, Deezer, TuneIn
Control via Onkyo Controller app for iOS and Android devices yes
IP control when connected via LAN port supported
Number of additional zones 1
Inputs 6 x HDMI 2.0a (HDCP 2.3, 4K (60 Hz), 3D, HDR, Dolby Vision, etc.), 4 line RCA, MM phono input (RCA), 2 optical (24 bit/96 kHz), coaxial (24 bit/96 kHz), 2 x USB ports for external drives and for powering external devices (front panel: 5 V/1 A; rear panel: 5 V/500 mA), Ethernet port (LAN), mini- jack for calibration microphone
Outputs HDMI 2.0a (with ARC), 6.3 mm for headphones, Line Out (RCA) for zone 2, 2 Pre Out (RCA) for subwoofer
Other connections system bus RI connector, IR input, IR -output, 2 jacks for Bluetooth/Wi-Fi antennas, jack for FM/DAB antennas, ground terminal
Output terminals for speakers 4 pairs of screw terminals
Power supply powerful W-shaped transformer, audio-grade capacitors
Power consumption 340 W, standby : 0.15 W
Dimensions (WxHxD) 435x174x383 mm)
Weight 11.8 kg
