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Onkyo  Audio    TX-8140 Wi-Fi , Blue Tooth Reciever

Delivering 80 W/Ch of high-current power from a fully discrete low-impedance amplification system, the TX-8140 plays all your audio sources with pure dynamic energy. Connectivity is outstanding: you can route TV sound via coaxial/optical inputs, stream music from mobile or PC over Wi-Fi®, play MP3s from flash drive via USB, or pair and stream audio from almost any application using Bluetooth technology.

Amplifier Section

Power Watts/Ch (8 Ohms 20-20kHz, 2 Channels Driven, FTC)

80, 0.08% THD

Power Watts/Ch (6 Ohms 1kHz, 1 Channel Driven, FTC)

110, 0.1% THD

Dynamic Power

190 W (3 Ohms, Front)
170 W (4 Ohms, Front)
110 W (8 Ohms, Front)

THD + Noise

0.08 % (20hz-20kHz, Half power)

Frequency Response

10 Hz-100 kHz (+ 1 dB, -3 dB)
(Direct Mode)

S/N Ratio

106 dB (IHF-A, Line In, Speaker Out)
80 dB ( IHF-A, Phono In, Speaker Out)

Phono Overload (1 kHz)

70 mV (MM, 1 kHz, 0.5%)

Tuner Section


87.5 MHz–107.9 MHz


530 kHz–1,710 kHz

FM/AM Preset Memory

40 Stations (Plus 4 Faceplate BGM Presets)


Power Supply

AC 120 V˜, 60 Hz

Power Consumption

2.7 A

Standby Power Consumption

0.2 W

No-Sound Power Consumption

50 W

Network Standby Power Consumption

2.9 W

Dimensions (W x H x D)

17 1/8" x 5 7/8" x 12 15/16" (435 x 149 x 328 mm)


18.3 lbs. (8.3 kg)



Power Watts/Ch (6 Ohms 1kHz, 1 Channel Driven, FTC)

110, 0.1% THD

Power Watts/Ch (8 Ohms 20-20kHz, 2 Channels Driven, FTC)

80, 0.08% THD

Dynamic Power

190 W (3 Ohms, Front)
170 W (4 Ohms, Front)
110 W (8 Ohms, Front)

WRAT (Wide Range Amplifier Technology)


H.C.P.S. (High Current Power Supply)


Non-Phase-Shift Amp Design

✓ (for Realistic Sound Imaging)

6 Ohm Capable

4 Ohm Capable

Direct/Pure Mode


384K/32 Bit DACs

✓ (Asahi Kasei AKM4452)

192K/24 Bit DACs



Audio Input/Output


Phono Input

Digital Audio IN (Opt/Coax)


Auto Power On When Signal is Detected

✓ (via Optical)

Zone 2 Line Out


Zone 2 Digital to Analog Audio Conversion


Speaker A/+B

Subwoofer Pre-out

Headphone Jack

Network / USB

Internet Radio Capable

✓ (TuneIn Radio, Pandora, Slacker, SiriusXM Internet Radio, Spotify, and Deezer)

Spotify Connect Support

Streaming Audio From PC / Network

✓ (DLNA, Home Media)

Hi-Res Streaming Audio Formats

✓ (Apple Lossless, DSD 2.8/5.6 MHz, Dolby TrueHD, FLAC 192/24, LPCM, Ogg Vorbis, WAV, WMA)

Supports Onkyo Remote App

✓ (iPod Touch/iPod & Android-Powered Devices)

Wireless Network

✓ (Wi-Fi Certified)

USB Input

✓ (Front)



Firmware Updates via Network/USB



Quick Access BGM Presets

✓ (x4)

Number of AM/FM Presets


Preset Station Naming

Direct Access Tuning

Automatic/Manual Tuning

Sleep Timer

IR Input

IR Output

RI-Compatible Remote Control



Realistic & Clean Audio

High current enables masterful control of the speakers for extremely accurate and dynamic sound. It's the cornerstone of our Wide Range Amplification Technology system, and it creates an uncommonly well-focused and realistic audio image. 

The TX-8140 delivers superb stereo power at 80 W/Ch (8 Ohms, 20 Hz-20 kHz, 0.1%, 2 Channels Driven, FTC) 110 W/Ch (6 Ohms, 1 kHz, 0.1%, 1 Channel Driven, FTC).

Bluetooth / Wi-Fi® with Pandora and Spotify

The TX-8140 has Wi-Fi and Bluetooth technologies built in. The free Onkyo Remote app puts a range of streaming options at your fingertips, from universal hi-res audio via network-attached devices to internet streaming services to music on your smartphone and tablet. Or pair up and enjoy whatever's playing on your Bluetooth-compatible device for huge cinematic sound. 

It also comes loaded with Spotify, Pandora, SiriusXM Internet Radio, Slacker and TuneIn. You can select a station and search for music available on these services via the Onkyo Remote app on your phone. You'll never be short of your favorite music to enjoy.

Great Sound From Any Format

An Asahi Kasei AK4452 digital-to-analog converter unlocks the full potential of any audio format with its unique low-distortion sound-enhancing filtering technologies.

Hi-Res Clarity & Detail

The TX-8140 is engineered for universal Hi-Res compatibility and ease of use. Use the remote app to select your 192/24 or 5.6 MHz DSD files on PC or NAS and bask in the clarity and detail of high-resolution music.

Quick Access Presets

Get instant access to four of your favorite FM/AM or internet radio stations at the touch of a button. Four preset buttons on the faceplate go straight to the stations. You can even wake up the receiver from standby mode by pressing one of these buttons for instant radio. 


Rediscover the Magic of Vinyl

Hi-current amplification brings out the best in your vinyl records. Just connect your turntable to the phono input. The TX-8140 will faithfully reproduce vinyl's authentic stereo sound.