Onkyo Network Stereo Receiver with Built-In Wi-Fi & Bluetooth TX8140 


(519) 746-8030

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 & 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.

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.

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.

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.


Weight 18.3 lbs. (8.3 kg)
Dimensions (W x H x D) 17 1/8" x 5 7/8" x 12 15/16" (435 x 149 x 328 mm)
Network Standby Power Consumption 2.9 W
No-Sound Power Consumption 50 W
Standby Power Consumption 0.2 W
Power Consumption 2.7 A
Power Supply AC 120 V~, 60 Hz
Tuner Section
FM/AM Preset Memory40 Stations (Plus 4 Faceplate BGM Presets)
AM 530 kHz?1,710 kHz
FM 87.5 MHz?107.9 MHz
Amplifier Section
Phono Overload (1 kHz) 70 mV (MM, 1 kHz, 0.5%)
S/N Ratio 106 dB (IHF-A, Line In, Speaker Out) 80 dB ( IHF-A, Phono In, Speaker Out)
Frequency Response 10 Hz-100 kHz (+ 1 dB, -3 dB) (Direct/Pure Audio Mode)
THD + Noise 0.08 % (20hz-20kHz, Half power)
Preset Station Naming Yes
RI-Compatible Remote Control Yes
IR Output Yes
IR InputYes
Sleep Timer Yes
Automatic/Manual TuningYes
Direct Access Tuning Yes
Number of AM/FM Presets 40
Quick Access BGM Presets Yes(x4)
USB Input Yes (Front)
Wireless Network Yes (Wi-Fi-Certified)
Supports Onkyo Remote App Yes(iPod Touch/iPod & Android-Powered Devices)
Hi-Res Streaming Audio Formats Yes(Apple Lossless, DSD 2.8/5.6 MHz, Dolby TrueHD, FLAC 192/24, LPCM, Ogg Vorbis, WAV, WMA)
Streaming Audio From PC / Network Yes(DLNA, Home Media)
Spotify Connect Support Yes
Internet Radio Capable Yes(Pandora, Spotify, Sirius, Slacker, Aupeo!, TuneIn)
Headphone Jack Yes
Subwoofer Pre-out Yes
Speaker A/+B Yes
Firmware Updates via Network/USB Yes/Yes
Auto Power On When Signal is Detected Yes(via Optical)
Digital Audio IN (Opt/Coax) 4/4
Phono Input Yes
Audio Input/Output 6 / 1
4 Ohm Capable Yes
6 Ohm CapableYes
Direct/Pure ModeYes/-
Non-Phase-Shift Amp Design Yes (for Realistic Sound Imaging)
384K/32 Bit DACs Yes (Asahi Kasei AKM4452)
Dynamic Power 190 W (3 Ohms, Front) 170 W (4 Ohms, Front) 110 W (8 Ohms, Front)
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

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