TX-NR818  
7.2-Channel Network A/V Receiver
 SPECIFICATIONS
  Center   135 W (8 Ohms, 20 Hz–20 kHz, 
    0.08% THD, 2 Channels Driven, FTC) 
    145 W (8 Ohms, 1 kHz, 0.7% THD, 
    2 Channels Driven, FTC) 
    160 W (6 Ohms, 1 kHz, 0.1% THD, 
    2 Channels Driven, FTC) 
  Surround L/R  135 W/Ch (8 Ohms, 20 Hz–20 kHz, 
    0.08% THD, 2 Channels Driven, FTC) 
    145 W/Ch (8 Ohms, 1 kHz, 0.7% THD, 
    2 Channels Driven, FTC) 
    160 W/Ch (6 Ohms, 1 kHz, 0.1% THD, 
    2 Channels Driven, FTC) 
  Surround Back L/R, Front High/Wide L/R, or Zone 2/3 L/R 
    135 W/Ch (8 Ohms, 20 Hz–20 kHz, 
    0.08% THD, 2 Channels Driven, FTC) 
    145 W/Ch (8 Ohms, 1 kHz, 0.7% THD, 
    2 Channels Driven), FTC 
    160 W/Ch (6 Ohms, 1 kHz, 0.1% THD, 
    2 Channels Driven, FTC) 
Dynamic Power  300 W (3 Ohms, Front) 
    250 W (4 Ohms, Front) 
    150 W (8 Ohms, Front)
THD+N (Total Harmonic Distortion + Noise) 
  0.08% (20 Hz–20 kHz, Rated Power)
Damping Factor  60 (Front, 1 kHz, 8 Ohms)
Input Sensitivity and Impedance  
    200 mV/47 k-ohms (Line) 
    2.5 mV/47 k-ohms (Phono MM)
Rated RCA Output Level and Impedance 
  200 mV/470 Ohms (Line Out)
Maximum RCA Output Level and Impedance 
    4.6 V/470 Ohms (Line Out)
Phono Overload  70 mV (MM, 1 kHz, 0.5%)
Frequency Response  5 Hz–100 kHz/+1 dB, -3 dB (DSP Bypass)
Tone Control  ±10 dB, 50 Hz (Bass) 
    ±10 dB, 20 kHz (Treble)
Signal-to-Noise Ratio  110 dB (Line, IHF-A) 
    80 dB (Phono MM, IHF-A)
Speaker Impedance  4 Ohms–16 Ohms or 6 Ohms–16 Ohms
Video Section
Input Sensitivity/Output Level and Impedance  
  Video  1.0 Vp–p/75 Ohms (Component Y)   
 
0.7 Vp–p/75 Ohms (Component P
B
/C
B
, P
R
/C
R
) 
    1.0 Vp–p/75 Ohms (Composite)
Component Video Frequency Response 
    5 Hz–100 MHz/+0 dB, -3 dB
Tuner Section
Tuning Frequency Range  
  FM  87.5 MHz–107.9 MHz 
  AM  530 kHz–1,710 kHz
FM/AM Preset Memory   40 Stations
General
Power Supply   AC 120 V~, 60 Hz 
Power Consumption   8.1 A  
Standby Power Consumption 
   0.1 W 
Dimensions (W x H x D) 17 
1
/
8
˝ x 7 
13
/
16
˝ x 17 
1
/
8
˝  
    (435 x 198.5 x 435.5 mm)  
Weight  40.3 lbs. (18.3 kg)  
CARTON
Dimensions (W x H x D) 23 
1
/
8
˝ x 13 
1
/
4
˝ x 21 
3
/
4
˝  
    (587 x 337 x 553 mm)  
Weight  48.5 lbs. (22.0 kg)  
UPC CODE
(B)    751398010545  
Supplied Accessories
• Indoor FM Antenna  • AM Loop Antenna  • Speaker Cable Labels   
• Speaker Set-Up Microphone  • Instruction Manual   
• Quick Start Guide  • Remote Controller  • AA (R6) Batteries x 2
Amplier Section
Power Output    
  Front L/R  135 W/Ch (8 Ohms, 20 Hz–20 kHz, 
    0.08% THD, 2 Channels Driven, FTC) 
    145 W/Ch (8 Ohms, 1 kHz, 0.7% THD, 
    2 Channels Driven, FTC) 
    160 W/Ch (6 Ohms, 1 kHz, 0.1% THD, 
    2 Channels Driven, FTC) 
Due to a policy of continuous product improvement, Onkyo reserves the right to change specications and appearance without notice. THX Select2 Plus is a trademark of THX Ltd. THX may be registered in some jurisdictions. All rights reserved. Manufactured under license from 
Dolby Laboratories. Dolby, Pro Logic, and the double-D symbol are trademarks of Dolby Laboratories. DTS, DTS-HD, the Symbol, & DTS or DTS-HD and the Symbol together are registered trademarks of DTS, Inc. © DTS, Inc. All rights reserved. Manufactured under license from 
Audyssey Laboratories, Inc. U.S. and foreign patents pending. Audyssey MultEQ XT32, Audyssey Dynamic EQ, Audyssey Dynamic Volume, and Audyssey DSX are registered trademarks of Audyssey Laboratories, Inc. HDMI, the HDMI logo, and High-Denition Multimedia Interface are 
trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries. iPhone, iPod, iPod classic, iPod nano, iPod shufe, and iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries. "Made for iPod" and "Made for iPhone" mean 
that an electronic device has been designed to connect specically to iPod or iPhone, respectively, and has been certied by the developer to meet Apple performance standards. Apple is not responsible for the operation of this device or its compliance with safety and regulatory 
standards. Please note that the use of this device with iPod or iPhone may affect wireless performance. Android is a trademark of Google Inc. InstaPrevue and the InstaPrevue logo are trademarks or registered trademarks of Silicon Image, Inc. in the United States and other countries. 
MHL, the MHL Logo, and Mobile High-Denition Link are trademarks or registered trademarks of MHL LLC in the United States and other counties. x.v.Color is a trademark of Sony Corporation. Windows 7 and the Windows logo are trademarks or registered trademarks of Microsoft 
Corporation in the United States and/or other countries. Qdeo and QuietVideo are trademarks of Marvell or its afliates. HQV, StreamClean, and Auto HQV are trademarks or registered trademarks of Integrated Device Technology, Inc. SIRIUS, XM and all related marks and logos are 
trademarks of SIRIUS XM Radio Inc. and its subsidiaries. WRAT, Music Optimizer, and Theater-Dimensional are trademarks of Onkyo Corporation. All other trademarks and registered trademarks are the property of their respective holders.
NPR No. 12N22  02/12
Wireless Cloud Streaming, Internet Radio, and  
PC-Based Music
Connecting to your home network using a standard LAN 
cable, the TX-NR818 makes streaming audio and internet 
radio easy. You can also play formats including MP3, AAC, 
Apple Lossless, FLAC, and WMA Lossless stored on your 
PC through your Onkyo home theater system. The receiver 
offers easy access to internet radio channels from Pandora
®
, 
Slacker
™
, SIRIUS XM Internet Radio
®
, Last.fm, and vTuner, 
plus cloud-based music streaming from Rhapsody, MP3tunes, 
Spotify, and AUPEO!*. Wireless networking is enabled with 
an optional UWF-1 Wireless LAN Adapter.
*Availability of services depends on region. Some services may require a rmware 
update.
Mobile High-Denition Link for Smart Phone 
Movies and Photos
The TX-NR818’s front-panel HDMI port is designed for the 
connection of compatible smart phones and other portable 
electronic devices using the new MHL
™
 standard. MHL 
allows you to display full 1080p video and still images on 
your HDTV with up to 7.1 channels of surround sound. Use 
the receiver’s remote to control playback from your phone 
as it receives a handy recharge.
InstaPrevue
™
 Technology Makes Switching  
Sources Easy
The TX-NR818 incorporates InstaPrevue visual port 
management technology, making input source selection 
easier. InstaPrevue technology provides a live video thumbnail 
of the available content on your devices connected via 
HDMI. You no longer have to remember that your gaming 
console is connected to Port 3, or your Blu-ray player to 
Port 1, for example—you can see what’s playing and choose 
accordingly.
THX
®
 Select2 Plus
™
 Certied 
THX Select2 Plus certication is specied for rooms where 
the screen-to-seat viewing distance is 10 to 12 feet and the 
room volume is around 2000 cubic feet. To achieve THX 
Select2 Plus certication, the TX-NR818 had to meet the 
world’s most demanding standards for home theater audio 
quality and performance, and play at reference volume levels 
with minimal distortion.
World’s Best Video Processing
Three of the best video processing and enhancement 
systems are included to guarantee smooth and accurate 
images on your HDTV.
HQV
®
 Vida
™
 VHD1900   
The Vida VHD1900 upscales analog content to 1080p, and enhances 
native high-denition sources. The chip employs multi-cadence 
tracking, expanded 12-bit color processing, and four-eld motion-
adaptive de-interlacing. Auto HQV
™
 enhances the incoming image, 
while HQV StreamClean
™
 cleans up video from lower-quality online 
sources by eliminating mosquito and block noise.
Marvell Qdeo
™
 Technology 
Qdeo technology upscales 1080p sources to 4K (4096 x 2160)—
even content already upscaled from lower resolutions by the HQV 
Vida processor. Played back on a compatible 4K display, your  
high-denition content will look more cinematic than ever.
ISF Video  Calibration 
ISF (Imaging Science Foundation) video calibration dramatically 
improves picture quality. Each video input source is independently 
calibrated to achieve the best possible performance from your 
connected HDTV.
Note: 4K video playback requires a 4K-compatible TV. HDMI pass-through of 4K 
content from source devices is not supported. 4K upscaling of analog video is only 
available at 480i.
Onkyo Remote Apps for iPod touch
®
/iPhone
®
 and 
Android Phone
The Onkyo Remote App 2 for iPod touch/iPhone*
1
 and 
Onkyo Remote for Android phone*
2
 both provide an 
intuitive way to operate Onkyo network A/V receivers. 
Control input sources, adjust settings, and play audio stored 
in a smart phone wirelessly (Android phone only) using the 
application’s interactive graphical display. The two Remote 
Apps are available separately as free downloads.
*1 Compatible with iPod touch (3rd generation or later) and iPhone 3GS or later. All 
models require iOS 4.2 or later. *2 Requires Android OS 2.1 or later.
Three High Performance Sound Expansion Systems 
A seven-channel system provides a more immersive 
entertainment experience, with additional High or Wide 
channels convincing you with realistic directional and 
ambient effects. Audyssey DSX
®
, Dolby
®
 Pro Logic
®
 IIz, 
and DTS Neo:X
™
 expansion systems offer you freedom to 
choose your preferred speaker setup. Audyssey DSX can 
expand 5.1 sources to incorporate Wide or Height channels. 
The Dolby system adds Height channels and stereo source 
expansion, while DTS Neo:X offers Wides or Heights with 
cinema, music, or game listening modes. 
Audyssey MultEQ XT32 
Audyssey’s top-of-the-line room correction suite equalizes 
the sound to suit the unique acoustics of your listening 
space. High-resolution lters are applied to all channels—
including subwoofers—based on information collected from 
more than 10,000 individual control points across eight 
measurement positions.
Innovative Design and Quality Construction 
This receiver is built to deliver superb sound quality. 
Processing equipment and amplier circuits are housed 
separately to limit electrical interference, while PLL (Phase 
Locked Loop) jitter cleaning preserves signal integrity by 
eliminating digital clock noise. The amplier’s three-stage 
inverted Darlington circuitry—an enhancement to the core 
WRAT (Wide Range Amplier Technology) concept—
ensures minimal distortion, and better manages impedance 
uctuations. Quality circuitry dovetails with a heavy-duty 
power supply for instantaneous response to signal gains. The 
resulting sound is reliably pure, even under heavy loads.