User's Manual
HT-S6405 
5.1-CHANNEL NETWORK A/V RECEIVER/SPEAKER PACKAGE
HDMI
Æ
 Support for 3D Video and Audio  
Return Channel
The four HDMI inputs on the HT-S6405’s A/V receiver let 
you simultaneously connect high-def sources such as a  
Blu-ray player, a gaming console, and a cable/satellite 
tuner. A single output then sends a pristine signal to 
your connected high-resolution display. The HDMI 
implementation on this receiver supports both 3D video 
and an Audio Return Channel, along with numerous  
high-resolution formats. 3D video brings exciting 
possibilities to home entertainment, with movie, game, 
and broadcast content on the increase and 3D-compatible 
TVs now on the market. Meanwhile, the Audio Return 
Channel allows audio content received directly by your 
HDTV’s tuner to be sent “upstream” via HDMI to your 
A/V receiver, without the need for a separate S/PDIF audio 
cable.
Network Capability Delivers Internet Radio and 
Network Audio Streaming via Ethernet
As one of Onkyo’s new breed of receivers that can link 
directly to the internet or to your home PC via a local 
network, the HT-S6405’s A/V receiver takes streaming 
audio and internet radio to a whole new level. MP3, 
WMA, WMA Lossless, FLAC, WAV, Ogg Vorbis, AAC, 
and LPCM audio files can now be played back through 
your main system with unprecedented power and fidelity. 
The receiver also brings to life a huge array of internet 
radio channels from Last.fm* and vTuner. As well as 
being compatible with earlier platforms, the receiver is 
compatible with Microsoft’s Windows
Æ
 7 platform, which 
includes the DLNA  
1.5-specified “Play To” media-streaming feature. The 
receiver’s internet connectivity has the added benefit of 
making firmware updates simpler than ever.  
*Availability of services depends on region.
Direct Digital Connection of iPod/iPhone via 
Front-Panel USB Port
The front-panel USB port on the HT-S6405’s A/V receiver 
lets you access MP3, WMA, FLAC, and AAC audio files 
stored on a USB flash drive or iPod/iPhone. As the audio 
signals are transported in digital form, rather than analog, 
there is much less chance for signal degradation. End result: 
your music sounds cleaner and more faithful to the original. 
A further benefit of the USB input is that it lets you use the 
system’s remote controller to play back audio files on the 
connected device.
A Suite of Audyssey Technologies for the Ideal 
Listening Environment
The HT-S6405 comes equipped with three sound-
enhancing Audyssey technologies.
(1) Audyssey 2EQ
Æ
 tailors multi-channel audio for your home 
cinema speaker set-up by measuring three room positions and 
applying a resolution filter to the satellite speakers to correct for 
room acoustics.
    5 Hz–100 MHz/0 dB, -3 dB
Tuner Section
Tuning Frequency Range 
  FM  87.5 MHz–108 MHz  
  AM  522 kHz–1,611 kHz 
    530 kHz–1,710 kHz
FM/AM Preset Memory  40 stations
General
Power Supply  AC 230 V~, 50 Hz
Power Consumption  370 W
Dimensions (W x H x D)  435 x 173.5 x 328 mm
Weight  9.2 kg
SPEAKER SYSTEM
Speaker Type 
  Front  2-way, Acoustic suspension 
  Center  2-way, Acoustic suspension 
  Surround  Full-range, Acoustic suspension 
  Subwoofer  Bass reflex, Powered 
Drivers 
  Front  8 cm cone woofer 
    2.5 cm balanced-dome tweeter 
  Center  8 cm cone woofer x 2 
    2.5 cm balanced-dome tweeter  
  Surround  8 cm cone  
  Subwoofer  20 cm cone
Frequency Response   
  Front  70 Hz–50 kHz 
  Center  70 Hz–50 kHz  
  Surround  80 Hz–20 kHz 
  Subwoofer  27 Hz–150 Hz
Output Sound Pressure Level   
  Front  79 dB/W/m 
  Center  82 dB/W/m  
  Surround  80 dB/W/m
Max. Input Power   
  Front/Center/Surround 130 W
Rated Output Power 
  Subwoofer  80 W (Minimum continuous power, 4 Ω, 
    100 Hz, 1%, IEC)
Nominal Impedance   
  Front/Center/Surround 6 Ω
Input Sensitivity/Impedance   
  Subwoofer  410 mV/20 kΩ
General
Dimensions (W x H x D)   
  Front  102 x 170 x 105 mm 
  Center  277 x 110 x 110 mm  
  Surround  102 x 170 x 105 mm 
  Subwoofer  230 x 425 x 412 mm
Weight   
  Front  1.0 kg 
  Center  1.7 kg  
  Surround  0.9 kg 
  Subwoofer  9.1 kg
CARTON
Dimensions (W x H x D)  566 x 531 x 769 mm
Weight  29.5 kg
Supplied Accessories
• Indoor FM antenna • AM loop antenna • Color-coded speaker 
cable • Subwoofer cable • Speaker set-up microphone • Instruction 
manual • Quick set-up guide • Remote controller • AA (R6) 
batteries x 2
Due to a policy of continuous product improvement, Onkyo reserves the right to change specifications and appearance without notice. Manufactured under license from Dolby Laboratories. Dolby, Pro Logic, and the double-D symbol are trademarks of Dolby Laboratories. DTS, 
DTS-HD, and the DTS symbol are registered trademarks and the DTS logo is a trademark of DTS, Inc. Manufactured under license from Audyssey Laboratories, Inc. U.S. and foreign patents pending. Audyssey 2EQ, Audyssey Dynamic EQ, and Audyssey Dynamic Volume are 
registered trademarks of Audyssey Laboratories, Inc. HDMI, the HDMI logo, and High-Definition 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 shuffle, 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 accessory has been designed to connect specifically to iPod or iPhone, respectively, and has been certified 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 accessory with iPod or iPhone may affect wireless performance. x.v.Color is a trademark of Sony 
Corporation. Music Optimizer, CinemaFILTER, and Theater-Dimensional are trademarks of Onkyo Corporation. All other trademarks and registered trademarks are the property of their respective holders.
NPR No. 11N52 03/11
 SPECIFICATIONS
A/V RECEIVER
Amplifier Section
Power Output   
  Front L/R  130 W/Ch  
  (6 Ω, 1 kHz, 1%, 1 channel driven, IEC) 
  Center  130 W  
  (6 Ω, 1 kHz, 1%, 1 channel driven, IEC)  
  Surround L/R  130 W/Ch  
  (6 Ω, 1 kHz, 1%, 1 channel driven, IEC)
Dynamic Power  180 W (3 Ω, Front) 
    160 W (4 Ω, Front) 
    100 W (8 Ω, Front)
THD+N (Total Harmonic Distortion + Noise) 
  0.08% (20 Hz–20 kHz, Half power)
Damping Factor  60 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance 
  200 mV/47 kΩ (Line)
Rated RCA Output Level and Impedance   
  200 mV/2.2 kΩ (Rec out)
Maximum RCA Output Level and Impedance 
  2.0 V/2.2 kΩ (Rec out)
Frequency Response  20 Hz–50 kHz/+1 dB, -3 dB (DSP bypass)
Tone Control  ±10 dB, 50 Hz (Bass) 
    ±10 dB, 20 kHz (Treble)
Signal-to-Noise Ratio  100 dB (Line, IHF-A)
Speaker Impedance  6 Ω–16 Ω
Video Section
Input Sensitivity/Output Level and Impedance 
  Video  1.0 Vp–p/75 Ω (Component Y)  
    0.7 Vp–p/75 Ω (Component P
B/CB, PR/CR) 
    1.0 Vp–p/75 Ω (Composite)
Component Video Frequency Response 
Front View Rear View
TX-NR509
(2) Audyssey Dynamic EQ
Æ
 maintains a consistent bass response, 
tonal balance, and surround-sound effect at different volume levels, 
so you can enjoy the natural dynamics of your content regardless 
of the volume.
(3) Audyssey Dynamic Volume
Æ
 automatically compensates for 
volume fluctuations in different audio content—for example, during 
commercial breaks—while optimizing the dynamic range.
Convenient Overlaid On-Screen Display via 
HDMI
Changing your A/V receiver’s settings is now more 
seamless than ever, thanks to Onkyo’s overlaid On-Screen 
Display (OSD) feature. On-screen set-up menus appear 
overlaid on the video image you’re watching. This means 
you can adjust the settings immediately, without having to 
switch back and forth from a blank screen background.
Sleek, Solid-Style, High-Density Speakers
The HT-S6405’s 5.1-channel speaker set includes a 
powered subwoofer and matching gloss-finished front, 
center, and surround speakers. These compact—yet 
reassuringly solid—speakers are made from a new, high-
density resin designed for maximum rigidity and minimum 
vibration. The elegantly curved shape of the speaker 
cabinets does more than just add a touch of class; it also 
helps to counteract standing waves, ensuring sound output 
with greater fidelity.


