TX-SR503 7.1-Channel Home Theater Receiver

Complementing Video Brilliance with Audio Excellence

Finding the perfection of HDTV is an undeniable pleasure. The discovery of home theater is a revelation. Anchored around Onkyo’s build quality and proprietary technologies—Wide Range Amplifier Technology (WRAT) and Optimum Gain Volume Circuitry—the groundwork is laid for powerful audio reproduction without the noise and distortion that limits other receivers. The TX-SR503 7.1-channel home theater receiver incorporates 192 kHz/24-bit digital-to-analog converters for all 7.1 channels to preserve the quality of your audio, and it also offers HDTV-capable (50 MHz) component video switching to give you connectivity and versatility with the latest displays (with still enough options for those who haven’t made the change). With superb functionality and ease of use, the TX-SR503 is perfectly suited for those looking to explore quality home theater in the HDTV environment, now and in the future.

Power Specifications
Power Output* (8 ohm, 20 Hz-20 kHz, FTC)
Front L/R 75 W/Ch
6 ohm Capable
4 ohm Capable
Center 75 W
Surround L/R 75 W/Ch
Surround Back 75 W
Dynamic Power**
3 ohm (Front) 160 W
4 ohm (Front) 150 W
8 ohm (Front) 95 W
Amplifier Design
Color Coded Speaker Terminals
Identical Full-Bandwidth Channels 5
Reduced NFB (Negative Feedback) Design
WRAT (Wide Range Amplifier Technology)
Non-Scaling Configuration
DACs 192 kHz/24-Bit x 7
High Current Low Impedance Drive
All Discrete Output Stage Amplifiers
Optimum Gain Volume Circuitry
Comb Filter for Composite to S
Digital Upsampling
HDMI Video Upconversion
Home Theater Features
HDMI Switching Input/Output
Cinema Re-EQ
THX Surround EX and THX Certified
Extended Frequency Response (+ 1 dB, - 3 dB) 10 Hz-100 kHz
DTS 96/24
DTS, DTS-ES Discrete/Matrix 6.1, DTS Neo:6
Dolby ProLogic IIx
Dolby Digital, Dolby Pro Logic II
Dolby Digital EX
A-Form Listening Mode Memory
Composite to S-Video Conversion
Composite and S-Video to Component Video Upconvers
Multichannel Input 5.1
Digital Soundfield Processing Modes 9
Late Night Mode
On-Screen Display
Adjustable Digital Delay
Crossover Adjustment
Internet Features
Number of Presets (Internet Radio)
Front-Panel Optical
Audio and AV Inputs 2/4
HDTV-Ready Component Video Input/Output
Front-Panel Video Input (with S-Video)
S-Video Compatible Jacks Input/Output 4/2
Digital Inputs 3 Optical, 1 Coaxial
Digital Output
Amp In
RS-232 Control Port
IR In/Out
Pre Outs
Front L/R, Center
Surround L/R
Surround Back
Time Base Correction (TBC)
Other Features
Dot-Matrix Display
Display Dimmer 3 Levels
Enhanced IPOD Compatibility
DS-A1 Compatible
Pure Audio Mode
Zone 2 Subwoofer
Zone 2 Composite Video
Zone 2 OSD
Dual Banana Plug Compatible Speaker Terminals
Sleep Timer (90 minutes; 10-min steps)
Absolute/Relative Volume Display Absolute
Intelli Volume
Phono Input
Headphone Jack
Zone 2 (Multisource) Line Out
Powered Zone 2
12 Volt Trigger
A/B Speaker Drive A and B
Tuner Features
Number of Presets (FM/AM) 30
RI-Compatible Remote Control Prepro
Macro Function
Amplifier Section
Tone Controls
Front L/R75 W/Ch
Center75 W
Surround L/R75 W/Ch
Surround Back75 W
3 ohm180 W
4 ohm140 W
8 ohm95 W
THD (Rated Power)0.08 % (all channels)
Damping Factor (1 kHz, 8 ohm)60
CD and TAPE Play200 mV, 50 k ohm
TAPE REC200 mV, 470 ohm
PRE OUT1.0 V, 470 ohm
Frequency Response10 Hz-100 kHz (+ 1 dB, - 3 dB)
CD/TAPE100 dB (IHF-A, 0.5 V input)
BASS+/- 10 dB at 50 Hz
TREBLE+/- 10 dB at 20 kHz
Tuner Section
FM Mono0.2 %
FM Stereo0.3 %
AM0.7 %
FM Stereo Separation 45 dB at 1 kHz,30 dB at 100 Hz-10 kHz
Dimensions (W x H x D)17 1/8" x 5 7/8" x 14 3/4"
Weight20.7 lbs

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