ONKYO A-9050 User Manual
2012 NEW PRODUCT RELEASE
A-9050
Integrated Stereo Amplifier
BLAC KSI LVER
Driving Your Music with Power and Panache
The A-9050 Integrated Stereo Amplier offers the best of both worlds—classic analog power and the latest in digital audio
processing technology. Whether you’re transported by the mellow glow of vinyl, or just want to experience your computer-
based library with proper hi- sound, this is the amp for you. There are two digital inputs linked to a Wolfson
bit DAC, which allow you to exploit the potential of lossless formats such as WAV. Gold-plated audio terminals and gold-
plated banana plug-compatible speaker posts ensure a perfect connection for your CD player, tuner, and loudspeakers.
However, it’s the sound quality that really puts this amplier in a league of its own. Our low negative feedback WRAT design
breathes energy and vitality into recordings that can otherwise seem lifeless and at. As well as DIDRC to eliminate digitally
generated noise, the amplier’s Three-Stage Inverted Darlington Circuitry boosts current ows and reduces distortion.
Plenty of good clean power—and a dash of Japanese audio innovation—has resulted in a stereo amp that’s shaping up to
become a new Onkyo classic.
®
FEATURES
•
75 W/Ch
(8 Ω, 1 kHz, 0.08% THD, 2 Channels Driven, IEC)
•
DIDRC (Dynamic Intermodulation Distortion
Reduction Circuitry)
• Three-Stage Inverted Darlington Circuitry
• WRAT (Wide Range Amplier Technology)
• High-Current Low-Impedance Drive
•
Thick, Low-Impedance Copper Bus Bars
• Two 10,000 µF Capacitors
• Wolfson
192 kHz/24-Bit DAC (WM8718)
• Phase-Matching Bass Boost
• Optimum Gain Volume Control
• Direct Mode
•
96 kHz/24-Bit Capable Digital Audio Inputs
(1 Optical and 2 Coaxial)
• 5 Analog Audio Inputs and 1 Output
• Phono Input (MM)
• Audio L/R Pre-Out
• Subwoofer Pre-Out
• Speaker A/B Drive
• Gold-Plated RCA Terminals
•
Gold-Plated, Banana Plug-Compatible Speaker Posts
• 1.6 mm Full Flat Chassis
• Aluminum Front Panel and Volume Knob
• Tone Control (Bass/Treble/Balance)
• Headphone Jack
• RI (Remote Interactive) Remote Control
®
192 kHz/24-
A-9050
Integrated Stereo Amplifier
WRAT (Wide Range Amplier Technology) for
Naturally Vivid Sound
Onkyo developed the WRAT suite of technologies to
improve the clarity and character of amplied audio. The
technologies work to reduce noise across the frequency
range, guaranteeing a clear, balanced, and natural sound. It
achieves this by employing a low negative feedback amplier
design, preserving the essential energy and life contained
within the recording; using closed ground-loops to cancel
unwanted noise from individual circuits; and by enabling high
current ows to cancel reex energy from the speakers.
DIDRC (Dynamic Intermodulation Distortion
Reduction Circuitry)
Despite being beyond the normal range of human hearing,
frequencies above 100 kHz are susceptible to digital
clocking-signal pulse and other forms of subtle distortion.
Noise in the super-high-frequency range can affect the
character or atmosphere of the original sound. Onkyo’s
DIDRC technology—formerly only available on its premium
audio products—works by reducing distortion in the superhigh-frequency range to deliver clearer-than-ever audio.
Innovative Three-Stage Amplier Circuit Brings
Your Music to Life
While some hi- makers take a shortcut to amplied audio
with the use of cheap all-in-one IC chips, the resulting
sound is compromised once you turn the volume up.
Instead, on the A-9050, Onkyo uses the same Three-Stage
Inverted Darlington Circuitr y technology it uses in its highend A/V receivers and Reference Series hi- separates. This
innovative circuit topology facilitates high speaker-driving
power, reduces distortion, and preserves the buoyancy and
expressiveness of recorded music—a unique characteristic
of our low negative feedback ampliers.
Discrete Output Stage Circuitry Means Cooler
Running Temperatures
A receiver’s ability to deliver high power into low
impedances is a vital factor in its performance. If the current
ow through the amplication circuit is inconsistent, audio
quality will suffer. Onkyo stereo ampliers feature separate
high-quality components at the signal output stage. Discrete
transistors help guarantee a consistent, stable supply of
current to the speaker system for an open and assured
performance, with less chance of distortion and cooler
running temperatures.
Phase-Matched Bass Boost for Deeper Bass and a
Clearer Mid-Range
From the warm low notes produced by a cello to the deep
frequencies of electronic music, a good amplier should
be able to deliver plenty of bass without distorting. Some
ampliers are prone to the effects of phase shifting, which
can overwhelm middle frequencies and muddy the overall
sound. Our Phase-Matching Bass Boost technology effectively
preserves mid-range clarity—allowing vocals and strings to
shine—while maintaining a smooth, natural bass response at
all volume levels.
More Digital and Analog Connections
Being a thoroughly modern integrated pre-amp and power
amplier, the A-9050 features 96 kHz/24-bit optical and
coaxial inputs which can carry digital audio signals from
source devices—such as computers or laptops—for
processing by the onboard Wolfson 192 kHz/24-bit DAC.
Now you can experience the full potential of high resolution
and lossless formats such as WAV. Of course, digital inputs
also let you play everything from your computer’s iTunes
collection to movie downloads with power and precision
beyond anything you’re used to from your PC’s speakers.
High-Output Power Supply to Drive Your Speakers
At the heart of all our amplier s, you’ll nd a power supply
that can maintain or increase output power as required.
Musically, this means that you have deep, powerful bass;
wide-ranging dynamics; musical peaks that sound composed;
and correct timbre and sound staging. When paired with
a set of quality loudspeakers, Onkyo ampliers have the
capability to drive them with ease. In the case of the A-9050,
you will nd a high-output power transformer, two 10,000
μF capacitors, and low-impedance copper bus bars. All work
in concert to enhance the power and delity of your audio
sources.
Quality Construction Equals Better Performance
A vital factor in any audio component is its build quality. It’s
not just about good looks. The build quality of the chassis,
the construction techniques used, and the electronic parts
chosen all combine to shape the outputted audio signal. To
preserve the integrity of the signal and extend component
life, we’ve tted gold-plated RCA terminals and gold-plated,
banana plug-compatible speaker posts to the A-9050. To
prevent vibration, a 1.6 mm anti-resonant chassis is used
to isolate the audio signal from any interference during the
amplication process. This rugged chassis is superbly nished
with an aluminum front panel and volume control that
accentuate the quality of the construction throughout.
SPECIFICATIONS
Power Output 75 W/Ch (8 Ω, 1 kHz, 0.08% THD,
2 Channels Driven, IEC)
THD+N (Total Harmonic Distortion + Noise)
0.08% (1 kHz, 1 W Output)
Damping Factor 60 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance
175 mV/33 kΩ (Line)
4.8 mV/47 kΩ (Phono MM)
Rated RCA Output Level and Impedance
0.175 V/2.2 kΩ (Rec out)
Phono Overload 100 mV (MM, 1 kHz, 0.5%)
Frequency Response 10 Hz–100 kHz/+1 dB, -3 dB (Line 1)
Tone Control ±14 dB, 100 Hz (Bass)
±14 dB, 10 kHz (Treble)
+8 dB, 80 Hz (PM Bass)
Signal-to-Noise Ratio 110 dB (Line, IHF-A)
80 dB (Phono MM, IHF-A)
Speaker Impedance 4 Ω–16 Ω (A or B), 8 Ω–16 Ω (A + B)
General
Power Supply AC 230 V~, 50 Hz
Power Consumption 160 W
Standby Power Consumption
0.3 W
Dimensions (W x H x D) 435 x 139 x 330.3 mm
Weight 8.2 kg
CARTON
Dimensions (W x H x D) 572 x 264 x 419 mm
Weight 10.5 kg
Supplied Accessories
• Instruction manual • AC power cord • Remote controller
• AAA (R03) batteries x 2
Due to a policy of continuous product improvement, Onkyo reserves the right to change specications and appearance without notice. WRAT is a trademark of Onkyo Corporation. All other trademarks and registered trademarks are the property of their respective holders.
NPR No. 12N44 07/12
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