ONKYO: A 9000

A 9000 – Power Amplifier | ONKYO




Elite Integrated Amp Brings Your Music to Life

Built to exacting standards by—and for—genuine music
lovers, the A-9000R offers a unique combination of performance and
versatility. As one of Onkyo’s new Reference series hi-fi components,
the A-9000R shares an advanced design DNA with its sibling models. Like
the M-5000R power amp, it includes AWRAT, quad push-pull amplification,
and three-stage inverted Darlington circuitry. And like the P-3000R
pre-amp, it features Amphenol AES/EBU digital connectors and employs
asynchronous signal transfer over USB to support pristine playback of HD
audio. On top of this, the A-9000R also incorporates separate 192
kHz/24-bit Wolfson® DACs for L/R channels, a noise-reducing DIDRC sound
module, and a low-vibration chassis to minimize interference and
preserve signal quality. But what sets this unit apart is its ability to
be configured in any of four different amplifier modes, depending on
how you want to integrate it with your other hi-fi gear. It’s that kind
of versatility, married to high-end build quality, that makes the
A-9000R an extremely appealing choice for the audiophile.

AWRAT (Advanced Wide Range Amplifier Technology)

The A-9000R employs a host of proprietary Onkyo technologies to ensure optimal audio performance.

1. DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry)
Despite being beyond the normal range of human
hearing, frequencies above 100 kHz are susceptible to clock pulse and
other forms of distortion from digital devices. Such distortion in the
super high frequency range can generate “beat interference”, which in
turn affects the character or atmosphere of the original sound. By
improving linearity and reducing distortion in the super-high frequency
range, Onkyo’s new DIDRC technology effectively reduces perceptible

2. Low Negative-Feedback Design
Too much NFB makes a system susceptible to
counter-electromotive force from the speakers, resulting in a drop in
perceived sound quality. To avoid this, Onkyo focuses on improving the
frequency response and reducing distortion, without relying so much on

3. Closed Ground-Loop Circuits
The A-9000R employs a sophisticated closed-circuit
design in which each circuit has a separate link to the power supply.
This helps to cancel individual circuit noise and keep the ground
potential free of distortion.

4. HICC (High Instantaneous-Current Capability)
Handling current loads up to 140 amperes, HICC enables
an amplifier to immediately cancel the speakers’ reflex energy and
instantaneously send out the next signal. The same high current required
to achieve this also supports the amplifier’s ability to handle speaker
impedance fluctuations.

5. Symmetrical Twin-Monaural Construction
Power devices for the left and right channels of the
A-9000R are aligned symmetrically. Each channel has the same electrical
and structural design, and signal pathways are uniform in length. This
helps to minimize errors in stereophonic playback.

Quad Push-Pull Amplification Design with Three-Stage Inverted Darlington Circuitry

Three-stage inverted Darlington circuitry brings
greater efficiency to the A-9000R power amp by employing a low-NFB
design to maintain voltage stability and enhance transient response.
Extremely sensitive to oscillations, this circuitry requires very
advanced control technology in order to be incorporated into the
amplifier. Breaking further new ground, the A-9000R employs two extra
transistors for each channel in a “quad push-pull” design that
significantly enhances amplification power.

Asynchronous Transfer via USB for 192 kHz/24-Bit HD Audio
On the rear panel of the A-9000R is a USB input
that lets you connect a PC and play back stunningly lifelike 192
kHz/24-bit HD audio formats*. The USB implementation here utilizes
asynchronous transfer to enhance the stability and quality of the audio


AWRAT (Advanced Wide Range Amplifier Technology)

DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry)

Quad Push-Pull Amplification Design with Three-Stage Inverted Darlington Circuitry

192 kHz/24-Bit HD Audio Playback via USB*(Asynchronous Transfer)

Separate Anti-Vibration Aluminum Panels for Top, Front, and Sides

New Circuit Board Construction with Internal Struts to Reduce Vibration

Symmetrical Layout of L/R Channels

Separate Wolfson® 192 kHz/24-Bit DACs (WM8742 x 2) for L/R Channels

Four Large 18,000 µF Capacitors

1.2 mm-Thick Copper Bus Plate for Perfect Grounding

Four Amplifier Modes (Integrated Amp, Power Amp, Pre-Amp, Split Pre-Amp/Power Amp)

4 Digital Audio Inputs (1 Amphenol AES/EBU, 1 Optical, and 2 Coaxial)

3 Analog Audio Inputs and 1 Output

Main-In Terminal

Audio L/R Pre-Out

Machined, Gold-Plated RCA and Phono Terminals

Customized, Gold-Plated, Banana Plug-Compatible Speaker Posts

Independent Headphone Amplifier

Discrete Phono Equalizer (MM/MC)

Speaker A/B Drive



ONKYO Australia - ONKYO Receivers, Amplifiers & More

Shop all products ONKYO, including ONKYO Receivers, ONKYO Amplifiers and much more. RIO Sound and Vision stock the largest range of ONKYO products, available in-store and online. Free delivery Australia wide. ONKYO products provide high quality products for your home theatre or surround sound system. All of RIO Sound and Vision's products come with a full Australian 3 year warranty. As the largest ONKYO dealer in Australia, with over 25 years in the Vision and HiFi industry, RIO Sound and Vision can tailor your new ONKYO system with ease and affordability.

Additional information

Price Bracket


140 W/Ch at 4 Ohms, 20 Hz–20 kHz, 0.05%, 2 Channels Driven, IEC
75 W/Ch at 8 Ohms, 20 Hz–20 kHz, 0.05%, 2 Channels Driven, IEC

Frequency Response:
10 Hz–100 kHz/+0 dB, -1 dB (1 W, LINE)
1 Hz–250 kHz/+0 dB, -3 dB (1 W, 8 Ohms)

Signal-to-Noise Ratio:
107 dB (Line, IHF-A)
60 dB (Phono MM, IHF-A)
70 dB (Phono MC, IHF-A)

WHD: 435 x 175 x 435 mm

Weight: 18.5 kg


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