Onkyo A-9070 specifications

Brand : Onkyo

General

Technical data

features

IEC AWRAT (Advanced Wide Range Amplifier Technology)
DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry)
Parallel push-pull amplification design with three-stage inverted Darlington circuitry
playback of HD Audio with 192 kHz/24-Bit coaxial inputs
New Board arrangement with struts to reduce vibration
Symmetrical arrangement of the right and left channel
Separate 192 kHz/24-Bit DAC from Wolfson® (2 × WM8742) for the left and right channels
Four large Capacitors with 15,000 µF, 1.2 mm copper bus plates for perfect ground
modes of operation
- amplifier
- power amplifier
- preamplifier
- divided into pre-amplifier/power amplifier
connections:
- 3 digital audio inputs (1 optical, 2 coaxial)
- 3 analog audio inputs
- 1 output "Main-In"input
stand-alone amplifier for headphones
Discrete Phono Equalizer (MM/MC)
according to the panel A/B
speak out pre-amp outputs for Audio (left/right)
Customized, gold-plated, banana plug-compatible speaker terminals
gold-Plated, solid RCA and Phono inputs
Automatic standby function
AWRAT (Advanced Wide Range Amplifier Technology)

", Onkyo has announced distortion of the fight. You will suddenly become aware of how successful this battle is when you turn on the A-9070 stereo integrated amplifier. The new DIDRC circuit (Dynamic Intermodulation Distortion Reduction Circuitry) attenuates distortions in the high-frequency range. Closed ground loops, HICC (High Instantaneous-Current Capability) and the vibration-damping structure together create a sound of amazing clarity and dynamics. The four 15,000 µF capacitors provide ample power reserves. In conjunction with a three-stage, inverted Darlington circuit, the efficient parallel push-pull output stage reduces distortions to close to zero. Separate 192 kHz/24-bit DA converters from Wolfson® for the left and right channels improve performance. The device also allows playback of modern formats by supporting HD audio at 192kHz/24-bit. Four operating modes – integrated amplifier, power amplifier, preamplifier, preamplifier/power amplifier split - ensure maximum flexibility when integrating into existing Hi-Fi systems. Details such as an independent headphone amplifier, a phono equalizer, three digital audio inputs, four analog inputs, as well as gold-plated audio and speaker connectors testify to the highest quality. The excellent workmanship, the technical finesse and the sense of detail that Onkyo shows with the A-9070 make the device a serious candidate for music lovers who are looking for a top-class Hi-Fi amplifier."

"Various technologies developed by Onkyo are used in the A-9070,which ensure optimal audio performance:

1. Although DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry) frequencies above 100 kHz are not audible to the human ear, they are susceptible to clock signals and other types of distortions emanating from digital devices. Distortions in this extremely high frequency range can create a "beat interference" that affects the character or atmosphere of the actual sound. By improving linearity and reducing distortion in this frequency range, Onkyo 's new DIDRC technology provides a noticeable reduction in noise.

2nd circuit with low negative feedback. High feedback makes systems vulnerable to the counter-electromotive force of the speakers, which leads to a weakening of the sound quality. In order to optimize the audio quality, Onkyo focuses on improving the frequency response and reducing distortion, without relying solely on the circuit with low negative feedback.

3. Closed ground loops. The A-9070 uses a sophisticated circuit design with closed loops, in which each circuit is individually connected to the power supply. As a result, the noise of the individual circuits is reduced and the ground potential is kept free of distortions.

4. HICC (High Instantaneous Current Capability). With the HICC function designed for up to 100 amperes, the amplifier can immediately neutralize the back-induction energy of the speakers and emit the next signal. In order to achieve this goal, an equally high current is required as for controlling the impedance fluctuations of the loudspeakers.

5. Symmetrical twin-mono construction. The A-9070 has a symmetrical arrangement of the amplifier modules for the left and right channels. Each channel has the same electrical and structural design, so that the signal paths are the same length in each case. In this way, errors in stereo playback can be minimized.

Parallel push-pull amplification with three-stage, inverted Darlington circuit. In a push-pull output stage, the transistors of the amplifier operate in push-pull mode. One of the transistors arranged in pairs amplifies the positive half-wave of the signal, the other the negative half-wave. Push-pull power amplifiers are highly efficient, but can occasionally suffer from distortion. This is where the three-stage, inverted Darlington circuit comes into play: it reduces distortions by providing voltage stability and improving dynamic behavior through a low negative feedback design. Since the circuit is sensitive to vibrations, it requires sophisticated control technology. In conjunction with the push-pull power amplifier, the three-stage, inverted Darlington circuit delivers a clear, even signal to the outputs.

Four operating modes for maximum flexibility. The innovative combination of the functions of preamplifier and power amplifier make the A-9070 a special device. By turning a knob, you can choose between four different operating modes. The A-9070 can be operated as an integrated amplifier, as a power amplifier or as a preamplifier, depending on how you want to integrate it into your Hi-Fi system. In addition, a division of pre- and final stage ispossible. In this case, the preamplifier and the power amplifier work independently of each other, so that another device such as an equalizer can be interposed.

Separate 192 kHz/24-bit DA converters from Wolfson® for the left and right channels. The high-quality DA converters from Wolfson contribute to the optimization of the analog sound quality of the A-9070. The amplifier has two 24-bit WM8742 type DA converters that support sampling rates of up to 192 kHz. Although these DA converters can process two-channel audio via a single chip, Onkyo uses its own chip for each stereo channel to ensure precise digital-to-analog conversion.

New board arrangement. The boards in the A-9070 are not connected directly to the chassis, but are cushioned with internal struts and are fixed on the front, sides and back. This prevents vibrations from the chassis from affecting the operation of the boards.

High-quality audiophile components. Onkyo 's engineers have integrated a whole range of professional components into the A-9070 to ensure optimal sound. Four 15,000µF capacitors and 1.2mm copper busbars with very low impedance ensure a uniform and safe power supply."

Onkyo A-9070