Onkyo A-9070 Product Sheet

2011 NEW PRODUCT RELEASE

A-9070

INTEGRATED STEREO AMPLIFIER

BLAC K

Power and Clarity in One Sophisticated Device

Onkyo has decla red war on distor tio n. The s ucces s of its c ampai gn aga inst noise is evi dent t he moment you

switch on the A-90 70 Int egrat ed Stereo Amp lifie r. New DIDRC (Dynamic Inter modul ation Disto rti on Red uctio n

Circuitr y ) dampens super high frequency distortion. Closed ground-loop circuits , HICC (High Inst antan eous-

Current Cap abili ty), and vibration-damping construction com bine t o pro duce a startlingly pure sound across a

wide dy namic range . The un it’s four 15,0 00 µF cap acito rs ke ep plenty of power a t the ready. Efficient paral lel

push-pull amplification paired with three-stage invert ed Dar lingt on circuit r y works at reducing distortion to

almost nil. Sep arate Wolfso n

unit is also equipp ed with 1 92 kHz /24-b it HD audio playbac k to hand le mod ern form ats. Four discrete am plifier

modes—integrated amp, power a mp, pre-a mp, and split pre- amp/p ower amp—o ffer flexibility wh en int egrat ing

other h i-fi c ompon ents. De tails like an indep enden t head phone ampli fier, a phonograph equalizer, three d igita l

audio i nputs, four anal og inp uts, and gold-pl ated audio ter minals/speaker posts speak of the hi ghest build quality.

The sup erb cr aftsm anshi p, tech nolog ical refinement, and att entio n to detail investe d in the A-9070 ma ke it worthy

of seri ous co nside ratio n for tho se in the market for to p-she lf hi- fi gear.

AMPLIFIER FEATURES

• 140 Watts per Channel at 4 Ohms, 20 Hz–20 kHz,

0.05%, 2 Channels Driven, FTC

• AWRAT (Advanced Wide Range Amplifier Technology)

• DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry)

• Parallel Push-Pull Amplification Design with ThreeStage Inverted Darlington Circuitry

• 192 kHz/24-Bit HD Audio Playback via Coaxial Inputs

192 kHz /24-bit DACs for both l eft and right c hanne ls imp rove performan ce. The

• New Circuit Board Construction with Internal Struts to Reduce Vibration

• Symmetrical Layout of L/R Channels

• Separate Wolfson (WM8742 x 2) for L/R Channels

• Four Large 15,000 µF Capacitors

• 0.05˝ (1.2 mm)-Thick Copper Bus Plate for Perfect Grounding

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

192 kHz/24-Bit DACs

OTHER FEATURES

• 3 Digital Audio Inputs (1 Optical and 2 Coaxial)

• 3 Analog Audio Inputs and 1 Output

• Main-In Terminal

• Independent Headphone Amplifier

• Discrete Phono Equalizer (MM/MC)

• Speaker A/B Drive

• Audio L/R Pre-Out

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

• Machined, Gold-Plated RCA and Phono Terminals

• Auto Standby Function

A-9070

WRAT (Advanced Wide Range Amplifier

echnology)

he A-9070 employs a host of proprietar y Onkyo

INTEGRATED STEREO AMPLIFIER

technologies to ensure optimal audio performance.

. DIDRC (Dynamic Intermodulation Distor tion Reduction Circuitry)

Despite being beyond the normal range of human hearing, frequencies above 100 kHz are susceptible to clock pulse and other

orms of distortion from digital devices. Such distortion in the super

f high frequency range can gen erate “beat interference”, which in turn affects the character or atmosphere of the original sound. By

mproving linear ity and reducing distortion in the super-high

i frequency range, Onkyo’s new DIDRC technology effectively red uces perceptible noise.

2. Low Negative-Feedback Design

Too much NFB makes a system susceptible to counter-electromotive

orce from the speakers, resulting in a drop in perceived sound

f quality. To avoid this, Onkyo focuses on improving the frequency response and reducing distor tion, without relying so much on NFB.

3. Closed Ground-Loop Circuits

he A-9070 employs a sophisticated closed-circuit des ign in which

T each circuit has a separate link to the power sup ply. This helps to cancel individual circuit noise and keep the ground potential free of distortion.

4. HICC (High Instantaneous-Current Capability)

andling current loads up to 100 amperes, HICC enables an

H amplifier to immediately cancel the speaker s’ reflex energy and instantaneously send out the next signal. The same high cur rent

equired to achieve this also supports the amplifier’s ability to

r handle speaker impedance fluctuations.

5. Symmetrical Twin-Monaural Construction

Power devices for the left and right channels of the A-9070 are

ligned symmetr ically. Each channel has the same electrical and

a structural design, and signal pathways are uniform in length. This

elps to minimize error s in stereophonic playback.

Parallel Push-Pull Amplification Design with Three-

tage Inverted Darlington Circuitry

With parallel “push-pull” amplification, the amplifier’s

ransistors alternately “push” and “pull” the current. In pair s,

t one output device (a transistor) will amplify the positive half of the waveform, while another output device amplifies

he negative. Push-pull amplification is highly efficient, but

t can be affected by occasional instances of distor tion. This is

here the three-stage inver ted Dar lington circuitry comes

w in.Three-stage inverted Darlington circuitr y actively works to reduce distortion by employing a low negative-feedback

esign to maintain voltage stability and enhance tr ansient

d response. It’s extremely sensitive to oscillations and requires sophisticated control technology. Together with the

ush-pull amplifier design, the three-stage inverted

p Darlington Circuitr y shapes a clean, consistent signal to

end to the outputs.

our Amplifier Modes for the Ultimate in

F Versatility

oasting the combined capabilities of a pre-amp and a

B power amp, the A-9070 is an amplifier with a difference. At

he turn of a knob, it can be configured to run in any one

t of four distinct modes. Depending on how you want to integrate it into your hi-fi system, you can use it as an

ntegrated amp, as a power amp, or as a pre-amp. On top

i of that, you can also set up the A-9070 in split mode. This

nables the pre-amp and power amp to work separ ately, so

e you can incor porate another device , such as an equalizer.

Separate Wolfson®192 kHz/24-Bit DACs for L/R Channels

High-quality Wolfson DACs work to optimize analog audio performance on the A-9070. The receiver features dual

4-bit WM8742 DACs, which support sampling r ates of up

2 to 192 kHz. Although these DACs are specified to handle

wo-channel audio on a single chip, Onkyo employs

t separate chips for each stereo channel to ensure the most accurate digital-to-analog conversion.

New Circuit Board Construction

ather than being directly connected to the chassis base,

R the circuit boards inside the A-9070 are cushioned by internal struts and affixed to the front, side, and rear panels.

his method of construction prevents vibrations from the

T chassis from adversely affecting the circuit boards.

Audiophile-Quality Parts

To ensure optimal performance from the A-9070, Onkyo’s engineers incorporated a range of professional-grade parts. Four 15,000-microfarad capacitors and an extremely low-

mpedance 0.05˝ (1.2 mm) thick copper bus plate both

i contribute to achieving a smooth and stable power supply. Machined and gold-plated RC A and phono ter minals

nsure an extremely clean connection.

SPECIF ICATI ONS

ower Output 140 W/Ch (4 ohms, 20 Hz–20 kHz, 0.05%,

ynamic Power 450 W (1 ohms), 310 W (2 ohms),

THD+N (Total Harmonic Distortion + Noise)

Damping Factor 130 (1 kHz, 8 ohms) Input Sensitivity and Impedance

Rated RCA Output Level and Impedance

aximum RCA Output Level and Impedance

hono Overload 70 mV (MM, 1 kHz, 0.5%)

requency Response 10 Hz–100 kHz/+0 dB, -1 dB (1 W, Line)

Tone Control ±10 dB, 80 Hz (Bass)

ignal-to-Noise Ratio 107 dB (Line, IHF-A)

Speaker Impedance 4 ohms–16 ohms (A or B),

Gener al

Power Supply AC 120 V~, 60 Hz

ower Consumption 3.3 A

tandby Power Consumption

Dimensions (W x H x D)

Weight 39.9 lbs. (18.1 kg)

CARTON

imensions (W x H x D)24

eight 48.5 lbs. (22.0 kg)

PC CODE

(B)

upplied Accessories

• Instruction manual • AC power cord • Remote controller

• AAA (R03) batteries x 2

2 channels driven, FTC) 75 W/Ch (8 ohms, 20 Hz–20 kHz, 0.05%, 2 channels driven, FTC)

230 W (3 ohms), 180 W (4 ohms), 100 W (8 ohms)

0.006% (Half power) .03% (1 kHz, 1 W Output)

0.008% (20 Hz–20 kHz, Half power)

0.03% (20 Hz–20 kHz, 1 W Output)

50 mV/47 k-ohms (Line)

.25 mV/47 k-ohms (Phono MM)

0.18 mV/100 ohms (Phono MC)

V/300 ohms (Pre out)

5 V/300 ohms (Pre out)

5.2 mV (MC, 1 kHz, 0.5%)

1 Hz−250 kHz/+0 dB, -3 dB (1 W, 8 ohms)

±10 dB, 10 kHz (Treble)

60 dB (Phono MM, IHF-A)

0 dB (Phono MC, IHF-A)

8 ohms–16 ohms (A + B)

0.1 W

17 1/8˝ x 6 7/8˝ x 16 15/16˝

435 x 174.5 x 431 mm)

(

x 12

x 21˝

/8˝

(627 x 320 x 534 mm)

751398010392

Due to a policy of continuous product improvement, Onkyo reserves the r ight to change specifications and appearance without notice.

NPR No. 11N96 08/11