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An integrated amp with... integrity
Stereo. Two track for two ears. Still the gold standard for so much music listening today. Onkyo honors the simplicity and purity of stereo delivery with the A-9070 integrated amp, a meticulously engineered component that lives to treat both channels of your music with intensive, calibrated, and individualized attention.
There's plenty of power for demanding speakers. 75 watts pure channel of toned sonic muscle. High Instantaneous-Current Capability (HICC) uses four beefy on-board capacitors to provide instant energy for fast transients and punchy percussive attacks, while providing authoritative control to assist the speakers' fast recovery for the next musical challenge.
With the A-9070 integrated amp, Onkyo has declared war on distortion. Their Dynamic Intermodulation Distortion Reduction Circuitry (DIDRC) helps to dampen and reduce super high frequency distortion, a common issue for today's digital music sources. Parallel push-pull amplification works to reduce other possible sources of distortion to inaudible levels. The unit's case is constructed with vibration damping in mind, to reduce yet another possible source of sound degradation. And despite tipping the scale at a hair under 40 lbs., it's attractive: sleek and minimalist.
Your digital sources, polished
The A-9070's blend of power and precision can put fresh sparkle in classic music sources like a turntable or tape deck. And Onkyo is dead serious about making the most out of your digital sources. Two Wolfson® 24-bit/192 kHz digital-to-analog converters (DACs), dedicated to each channel, take a stream of 1s and 0s entering the unit from the optical and coaxial digital inputs and build them into beautiful music. Many of the A-9070's competitors need an external DAC to interface with disc players or streaming digital media players like a Sonos Connect® or Apple TV®. Onkyo coddled your digital sources with world-class circuitry, without the need for any additional purchases.
A "transformer" too
You might not need other components once deemed essential, either. This amp has four discrete modes that effectively turn it into three separate components. Its primary function is as an integrated amp, of course, but you can also use its preamp section to feed a separate power amp, or use its power amp with a preamp or receiver. Plus there's a split preamp/power amp mode that allows you to splice in a component in the path, like an equalizer. This unique flexibility means the A-9070 can be an excellent add-on upgrade for your home theater receiver, giving you options for great stereo music and extra power for your surround setup. And that's just one possible configuration. However you use the A-9070 in your system, you'll appreciate the build quality and attention to detail evident in touches like the machined, gold-plated input and output terminals.
- 75 watts x 2 channels into 8 ohms (20-20,000 Hz) at 0.05% THD
- 140 watts x 2 channels into 4 ohms (20-20,000 Hz) at 0.05% THD
- separate Wolfson® 192 kHz/24-bit DACs for left and right channels ensure high-quality analog output from digital sources
- Dynamic Intermodulation Distortion Reduction Circuitry (DIDRC) reduces perceptible noise generated by digital devices
- parallel push-pull amplification paired with three-stage inverted Darlington circuitry reduces distortion to inaudible levels
- high instantaneous-current capability (HICC) deploys up to 100 amperes to handle demanding speakers
- closed ground-loop circuits minimize individual circuit noise and reject ground potential distortion
- 4 amplifier modes: unit can be run as preamp, integrated amp, power amp, or in split preamp/power amp mode so that an additional component can be inserted along the signal path
- signal-to-noise ratio: 107 dB (line, IHF-A), 60 dB (phono MM), 70 dB (phono MC)
- independent headphone amplifier ensures solid signal for high-end headphones
- built-in phono preamp for use with moving magnet (MM) and moving coil (MC) cartridges
- 3 digital audio inputs (2 coax, 1 optical)
- 4 RCA audio inputs, including MM/MC phono input
- preamp out/main in jacks
- front-panel headphone jack
- front-panel switching for 2 pairs of speakers
- gold-plated binding-post speaker connectors
- detachable power cord
- remote control
- weight: 39.9 lbs.
- 17-1/8"W x 6-13/16"H x 18-5/16"D
- warranty: 2 years
- Our 60-day money-back guarantee
Everything you always wanted in a stereo receiver, except the radio
An integrated amplifier is essentially a receiver without a built-in AM/FM tuner. You get power to drive your speakers, audio controls, and inputs for music source components. Connect an iPod, a computer, a network music player, or any other device that can play Internet radio, and you may find you have no need for an AM/FM radio.
Onkyo A-9070 Reviews
Average Customer Review:
The lion with tender touch
Few days ago visited my friend to listen this amp.As I have Vincent SV-237 I thought I am wasting my time...Lord I was wrong..what a space,what a deep bass ,what a clear sound,what a power..yes Vincent has it all - almost twice the power ( 2 x 250 w on 4 ohm) but is costing more then twice...however there was something in the sound I just couldn't resist not to fall in love with this awesome amp once I connected it with my tower boxes Sigma 1000 from Magnat - its musicality was so great that I instantly sold Vincent and bought this beauty.It is a MUST HAVE amplifier !
Pros: great bass,unique musicality,drives with easy big hungry boxes
Cons: input knob is somewhat to sensitive
Crutchfield Customer Review (What's this?)
The clarity of sound reproduction with this amp is excellent. The power is sufficient. I am running two pair of tower speakers, two pair of book shelf sized speakers, and one powered sub-woofer with it. It powers the speakers all very well. The sub has it's own power. I did have to purchase a "speaker selector", to help protect the amp. I would give it five stars except for two issues. One, it has no powered outlets in the back of it. I have a cooler that sits over top of the amp placement, and a powered AC plug-in would turn off the cooler when the amp is turned off. No big deal, as I unplug everything when the stereo is not in use.The other issue is that it will only take 14 gauge speaker wire. It also takes quite a bit of manual dexterity to get the wires seated correctly into these terminals. Just a simple terminal where you could use spade lug type connectors would be much easier to use. All that being said, I wouldn't trade this amp for anything. Onkyo has a real winner here.
Pros: Has plenty of RCA connectors, two coaxial connectors, and an optical connector.
Cons: Could use one or two AC plug-ins, powered to go on and off with the amp. The speaker terminals aren't the easiest to use.
Crutchfield Customer Review (What's this?)
I always used it in the direct mode and experimented with feeding a couple of CD players (Koala tube CDP and a discontinued Sony SACD disc changer, SCD-C2000ES) by using analog, coaxial or optical connections. In all connection types, A-9070 performed very well, with no audible differences to my ears. I would eventually prefer using the optical digital cable (or coaxial digital cable) due to its simplicity to feed that pair of DAC chips in the amplifier. Therefore, one does not need an expensive CD player (with 24-bit/192 kHZ chip and all those surrounding circuitry on the CD player) to own with this superb amp, one would only need a reliable disc spinner and feed that spinner's unprocessed, digital output directly to this amp w/DAC using a simple digital optical or digital coaxial cable. This is a well-designed amp with crystal clear sound (in comparison to that tranquilized sound of my old tube amp which was also producing, for 6 years, for my room lots of heat through its old-school transformers) resulting in no listening fatigue at all. After wasting 6 years with my old tube amp, now, thanks to A-9070, is the time for me to discover those tiny details and nuances remained unheard in my favorite CDs. Onkyo A-9070 is a good amp, with an onboard DAC, exhibiting a high-level of electronics craftsmanship, at a sweet spot in price-wise comparison to its competitors such as Yamaha S1000 and S2000 (both w/o DAC), Music Hall a70.2 (w/o DAC) and Peachtree Audio Nova125 (w/DAC).
Pros: Highly recommended for its excellent sound and features!
The Onkyo A-9070 delivers!
Crutchfield Customer Review (What's this?)
I extensively researched the Onkyo A-9070 and three other comparable integrated amplifiers before making a decision. I am very pleased to have chosen the Onkyo A-9070. It is built very well with audiophile-quality parts, and it is highly versatile (it can be configured to perform in any one of four distinct modes) with many features. The separate Wolfson 192 kHz/24-Bit DACs feature really makes a difference in the sound. My CDs, LPs, and tapes sound so much clearer and with an enhanced definition. I highly recommend this product for its sound, quality, reliability, and price.
Pros: Four large 15,000 µF capacitors. Discrete phono equalizer (MM/MC). Independent headphone amplifier. Main-in terminal.
onkyo A 9070
Crutchfield Customer Review (What's this?)
I bought this integrated amp after doing hours and hours of research and sound testing of other integrated amps. What I found is you essentially you have to just leave it up to ones own ears to make the decision. Forget about manufacturer names and price tags. This product is excellent and the build quality is second to none at this price point. It is also extremely versatile.
Crutchfield Customer Review (What's this?)
Clean and clear sound.Nice to have built in Dac.
Pros: Headphone jack.I also have the Onkyo 7070 cd player.Great company.
Cons: Has a power on button that's easy to confuse with a standby indicator.So,it's not off when you may think it is.You get used to it however.
Onkyo 9070 a pleasure to listen too
Crutchfield Customer Review (What's this?)
The sounds from this unit are nothing short of amazing! I have logged in 90 hours of listening in the two weeks since it arrived. Ran the Stereophole test discs and was especially impressed with the sound stage demo and guitar track details. I have used these before with other amps and there was just so more presence, imaging and detail. With streaming media digital inputs there was no need for new speakers with this amp. It brought out the best in them despite their age.
Pros: Separate DAC for R and L channels No hum or noise during silent track segments Massive transformers this amp weighs almost 50 pounds Life like vocal and instrumental sounds Many connection and functionality options provided
Cons: The unit runs a little hot (94F) but very stable if ventilation is proper (12 " clearance on top is a lot in a rack)
Onkoyo stereo amp A 9070
This high quality stereo amp has its own worth. High gear amp with clarity. Punch is solid. This product has great value for serious music lovers.
This is a great sounding receiver that doesn't seem to be getting much attention. It's a modern version of older "built like tank" amps of the 70's. Do a Google image search and take a look inside. It's got a massive transformer, huge heat sinks, and big capacitors. Then take a look at the power supply and heat sinks of other amps claiming 75 W per channel (8 ohms). This unit has a bigger power supply for 2 channels than most have for 7 channels! I was almost going to buy a two channel receiver from a different "high end" brand that was also rated at 75 W. Then I noticed that the Onkyo is over TWICE AS HEAVY as the other one. After taking a look inside I found out why. Oh yeah, the Onkyo also sounds better.
Pros: -Great sound -EXCELLENT DAC -Huge power supply
Cons: As always, quality comes with a price.
What's in the box?
- Integrated stereo amplifier
- 6' AC power cord
- Remote control (RC-830S)
- 2 "AAA" batteries
- Instruction Manual (En)
- Instruction Manual (Fr/Sp)
- Product Registration/Warranty Information
Features and Specs
|Watts RMS per Channel (8-ohms)||75|
|Watts RMS per Channel (6-ohms)||Not given|
|Watts RMS per Channel (4-ohms)||140|
|Minimum Impedance||4 ohms|
|Signal to Noise Ratio||107|
|Digital Music Features|
|Built-in DAC (Digital to Analog Converter)||Yes|
|High-resolution Audio Playback||No|
|Total Analog Inputs||4|
|Optical Digital Inputs||1|
|Coaxial Digital Inputs||2|
|Dimensions and Warranty|
|Parts Warranty||2 Years|
|Labor Warranty||2 Years|
Integrated Stereo Amplifier: The Onkyo A-9070 features a 2-channel amplifier rated at 75 watts (into 8-ohms, at 20-20k, with 0.05%, driving 2 channels) or 140 watts (into 4-ohms, at 20-20k, with 0.05%, driving 2 channels).
Push-Pull Design (with 3-Stage Inverted Darlington Circuitry): The Onkyo A-9070 integrated amplifier employs an efficient push-pull amplification design. This push-pull amplification design uses different transistors on each channel to separately amplify the positive & negative halves of the waveform. Meanwhile, 3-Stage Inverted Darlington Circuitry helps reduce distortion at the output stage. Together with the push-pull amplifier design, the 3-stage inverted Darlington Circuitry shapes a clean, consistent signal to send to the outputs for ultra-low distortion & greater sound quality.
AWRAT (Advanced Wide Range Amp Technology): Onkyo's advanced AWRAT design for power amplification comprises the following technologies to ensure optimal audio performance..
- DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry): Since the advent of digital audio, signal-to-noise ratios have improved dramatically. However, the S/N ratio reflects static noise only, and takes no account of another type of noise that occurs as the byproduct of sound reproduction; dynamic noise. To reduce this type of noise, Onkyo has developed DIDRC technology. 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 of the original sound. By improving linearity and reducing distortion in the super-high frequency range, Onkyo's new DIDRC technology effectively reduces perceptible noise and delivers clearer, truer audio.
- Low NFB (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 NFB.
- Closed Ground-Loop Circuits: AWRAT amplifiers employ 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.
- HICC (High Instantaneous-Current Capability): HICC enables an AWRAT 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.
- Symmetrical Twin-Monaural Construction: Power devices for the left and right channels of an AWRAT amplifier is 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.
New Circuit Board Construction w/ Internal Struts to Reduce Vibration: Rather than being directly connected to the chassis base, the circuit boards inside the A-9070 are cushioned by internal struts and affixed to the front, side, and rear panels. This method of construction prevents vibrations from the chassis from adversely affecting the circuit boards
Dual Wolfson 24-bit/192kHz DACs: High-quality Wolfson DACs work to optimize analog audio performance on the A-9070. The integrated amp features dual 24-bit WM8742 DACs, which support sampling rates of up to 192 kHz. Although these DACs are specified to handle two-channel audio on a single chip, Onkyo employs separate chips for each stereo channel to ensure the most accurate digital-to-analog conversion.
PLL Ultra-Low Jitter Technology: Jitter is an unwanted side-effect of the digital-to-analog conversion process caused by fluctuations in the time domain of a digital signal. PLL ultra-low jitter technology reduces jitter by comparing the input and output phases of the digital signal and creating an accurate clock waveform. This enhances the precision of digital signal processing and noticeably improves perceived audio quality.
Optimum Gain Volume Circuitry: Conventional volume-attenuation methods involve initially dropping a signal close to the amplifier's natural noise floor at low volumes. The signal can then become tainted with noise, which subsequently gets amplified along with the signal. Onkyo's Optimum Gain Volume Control Circuitry adjusts the gain so that less than half the typical amount of attenuation is necessary. The signal never comes close to the noise floor, and the result is noticeably clearer sound when compared to conventional amplifier designs.
Phase Matching Bass Technology: From the warm low notes produced by a cello to the deep frequencies of electronic music, a good audio system should be able to deliver plenty of bass response. While many bass enhancement circuitries effectively boost low-frequency sound, they are often prone to the effects of phase shifting, which can overwhelm mid-range frequencies and muddy the sound. Onkyo's Phase-Matching Bass Boost Technology effectively preserves mid-range clarity-allowing vocals and strings to sound great; while maintaining a smooth, powerful bass response at all volume levels.
High Output Transformer: At the heart of this integrated amplifier, you'll find a power supply that can maintain or increase output power as required. Musically, this means that you'll have deep, powerful bass; wide-ranging dynamics; musical peaks that sound composed; and correct timbre and sound staging. The A-9070's high-output power transformer, four 15,000 μF capacitors, and low-impedance copper bus bars work in concert to enhance the power and fidelity of your audio sources.
Anti-Resonant Chassis: To prevent vibration, a 1.6mm anti-resonant chassis is used to isolate the audio signal from any interference during the amplification process. This rugged chassis is superbly finished with an aluminum front panel and volume control.
Independent Headphone Amplifier: The Onkyo A-9070 features a built-in, independent headphone amplifier and a front-panel 1/4" headphone jack. You can adjust the volume of the headphone amp independently from the integrated amp's main volume. You can adjust the headphone level from -12dB to + 12dB.
Four Discrete Amplifier Modes: At the turn of a knob, the Onkyo A-9070 can be configured to run in any one of four distinct modes. Depending on how you want to integrate it into your hi-fi system, you can use it as an integrated amp, as a power amp, or as a pre-amp. On top of that, you can also set up the A-9070 in split mode. This enables the pre-amp and power amp to work separately, so you can incorporate another device, such as an equalizer.
A/B Speaker Selector: You can choose to output sound from Speakers A, Speakers B or both Speakers A &B.
Tone Control: You can independently adjust the Bass (100Hz) and Treble (10kHz) of the Onkyo A-9070 from -14 to +14 dB; as well as adjust the balance of the left and right speakers.
Direct Mode: By bypassing the tone control circuit, the Direct Mode uses the shortest path for enhanced sound quality. Also, since the left/right balance setting doesn't affect the sound quality, the balance can still be adjusted even if the Direct Mode is enabled.
De-Emphasis Function: When a signal treated for treble emphasis (pre-emphasis) is detected, the integrated amplifier is designed to restore the original signal characteristics via the "de-emphasis" process. This function only applies to the following digital audio sampling rates - 32kHz, 44.1kHz, & 48kHz (other sampling rates are not supported).
Auto Standby: When the Auto Standby function is activated, the integrated amplifier will automatically enter Standby mode if there is no operation and no audio signal input for 30 minutes.
Remote Control: The Onkyo A-9070 includes an IR remote control for wireless operation of the integrated amplifier and RI-connected Onkyo components.
RI (Remote Interactive) Control: Onkyo's RI system lets you operate multiple RI-compatible Onkyo audio components through a single remote control. On the rear-panel of the A-9070, you'll find two RI ports (3.5mm) to link another Onkyo component (such as a CD player, iPod dock, or tuner), enabling limited control of your setup using the integrated amp's remote.
- Auto Power On: When you start playback of an Onkyo component connected via RI while the integrated amplifier is in Standby mode, the integrated amp will automatically turn on and select that component as the input source.
- Direct Change: When playback is started from an Onkyo component connected via RI, the integrated amp automatically selects that component as the input source.
- Remote Control: You can use the integrated amp's remote control to operate your RI connected Onkyo components by pointing the remote at the integrated amplifier's remote control sensor instead of the component.
- System Off: When you turn off the integrated amplifier, your RI connected Onkyo components will turn off automatically.
3 Digital Audio Inputs: The A-9070 features a 24-bit/96kHz optical (toslink) input and dual 24-bit/192kHz coaxial (RCA) inputs that can carry digital audio signals from source devices (such as a computer or laptop) for processing by the integrated amp's dual Wolfson 24-bit/192 kHz DACs. The digital inputs do not support multichannel audio signal; PCM signal only.
- Optical Input's Compatible Sampling Rates: 32kHz, 44.1kHz, 48kHz, 88.2kHz, & 96kHz
- Coaxial Input's Compatible Sampling Rates: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, & 192kHz
4 Analog Audio Inputs/1 Output: The Onkyo integrated amp offers 4 analog audio inputs; which include 3 gold-plated RCA inputs and 1 gold-plated Phono input (MM/MC). There is also a stereo RCA line-output for connecting a recording device.
Note: You can change the name of the currently selected analog or digital input (not Phono input). Choose from CD, SACD, MD, Tape, Tuner, TV, Game, PC, or Dock. You can also hide the display of inputs that are not being used.
Main In Jacks: The stereo RCA Main Input jacks allow you to connect an equalizer or preamplifier to the Onkyo A-9070.
Speaker A/B Terminals: The Onkyo A-9070 is equipped with A & B speaker terminals to connect up to two pair of speakers. The receiver uses gold-plated binding post connectors for the A & B speaker outputs. The binding posts are not 5-way because a plastic collar prevents their use with spade lugs; they will accept bare wire (up to 10AWG), pin connectors, single banana plugs, and dual banana plugs. You can output sound to only Speaker A, only Speaker B, or both A & B Speaker. You can also choose to bi-wire a single of pair of speaker using the integrated amp's A &B speaker terminals. This provides improved bass and treble performance.
Note: If you are connecting only one pair of speakers, you can use speakers with an impedance of 4- to 16-ohm. If you are connecting two pair of speakers, you can use speakers with an impedance of 8- to 16-ohm.
Preamp Outputs: The A-9070's gold-plated stereo preamp outputs allow you to connect the integrated amplifier to a power amp, so it can be used as a preamplifier.
1/4" Headphone Jack: The A-9070 is fitted with a front-panel 1/4" headphone jack to connect a set of headphones for private listening. While headphones are connected, no sound is output from the integrated amplifier's speaker terminals or preamp outputs.
RI Remote Control Jacks: The two 1/8" RI remote control jacks allow you to connect this receiver to other compatible Onkyo components.
Detachable AC Power Cord: The A-9070 includes a detachable 6' AC power cord.