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A-9150 Integrated Amplifier

Onkyo A-9150
Integrated Amplifier

Refined Power Amplification Circuitry
with Discrete SpectraModule

Robust Flat Chassis

Dedicated MM/MC Circut Board
and High Quality Discrete Head Amp

Quality Audio Terminals

High Current Power Supply

DIDRC Filter Prevents Ultra–high–frequency
Distortion Affecting Audible Sound

Natural Music Reproduction with Hi–Grade
DAC and DIDRC Filter

4 Gold–plated analog RCA inputs

Refined Power Amplification

In order to deliver a clear and comfortable audio image, it’s vital that sounds of different frequencies arrive at the listening position simultaneously. Power ampliflication circuts feature original topology that’s carefully tuned for phase accuracy, wide–spectrum signal reproduction, and natural transient response. Fitted with hand–selected audio–grade parts, the amplifier contributes to lifelike and involving sound quality.

Discrete SpectraModule boasts a slew rate of over 500V/μs, significantly higher than competitive products that use a standard IC chip. High–voltage performance enables flat linearity into the megahertz range for full–bandwidth signal reproduction. This is important not only for natural transients expressing the nuances in music with freshness and vitality, but also for accurate definition of instruments ranged around a larger and more realistic soundstage.

The A-9150 makes your records sound better than ever. A gold—plated phono input supports signals form either MM or MC cartridges fitted to your choice of turntable. Separate phono circut board has dedicated equalizers served by a top–quality customized head amp, which operates in discrete configuration for MC signals. Together with analog power amplification, this high–grade phono input design expresses the depth and vitality of music on vinyl.

Current has influence on sound quality. High current is required for a better grip on the speaker transduscers, improving control and accuracy. A customized high–output transformer and two huge custom capacitors inside the A-9150 deliver current through discrete output–stage transitors that are kept cool by an aluminum heat sink. Speakers react instantly, with throw–range precisely controlled for accurate articulation even through dynamic and complex musical passages.

DIDRC Filter and Hi–Grade DAC for Natural Sound

Distortion in the ulta–high frequency spectrum can have a noticeable impact on the character of audible sound. Even the best D/A converters introduce some noise to the signal, and that noise is amplified, distorting the sound you hear. DIDRC Filter completely erases ulta–high–frequency noise. Performance is optimized for digital music with an undistorted frequency response extending far above the range of audibility. Combined with a premium 768kHz/32–bit DAC, you can enjoy a greater sense of realism from digital sources with none of the unnatural "synthesized" feeling sometimes produced by digital processing.

Solid Build with High–Grade Terminals

A peek under the hood tells you what to expect from the A-9150. Held in place by a flat chassis that tames resonance, the digital audio board is isolated form the analog circutry. L/R channels are symmetrical to equalize signal path–lengths and minimize stereo playback errors. Coaxial digital inputs, phono input, speaker posts, and RCA line inputs are gold–plated and of excellent quality. Finished with an aluminum front panel and volume control, the A-9150 presents as a component built to last.


Power Output

4 ohms

2 x 60W/ch

High–Current Low–Impedance Drive

Audio In/Out


Phono input


DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry)

Refined Power Amplification Circuitry with Discrete SpectraModule

192kHz/24–Bit HD Audio Playback via Coaxial

Tone control (Bass, Treble, Balance)

AKM (AK4452) 768kHz/32–bit Digital–to–Analog Converter

Two Hi–Grade Customized Capacitors

4 Digital Audio Inputs (2 optical and 2 coaxial)

5 Analog Audio Inputs and 2 Outputs

(4 Line In, 1 main In – 1 Pre–Out, 1 Line Out)

Customized, Gold–Plated, Banana Plug–Compatible

Machined, Gold–Plated RCA and Phono Terminals

Amplifier Section

Power Output

60W/ch (4 ohms,20Hz–20kHz, 0.08%THD, 2 Channels Driven, FTC)

Total Harmonic Distortion + Noise

0.08% (20Hz–20kHz, Rated Power)

Input Sensitivity and Impedance


200 mV/220 k–Ohms

Phono MM

4.0 mV/47 k–Ohms

Phono MC

0.4 mV/120 Ohms

Output Level and Impedance

RC Output

0.2 V/2.3 k–Ohms (Line Out)

Phono Overload (MM)

70 mV (1 kHz, 0.5%)

Phono Overload (MC)

7 mV (1 kHz, 0.5%)

Frequency Response

10Hz–100kHz/+1 dB, -3dB(Line 1, Direct)

Tone Control


+/- 10dB, 100Hz


+/- 10dB, 10khz

Signal–to–Noise Ratio

107 dB(Line1, IHF-A), 82 dB(Phono MM, IHF-A), 73 dB(Phone MC, IHF-A)

Speaker Impedance

4 ohms–16 ohms (A or B), 8 ohms–16 ohms (A +B)


Power Supply

AC 120 V~, 60 Hz

No Sound Power Consumption


Power Consumption


Standby Power Consumption


Dimensions (WxHxD)

17 1/8” x 5 1/2” x 13 1/16” (435 x 139 x 331 mm)


20.3 lbs (9.2 kg)