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Our Amplification Philosophy:

Onkyo’s amplification philosophy focuses on capturing the energy and dynamism contained in the audio signal and reproducing it without loss.

Why is Dynamic Audio Amplification Important?

Audio signals are not static like a test tone, but rather a countless collection of constantly moving waves. While static measurements such as S/N ratio and Total Harmonic Distortion are important, Onkyo believes that excellent dynamic and transient response is the key to emotionally involving sound. Dynamism—the “life” in music—is achieved when the amp can respond to changes in the signal instantaneously, so notes start and stop naturally and the nuances in attack, decay, sustain, and release are voiced with conviction.

How We Achieve Dynamic Audio Amplification:

Hi-Current Amp Design

Onkyo home theater receivers represent the culmination of almost 70 years’ experience in amplifier design. The unique elements of our amplification system comprise high-current, low-impedance architecture to accurately control large speaker cones while enabling instantaneous response to dynamic changes, and discrete wide-range amplifier circuit topology to eliminate phase shift for clear and accurate audio imaging.

High Current Comparison

High Current Comparison Image

The above chart shows current (vertical axis) versus time (horizontal axis). A bigger fluctuation represents higher current output, and as you can see, Onkyo delivers current well in excess of competitive products. Current grips the speaker cones and controls their movement. More current means the drivers produce sound that more closely matches the original input signal. Less distortion, better control, faster response, more realistic sound.

More Current to Drive Bigger Speakers

More Current to Drive Bigger Speakers Image

A/V receivers with high-current capability can easily drive speakers with larger woofer cones. Without high current flow to control the cone, accuracy is sacrificed. Onkyo A/V receivers produce less distortion when driving larger speakers than comparable products without loss in accuracy.

How is the Sound Different?

How is the Sound Different? Image

High current from the amplifier extends the speaker diaphragm’s range of movement inwards and outwards so it can reproduce a wider spectrum of dynamic information contained within the signal with greater accuracy. This improves your speakers’ ability to reproduce subtle details and textures.

Combining Power and Current for Ultimate Performance

Combining Power and Current for Ultimate Performance Image

A car with lots of power will not necessarily be a joy to drive. It also has to handle: braking, cornering, and smoothness are as important as outright horsepower. It’s the same with amplifiers. Watts deliver loudness, but it’s current that delivers the detail and dynamism in sound. If your amplifier does not produce enough current, your speakers will not perform to their fullest potential, and you’ll miss out on a fully immersive sonic experience.

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Non-Phase-Shift Amp for Realistic Audio Imaging

Onkyo’s Wide Range Amp Technology (WRAT) circuit layout prevents phase shifting by pushing the roll-off point higher than the listening-level frequency. Amplifying sound without phase shift creates an uncommonly well-focused and realistic audio image.

What Happens If Phase is Not Accurate?

What Happens If Phase is Not Accurate? Image

If phase shift occurs and signal timing is not accurate, then neither is the resulting audio image. It is like playing a guitar with a warped neck—each note is misaligned and the sound image is distorted.

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Noiseless Audio Processing with VLSC™

Onkyo’s Vector Linear Shaping Circuitry (VLSC) reassembles the signal in its original form following digital-to-analog conversion. Unlike conventional filters, VLSC completely removes electrical pulse-noise generated during this process, allowing the soundwave to be amplified with exceptional fidelity.

What’s the Advantage?

What’s the Advantage? Image

Pulse noise arises as an inevitable consequence of converting a digital audio signal into an analog signal. This high-frequency distortion can veil the audio image. By comparing the input signal to the outgoing signal, VLSC is able to regenerate the original signal so the amplified signal is the same as what was captured on the recording.

How Does VLSC™ Work?

How Does VLSC Work? Image

The accompanying diagram describes how VLSC works:

(1) Input signal gets converted from digital to analog
(2) Output signal contains pulse noise (digital noise)
(3) VLSC reshapes the signal by generating an original signal line (vector) by looking at the original signal and comparing it to the one containing pulse noise
(4) The circuit then filters out the pulse noise and outputs a signal that very closely resembles the original.

Comparison to Conventional Filters

Comparison to Conventional Filters Image

The digital input signal is converted to an analog signal by the DAC. It then passes through filters. Conventional filters cannot completely remove pulse noise, and this processing distortion is amplified together with the original signal, compromising sound quality.

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