AK4493S / AK4490R Advanced VELVET SOUND Technology

Developer's Interview

(Nakamoto)

The "S" in the part number AK4493S stands for "Superior," and the "R" in AK4490R stands for "Rich." Both of these products are even closer than the original versions to the ideal of flawless original sound reproduction, and you can feel the evolution of our design technology when listening through them.

(Nakamoto)

First of all, we have changed the manufacturing process. This change could have led to degradation, but we turned it into an evolution. This was possible because in addition to our experience in audio circuit design, we have a deep understanding of semiconductor process technology.

(Nakamoto)

Let me elaborate upon two specific points of evolution.

The first is impedance. To put it in simple terms, you can compare impedance to the width of a road. You can increase the number of lanes, as you would on a highway, to improve the flow of the desired audio signal. For a noisier circuit, though, you'd want to make that road so narrow that you - or the noise, in this case - could barely walk through it. The AK4493S and AK4490R have been redesigned to optimize signal and noise path impedance, which achieves a dynamic and responsive sound while reducing unnecessary power consumption.  This optimization is integral to the evolution of VELVET SOUND.

The second point of evolution is our treatment of noise itself. There are many kinds of noise, some peculiar and grating, and some that is not as unpleasant. Based upon our understanding of the character of different kinds of noise, we have changed the distribution of  noise drastically. So while the devices' noise specs are quantitatively unchanged, the audible noise characteristics are qualitatively even better than before, and the sound of the content itself is richer and more delicate, as well as more complete.

(Sato)

The AK4490R and AK4493S deliver a dynamic and responsive sound. In order to convey the atmosphere of a concert hall, playback must accurately reproduce the trailing sound that lingers at the end of every musical passage as the last note fades into silence. Our design methodology ensures that this crucial decay is faithfully expressed. 

(Nakamoto)

We are proud to present the AK4493S and the AK4490R. We hope you will experience the world of Velvet Sound's faithful re-creation of the original audio experience, just as it occurred when it was recorded.