Component Selection Guide

We will explain the combination of our products according to the customer’s application. Also we explain the new digital-to-analog conversion (D/A processor) that is the core of these products.

Recommended system for listening to CDs

CD player ― Digital beyond digital.

To expand the music hidden in digital sound sources to a more pleasant sound, we have developed a new digital-to-analog conversion “D/A processor”. Digital sound quality that has been difficult to solve so far has been overcome, and a natural sound space close to high-quality analog records can be obtained.

Amplifier ― The amplifier that makes sound lightly follows any music.

Amplifier section adopts a little configuration of simple amplifier stage as much as possible, is the highest priority on freshness of the sound more than anything. Sound quality with open and natural sounding and a sense of speed, you will forget the existence of the audio equipment. Ultra-wideband compatible with our new D/A processor.

Loudspeakers ― The simpler you can hear the natural sound.

Reproduces the natural sound space that is unique to full-range speakers, ranging from bass to treble. If you can express your music with a simple full-range, you don’t need a complicated system such as 2-way or 3-way.

Cables ― A highway that connects devices.

Electrically and musically considered cables can maximize the performance of the equipment. We have original products, such as analog line cables, digital cables and loudspeaker cables.

More musically your system

Newly designed D/A processor ― Digital beyond digital.

To expand the music hidden in digital sound sources to a more pleasant sound, we have developed a new digital-to-analog conversion “D/A processor”. Digital sound quality that has been difficult to solve so far has been overcome, and a natural sound space close to high-quality analog records can be obtained. Since the main unit is an I2S input, if you change only the conversion adapter such as coaxial, USB, optical fiber, etc., this single unit can support various music sources.

CD transport that outputs I2S ― Realizes more ideal digital transmission.

CD transport that supports I2S output and can be directly connected to a newly designed 16-bit D/A processor. A dedicated connection cable is also available.

What is the newly designed D/A processor?

Why are we not satisfied with the sound quality of CDs?

Many of us have the following impressions when listening to digital sound sources on CDs and computers.

To tell the truth, these symptoms have a common cause. This is because music-related information is lost or altered in the process of converting analog to digital during recording and returning digital to analog during playback. The human brain instinctively stresses unnatural sounds and no longer accepts it as music. To solve this problem, a new method for creating a more natural sound for playing digital sound sources is required. That is the new 16-bit “D/A processor”.

DAC chip is used only as a switch ― Improve sound perspective and musical expression.

16-bit non-oversampling DAC plays the CD format as it is. In the D/A processor, the DAC chip is used only as a switch that follows the digital signal, and the analog signal is obtained directly by driving it with an external current source dedicated to the left and right independent analog circuits. As a result, sound perspective has been stabilized, and a precise and thick musical expression has been improved.

Overtone component phase correction ― Reproduce the playback sound unique to the instrument.

Concerto waveform (yellow: before correction, green: after correction):
Emphasized in the part with many overtone components.

In order to eliminate the phase distortion peculiar to digital, the phase correction is performed so that it becomes a harmonic overtone component from low to high. Although it is hard to imagine from the change in the waveform, the actual piano sound, the guitar string repelling sound, the violin rubbing sound, etc., have become unprecedented vivid and unique analog-like reproduction sounds of instruments. The accompaniment that tends to be hidden behind the vocals, and each part of the orchestra can be heard clearly, so the three-dimensional sound space that has never been experienced is reproduced in the listening room.

Added super high frequency harmonics ― Digital beyond digital.

Clarinet waveform and spectrum: Higher harmonic components are generated up to ultra high frequencies.
The overtones surrounded in blue are not originally included in the CD.

The super high frequency that is inherently included in the sound space where musical tone resonate cannot be heard by human ears, but it is still necessary to reproduce the feeling of air. A semiconductor circuit with the characteristics of a triode vacuum tube adds a harmonic overtone component that is missing in digitalization, and a natural sound space close to a high-quality analog record can be obtained with a pleasant sound. It features a warm musical sound that gives listeners a serenity of mind that they want to listen to forever.

For the technical background of this product, including the development history of the “D/A processor engine” that begins with research on phase distortion peculiar to digital, see “16-bit Reconsideration and New Approach” on the “Technology” page.
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