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Ken Ishiguro
Acoustic Revive

Position: Owner/designer

Place: interview conducted via the Internet,

translated to and from Japanese by Mr. Yoshi Hontai

Time: 15-27 March, 2013

Manufacturer’s website:

Interviewer: Wojciech Pacuła
Photos: Ken Ishiguro | Wojciech Pacuła

Published: 4. June 2013, No. 109

Wojciech Pacuła: How did Acoustic Revive start?
Ken Ishiguro: Acoustic Revive started in 1997 by launching RD-1 disc demagnetizer which was developed by me. Afterwards, Acoustic Revive developed audio accessories of every kind, and our products won many prizes such as Audio Excellence Award which is the highest award in Japan. For example, we won gold prize in the AEx accessory section 14 years in a row, and won gold prize in the cable section 8 times, including 5 years in a row. Now we feel proud that Acoustic Revive is No.1 accessory&cable brand in Japan.

What is the main idea behind Acoustic Revive and its main philosophy?
Our philosophy is that audio accessories must not change the sound; they can only remove noise and its adverse effects.
Our products remove bad factor such as noise or distortion, but do not spoil dynamics or sound energy. It means that the performance of audio equipment can be shown in 100%.

What is the most important thing an audiophile should start with in one's system?
A proper mental attitude is important, to not be deceived by a big change of sound. For example, emphasizing treble might give you the impression that the sound became fresh and treble more detailed.
Or you might interpret emphasized bass as richness and thickness of sound. However, emphasized high/low range might be just noise or distortion. If that is true, the original information is masked. In addition, some people sometimes take mistakenly such irritant and distorted treble for high resolution and plenty of information.
As we can understand easily in the case of video such as hi-vision or 4K, high resolution is not sharp/rough but is smooth.

How do you prioritize accessories, I mean, from the most to the least important?
I will come back to that question about priority later. Regarding the important accessory, all Acoustic Revive accessories are important. Audio problems are not solved only by one improvement somewhere. We can get ideal audio environment only by taking care of the whole such as cable, vibration, noise and room tuning in equal proportions. Of course, we can never get good sound only by using expensive equipments and speakers.

Why large audio manufacturers don't care about such improvements?
I think that audio equipment manufacturers and engineers are proud that their equipment is a main factor of sound improvement, and think that cable or accessories cannot significantly improve the sound; they can only change the sound at best.
Indeed, cables and accessories change the sound; moreover, truly superior cables or accessories can improve the sound. Even in the case of audio components, their sound changes not only due to different circuit designs but also due to the type of wiring, capacitors, resistors, casing design and its material, etc.

What could you advice an audiophile to start with?
Coming back to the priority of cables and accessories, in the case of cables we should change them from the top down. Regarding power cords, I suggest the following order: (1) wall outlet → power strip, (2) power distributor → CD player, (3) power strip → amplifier. We can compare electric current to water. If the upper stream is muddy, downstream is muddy too. Moreover, a “downstream” cable might emphasize flaws of “upper stream” cables.
Since cables are necessary in any audio system, unlike accessories, we should use good cables. Ideal cable is one without transmission deterioration, distortion, noise and sound coloration. It means a cable that does not change signal quality.
As to accessories, it is ideal to start with room tuning. But please note that room tuning might easily make things worse in terms of phase and feel. My suggested order of changes: (1) room tuning, (2) vibration control (boards, insulators), and (3) anti-noise measures.

How can we measure changes your accessories bring to the sound?
We can measure frequency characteristic by an analyzer, and can measure S/N ratio by latest spectrum analyzers. However, the best measuring instrument is the human ear. Only the human ear can perceive music feel or timbre. We should listen not only to audio equipment but also to live performances, and should appreciate wonderful pictures or read books to refine our sensibility.

Manufacturers of audio accessories are often accused of selling snake oil. You, however, from the beginning cooperate with technical universities. Could you give us an example?
Acoustic Revive cooperates with Faculty of Engineering, Gunma University. For example, the following analysis was done by Gunma University. (see HERE).
I think that changes in sound should be proved scientifically as much as possible. Also in the case of audio equipment, the size of sound changes brought about by different material and structure should be verified scientifically. However, because we need considerable amount of money for a university collaborative research, I think that a joined effort by the whole audio industry is necessary.

What do you think about the future of CD format, if there is any “future”? And what about the “old” high-resolution formats – SACD and DVD-Audio?
Like vinyl, the CD format may also continue as a minority. The sales of SACDs and DVD-AUDIO decrease. I think the reason is that no audio equipment to pull out maximum performance of SACD and DVD-AUDIO has been developed.
The reason why the CD sound quality improved rapidly is that CD data can be sent from the transport to the D/A converter made by another company by digital-link such as SPDIF and AES/EBU. And there are many companies able to develop high quality components of that type, which increases competitiveness. On the other hand, SONY did not allow that with SACD and that seems to have delayed its development.
DVD-AUDIO needs 5.1ch home-theater environment. And because a display output from DVD player is necessary to operate, it seems not to have spread as pure audio.
In fact, there was no SACD or DVD-AUDIO player exceeding highest separated CD players in sound quality. But recently, dCS flagship SACD system has been launched which exceeds the highest separated CD players. It is good news for audio industry and SACD.

Do you think that audio files will replace the CD format?
Distribution by means of Internet should become widespread, and files (data) should become main audio source. However, CDs and SACDs will not disappear because there are people who need a tangible object. Some people feel attracted by a package decoration, and some people do not feel the pride of ownership of intangible objects. Since vinyl era, covers have often been attractive as the work art. If CD and SACD covers have similar attraction in the future, disc source will survive by the artistry. Moreover, some people may feel uncomfortable operating a PC or a network player, and may stop listen to music.

What about Long Play – is this the best options now?
LP should continue to be an indispensable audio source, since analog record is supreme source for audio reproduction. As you know, the sound signal is analog waveform. But digital sources must change analog signal into digital. Though there are some difficulties such as scratch noise and maintenance, analog record is far superior at this point. In fact, the sound of analog record is superior in natural feeling and vitality.
The highest quality digital source is DSD 5.6MHz file at present. This seems to promise high possibility, but because such files practically mean offering master sound source quality, major record labels and major artists must refuse to sell them. Also in this respect, I hope that more companies launch supreme SACD players like dCS, and SACD will spread.

Please describe your audio systems – from what I know, you have more than one.
Indeed, I have six permanent systems…

Main system A

  • Speakers: AVALON Diamond | SP Cable: A Revive SPC-2.0PA
  • Power amp: VIOLA BRAVO | Cable: A Revive XLR-5.0PAII
  • DA convertor: GOLDMUND MIMESIS 21 E | Digital Cable: A Revive DSIX-1.0PA
  • Digital Preamp: GOLDMUND MIMESIS 24 ME | Digital Cable: A Revive DSIX-1.0BPAII
  • CD transport: Burmester 979
  • Analog Player: ROKSAN TMS + GRAHAM MODEL2.2 | Cartridge: LYLA TITAN custom-made (2017S duralumin body) STEREO + MONO | Phono cable: A Revive PHONO-1.2PA | Phono-equalizer amp: CONNOISSEUR 4.0 ADVANCE | Cables: A. Revive RCA-1.0PA
  • All Power Cables: POWER REFERENCE with RTP-ultimate and RAS-14 etc.

Main system B

  • Speakers: WESTLAKE BBSM15F | SP Cable: A Revive SPC-2.0PA 2pair
  • Power amp: PASS ALEPH2 4pcs (Bi-amp) | Cable: A Revive XLR-5.0PAII & RCA-1.0PA
  • Preamp: MARK LEVINSON LNP-2L | Cable: XLR-1.0PAII
  • DA Convertor: WADIA PRO | Digital Cable: DSIX-1.0PA BNC)
  • CD Transporter: WADIA21
  • Cartridge: LYLA TITAN custom-made (2017S duralumin body) STEREO MONO
  • Phono Cable: A Revive PHONO-1.2PA
  • Phono equalizer amp: GOLDMUND PH3
  • Cable: A Revive RCA-1.0PA
  • All Power Cables: POWER REFERENCE with RTP-ultimate and RAS-14 etc

Home theater&Multi-channel system

  • Main Speakers: B&W 802D 2pcs.
  • Center Speaker: B&W HTM2D
  • Rear Speakers: B&W 803D 2pcs.
  • Subwoofer: B&W ASW15
  • SP Cables: A Revive SPC-2.0PA
  • Power amp: GOLDMUND 18.4ME 5pcs.
  • Digital Cables: Acoustic Revive DSIX-1.0PA 6pcs (All digital link)
  • AV(Digital) Preamp: GOLDMUND MIMESIS 30 ME
  • Digital Cable: Acoustic Revive DSIX-1.0PA & Analog Interconnect Cable: Acoustic Revive RCA-1.0PA 6pcs.
  • Blu-ray(Universal) Player: DENON DVD-A1UD
  • Projector: MITSUBISHI 2001(three beam projector)
  • Power cords: Acoustic Revive POWER REFERENCE + Acoustic Revive RTP-ultimate and RAS-14 power strip

PC&Network Audio system

  • Speakers: ACOUSTIC ENERGY AE2SIGNATURE | SP Cable: Acoustic Revive SPC-2.0PA
  • Power amp: McCINTOSH MC602 | Cable: Acoustic Revive XLR-1.0PAII
  • Preamp: JEFF ROLAND CAPRI S II | Cable: Acoustic Revive RCA-1.0PA&XLR-1.0PAII
  • DA Convertor: RME UCX UFX etc | Clock Cable: Acoustic Revive COX-1.0PA BNC | Digital Cable: Acoustic Revive USB-1.0SPS with RUI-1
  • Word Clock: GPS Rubidium | in LAN channel: Acoustic Revive LAN-1.0PA with Acoustic Revive RLI-1 and Acoustic Revive RLT-1
  • All Power Cables: Acoustic Revive POWER REFERENCE

Living Room system

  • Speaker: SONUS FARBER SIGNAM | SP Cable: Acoustic Revive SPC-5.0PA 2pair Bi-wired
  • Pre-main amp: SONUS FARBER MUSICA | Cable: Acoustic Revive RCA-1.0PA
  • All Power Cables: Acoustic Revive POWER REFERENCE

Bedroom system

  • Speakers: Everything But The Box | SP Cable: Acoustic Revive SPC-2.0PA
  • Pre-main amp: AUDIO ANALOG PRIMO | Cables: Acoustic Revive RCA-1.0PA
  • CD Player: AUDIO ANALOG CDP2.0
  • Acoustic Revive RTP-2ultimate and Acoustic Revive POWER REFERENCE