DMP-Z1 - Engineer Interview
https://www.sony.jp/feature/products/181101/
Featuring:
Mitsunori Tanaka Product planning
Tomoaki Sato Design project leader
Yoshihiro Matsuzaki Electricity and sound quality design
Hiroaki Sato Sound quality design leader
I totally agreed about Powersupply being a very important element. Virtually, every engineers, and enthusiasts would agree.
Yes, Ground would affect the sound quality ! Surely enough, and I understand that the Body of RK51 is customized to incorporate OFC goldplated body instead of brass as it typical RK50 do. I can’t say enough about how impressive Sony would have pulled this off. Anyways, AKM DAC is chosen because of the power consumption which is lower than ESS Sabre’s ES9038Pro. I know you want to convince people that AKM sound better, but the reality is power requirements. Ofcourse, there are people who prefer AKM Velvet signature rather than Sabre’s.
I am in awe that you don’t mention about the use of PET capacitors and Fine sound Resistor throughout of the devices. In fact, I think that this is the Most unique thing about Sony Z1, the ability to custom order different components to Sony specifications which is not existed for the mass market, case in point is RK51 as mentioned. The newly developed PET capacitors s known to be excellent for sound quality because it is not subjected to Piezoelectric effects (vibrations and oscilliations that self generate Jitters and inaccuracy), the problems that plagues many other devices that use Tantalum and SMD.
Yes, it was marvelous to learn that Battery is developed by Sony, and the design that universally and intelligently switching power sources as mentioned, and that you did catered about Noises, Noises and again...Noises: it could take the stock Wallwart, or an external Linear Power Supply, or completely relying on battery. At this specific dimensions, and to last 9 hours on battery is marvelous. But 4 hours charging to full isn’t anything impressive.
Now, the only 1 thing that I am disappointed is that there are no mentions about Oscilliators. Yes, you did mentioned about an all in one device that cut down so many other components in the chains such as a PC, Cables...etc....But, you skipped the most important things in Digital music reproductions clock oscilliators precision and it noises. This is like dodging the bullets here, and then the next Bullet that you also dodged is the uses of intergrated TPA Headphones amplification chip. I would say that every engineers and enthusiast would agree that discrete components and built Amplification stages for headphones amps would be just
as important as a good power supply.
Yes, maybe Sony need an excuse to improve in the next iteration of their Walkman, or Flagship signatures. However, at the price point of $8,000, the excuses should not be from the designs, or device capabilities. That means the clock oscilliators have to be at it most highest precision in the industry, and the discrete design of the amplification stages should also be the industry highest. In fact, at this price point, the only excuse you can rely on is
innovations and creativities, but not technical capabilities and designs.
Ok, I am done ranting.