The BRi-PSM01 series has tried to improve sound quality by reducing noise and smoothing switching AC adaptors and transformer AC adaptors, but fundamentally noise can only be reduced.
We felt that the only way to achieve the true performance of DC input devices was to use a power supply that outputs DC directly from AC.
We have developed the PSM01 series for the filter section and adopted the conventional method of stabilising the DC voltage with a toroidal transformer with low magnetic flux leakage, an SBD bridge and a linear regulator to provide powerful noise reduction and power smoothing.
Basically, the design concept of the PSM01 series is inherited.

• To reproduce the subtlety and reproducibility of AKM DACs (and other DACs) To reproduce all sounds, but to be able to listen to the music comfortably as a whole, and to be able to feel the melody of parts and instruments when listening with an awareness of the parts To reproduce the subtlety of string instruments, the feeling of playing live piano, the afterglow of a hall performance, and the quality of mixing To make the most of the subtlety of AKM DACs, which reproduce the quality of the mixing, the feel of a live piano performance and the reverberations of a hall performance.
• No unnecessary colouring.
  The aim is to reproduce the original sound and not to add unnatural resonance or brilliance to cymbals and other instruments in the treble range.
  No unnecessary undulations in the low, mid and high frequencies, and a flat soundstage.
  Do not cheat in the high-resolution range (above 20KHz).
• Realises the best of both worlds: low noise and low rivulets due to the large smoothing capacity of linear power supplies and the responsiveness of switching power supplies.
  When a linear power supply increases the smoothing capacity and reduces the voltage wave, the response speed is inevitably reduced and the rise time of the sound becomes longer. Switching power supplies have a faster rise time and better reproducibility of sound, but they cannot prevent the generation of switching noise (tens of KHz to MHz).
  Although costly, large-capacity smoothing and high-speed response are ensured by placing multiple audio capacitors and small-capacity solid polymer capacitors in the right places in the right places.

It is distributed as a linear power supply that can be customised by selecting two voltages close to the output of 5-15V.
(The image shows the prototype LPS01EX LE.)