20206/04 BRi-PSM02-FR

To be used between the A32-II (Chinese linear power supply) and the clock
Excerpt from siina’s note (with permission)
(Link to the full text at the end)

It’s used in exactly the same way as the standard DC filters from FX-Audio—simply clip it onto the DC cable. You can add a case for 1,000 yen, but believe it or not, this case is actually 3D-printed.

　The BRi-PSM series comes in several variants, including models designed specifically for linear power supplies and others compatible with switching power supplies. This product range once again caters to niche requirements, eliminating not only noise from linear power supplies but also the rubbish-like waveform noise associated with switching power supplies. Apparently, my 02-FR is the flagship model designed exclusively for linear power supplies.

So, as for the sound quality...

　Blimey, you’d never guess that sound came from a bloody linear power supply.

　It’s a complete turnaround from the sluggish pace of a middle-aged man running a marathon, gasping for breath—now it’s transformed into a powerful response and smooth sound output… The source? The clock!! Wait, why on earth does the sound change so much just because of the power supply to the clock? I don’t know anything about audio…

　Once the power is cut off, the sound quality of the clock deteriorates terribly; in particular, when it cools down, the sound becomes a real mess. So I want to avoid cutting the power as much as possible. In other words, if I remove it to fit a filter, the sound will be rubbish for a while... but with the PSM, I was amazed that it sounded decent the moment I fitted it.

　What’s more, it just gets better and better with time. Whilst breaking in is necessary and important, the quality of audio equipment is almost entirely determined by that very first impression—and that rarely changes. If the initial sound is poor, it’s highly unlikely that the assessment will be reversed; however, that is not the case here—it sounds good right from the start and is reliable.

　Not only has the response improved dramatically, but the sound is smooth, with a delightful transformation reminiscent of installing a linear power supply… How can a simple DC filter costing around 13,200 JPY bring about such a change?

　This is hardly surprising, as the BRi-PSM02 noise filter is virtually identical to the noise filter circuit found in the output stage of the manufacturer’s linear power supply, the BRi-LPS.

　This product is based on the philosophy that even a rubbish linear power supply can be made to work to some extent if you fit a high-quality, high-precision filter downstream… Naturally, as it caters to all kinds of specifications, it can also be customised. Even if you plug it into a switching power supply that’s a mass of rubbish noise, you’d probably get results like this. You won’t need an FX filter anymore; the BRi-PSM sorts out pretty much everything.

2026/04 BRi-PSM02-FR

When I placed it between the Sonore Optical Module and the Elsound linear power supply at the input of my audio system, the sound became clear and powerful.

In my setup, I use a Gustard R26 DAC in NOS mode; previously, I used an AET EVO1302S power cable with the R26, and—taking other components into account—the system as a whole tended to emphasise clarity.
After that, replacing the R26’s AC cable with an AET TSD-HP significantly improved the richness, resonance and sense of space in the sound, though in some instances it still felt a little flat.

After adding the BRi-PSM02-FR in that state and using it for a while longer to allow it to break in, that flatness began to fade, and the sound took on a sense of dynamism, with power, clarity and resonance coming together beautifully.
A particularly welcome change was that, rather than the sound simply becoming sharper, the overall clarity improved whilst the core of the sound and its sense of energy remained firmly intact.
The clarity and attack of the snare became more distinct, yet it did not veer towards sounding thin or harsh; rather, it gave the impression of being organised whilst retaining the music’s momentum.

In my setup, some noise-reduction accessories tend to tidy things up in a subtractive way, which can sometimes result in a slight loss of airiness or the natural decay of the sound; however, the BRi-PSM02-FR is different. I felt that it improved clarity and power in an additive way, without significantly compromising the subtle resonance or musical coherence.
Consequently, I was impressed not only by its effectiveness on its own, but also by the fact that it does not clash with improvements gained from other changes, such as switching power cables, making it easy to achieve a synergistic effect.

As a result, in my environment

• Mitigating flatness
• A return to vitality
• Improved strength
• Improved clarity
• Improvements to acoustics and spatial expression 

I can really feel the difference.
I found that this product does more than simply tighten the sound like a filter; it adds clarity and definition whilst preserving the music’s energy and natural resonance.

2026/02 BRi-PSM02-FR

Nichicon UKA 25V/6,800uF x 5 (34,000uF) + WIMA MKP2 0.1uF x 2 + Nichicon FPCAP RR7 16V 330uF x 8   With a total capacity of approximately 36,640uF (2,640uF), this is a game-changing component that completely transforms the power supply.
As the FX-Audio Petit-Tank LE uses solid-state capacitors rated at 25V/330μF × 8 (2,640μF), this is actually 14 times as much.
It is not merely a matter of high capacitance. By combining high-performance electrolytic and film capacitors, the circuit reduces noise across a wide frequency range whilst preventing oscillation, thereby ensuring stable operation.
The inclusion of a solid-state molecular capacitor not only provides the final touch in noise reduction, but also enhances resolution and dynamic range, boosts the sense of volume in the low frequencies, and improves bass response.
When you actually play some music, you’ll immediately notice that the bass is rich and comes from deep within. The high frequencies have also gained better clarity. What’s more, high-pitched sounds and consonants like ‘s’ and ‘ch’ are less likely to sound harsh.
Overall, the sound has become quieter, and the effect of drastically reduced noise is evident. The spatial presentation and soundstaging have also improved, resulting in a more three-dimensional and precise sound.
The direct retail price is 11,700 yen (including delivery within Japan) – a price that would buy you a Chinese linear power supply costing nearly four times less than an FX-Audio product. However, given the high-quality components and the sound design based on listening experience, which prioritise reliability and improved sound quality, this is hardly surprising.
However, as it would be difficult to use PSM02 for everything, I will use a PSM01 with a solid-state converter added for the modem and HGW.

2025/05 BRi-PSM02-FR (USB Output)

USB isolator (LHY AUDIO) ⇒ Fiio Q7 (DC mode) connection uses a USB cable with separate power signals (split), but when used with the power supply, the sound quality improved dramatically in all respects. I am very surprised.

Originally, I was using a mobile battery, but by switching to El Sound's linear power supply ⇒ BRi-PSM02-FR, it feels like a completely different product. There are no other products with this specification that allow direct USB connection of DC output, so I am truly glad we opted for this custom order (※).

※This is the first customer to request a USB A connector output, so it was a custom order, but future PSM02 models will offer the option of a DC plug (15cm) or a USB A connector (female).

2025/04 BRi-PSM02-FP/MP/MN

Immediately after installation there was a nervous side, but it calmed down after about two days. The equipment installed is a DD converter, a clock and an amplifier for the high frequency range.

There are lots of different accessories that can be attached to DC power supplies.
We have tried several manufacturers' products, but this product is by far the best. The sound level has been changed to a sound equivalent to that of a ¥10,000,000 product.
I am surprised and thank you very much. Thank you very much.
Please continue your products for a long time to come. I will support you.

2025/04 BRi-PSM02-MF

This time it is used for a Yamaha wired router.
The audible signal-to-noise ratio has been improved, the high frequency range is clear, and the music listening time is longer and more pleasant, which is a great effect.

2025/03 BRi-PSM02-FF

I removed the petit tank LE and listened to what I received. This is a change that is immediately apparent on listening.
The whole range is cooler, clearer in the high frequencies, no loudness, enhanced spatial expression.
Best of all: the finished sound is not self-indulgent, so anyone listening will be able to hear the sound honestly.
Overall: VERY GOOD!

El-Sound linear power supply 5 V → BRi-PSM02-FF → external power supply USB cable (*see below) → DAC → amplifier → headphones

External power supply USB cable UOC3-R
https://www.shop-jspcaudio.net/shopdetail/000000000144/

2025/02 BRi-PSM02-FF

El-Sound Linear Power Supplies
BRi-PSM02-FF
FiiO Q7 (DC mode)

I was happy with PSM01-F2N, but when I replaced it with PSM02-FF, there was a big change.

The soundstage is expanded up, down, left and right, and the focus seems to be perfectly aligned. I can also hear each sound in more detail and have made new discoveries.
The width of the dynamic range also seems to have increased.
As a result, the overall sound quality has improved significantly.
I am very satisfied.
Thank you again for a great product.

2025/01 BRi-PSM02-FN & BRi-PSM02-FF

Equipment used.

PC→HUB→SPEC RMP-UB1SFP→AUSE　NU-DDC→FIIO K11R2R→SMSL SH-X→KGSSHV CARBON→AUDEZE CRBN

HUB for this, FF for K11R2R and FN for NU-DDC.
Originally, all three of the above were using the BRi-PSM01-F from Burichan for analogue power supply.
Even in that state, I had no complaints at all because the dynamic range was several steps wider and not harsh than before I put in the BRi-PSM01-F, but both highs and lows had better extension.

But when I heard that a new model had been released, I couldn't stand still and asked for help.

The results are fantastic! That's one word for it... but it may not be enough to tell you what it's all about.

Firstly, in my personal experience up to now, when a high performance noise filter is used, the noise does indeed seem to disappear, but the sound tends to lose its liveliness and become either muffled or, on the contrary, edgy and harsh.
I do not feel those negatives at all.
There is a part of me that uses electrostatic headphones so that I don't feel those negatives, but with these, even dynamic headphones have no problem, on the contrary, the dynamic range is further expanded and the sound field is naturally expanded with a good sound separation, especially in the bass. The sound image is also very easy to recognise, and I can no longer go back to the original environment.

In truth, it would have been best to replace the power supply, but it was very easy to install as we already had a lot of analogue power supplies to switch from switching power supplies. Thank you very much.

2024/11 BRi-PSM02-FNC

BRi-PSM02-FN Custom Contents

• DC cable 30cm
• DC cable heat shrink tube (black)

The F2N, which was purchased in October, was included in the comparison.

<without noise filter>.
I have become accustomed to my F2N ears, so when I listen to them plain after a long time, there is a lot of clutter and I feel like I am listening to some kind of slow playback.
I would have had no complaints before, but I have become a luxurious ear.

<Petit Susie + Petit Tank>
The clutter has been removed and the music is now easy to listen to at once. It's not slow, but it doesn't sound fast and gentle.

<BRi-PSM01-F2N>
Transients are improved at once, each instrument is expressed realistically and a thrilling feeling is generated.
The clutter has been further removed and the sense of volume has increased, making it enjoyable to listen to music in a simple way.

<BRi-PSM02-FNC>
I liked the F2N so much that I asked to have it made with the desire to hear a better sound.
The volume is a little gentler than that of the F2N, which has been aged more vigorously.
Is a more mature sound the aim? I think the reason I don't feel inadequate is because the transient performance and the amount of information have increased further.
In orchestras, the resolution of wind and percussion instruments in the back rows has improved, and the expression of violins in the front rows has changed so that you can see the player's playing movements.

Round 2, Eva Cassidy True Colors (acoustic) to listen to
https://www.youtube.com/watch?v=Rka5vDLdHfA

<without noise filter>.
This blurriness somehow reminded me of VHS picture quality.

<Petit Susie + Petit Tank>
Improved DVD quality and much less sharpness of Eva's breath.

<BRi-PSM01-F2N>
As in the first round of listening, Eva's voice and guitar are at once more vivid here.

<BRi-PSM02-FNC>
I noticed that the intro guitar solo section also included a neck-squeaking sliding sound.
Eva's voice lost even more of its sharpness and became smoother, while the guitar lost its sweetness and became more taut.
The clarity of Eva's voice took over in the chorus section, and the guitar didn't just sound like a guitar.
The guitar has changed to a realistic expression that reminds us that the guitar sound is produced because the strings are being plucked.

In general, the detail information has increased significantly from the F2N, and I've been wanting to re-listen to various tracks as they age.