I just bought the Lumin U2 Mini upgrade and LHY 50w liner power supply from Alwin, and used this helpful video to do the mods. Boy oh boy the improvements is astounding and worth the money. Thanks for the good support and fast delivery Alwin.

Okay people, so I bought this and it took me a while but I installed it. Result on MY system (mid-highend) was outstanding! The soundstage is deeper, (obviously so) and wider, there is much more separation of the instruments, and the whole presentation is quieter than before. Well worth the upgrade of my Lumin U2 Mini. However here are some alterations for the install: 1. Don't clip the one red wire from the switch to the plug: take a soldering gun and apply some heat and then slip it off. (easy-peasy) 2. Buy 6 3mm nuts and washers so that you may place the screws back in the chassis so that there are no dust holes 3. Since the screws are now in their proper holes again, get something to mount the internal board about 6mm off the bottom of the case to clear the screws. Notes: A week later I am still pulling my head up / opening my eyes because I hear sounds more prominently than before (or didn't hear before). I think I am in the upper percentage of people who hear such a difference... but I am not so surprised what this LPS Mod has accomplished over its switching power supply. Also wish to say that this is much better decision than the sbooster because by default all the wires are at the back and not looking so sbooster fugly. (much less their is some L/C filter circuitry in this Mod which I believe is not in the sbooster) This has been one of my best mods to a piece of equipment to date. (35+ years).

Thanks for mentioning the warranty situation! It's unfortunate, but there have been PSU modifications that have caused problems, so we have to take this stance. If you do want to change a PSU in a LUMIN unit, make sure that you are comfortable with the risk or that the company supplying the modification is offering their own warranty to replace the official one. Otherwise, it may be better to trade-up for a LUMIN that features a toroidal PSU from the factory (U1 / P1 / X1).

I bought the kit for my LUMIN U1 mini + LPS50 and the change is impressive, almost as if I had changed the Dac or the speakers. The sound is much more extended up and down the frequencies, and without grain, with a continuity and linearity that leaves you wow. More crystalline and less prominent at the top, more natural in the middle area and the greatest improvement is in the lower area, with bass with more grip, more sound space. If I could summarize the immense improvement it would be as sound with elegance and continuity across the entire bandwidth. Thank you again Mr. Alvin Chee.

Excellent video Alvin!

I already had a LPS for another gear. Then I bought the Mini upgrade kit but put it in the closet because the switch power was already good. A month passed, I finally did the upgrade and it is a true upgrade to me. It took my system to another level higher. Thanks to Alvin

Blu-Tack works great for fixing the board to the bottom of the U2 instead of double sided tape.

Thanks Alvin, very well explained and performed. After going through lots of streamers and struggling with them I decided to opt for the u2 mini and am very happy with its ease of use and performance. However I’m always looking for ways to improve on my system and am very keen to upgrade the power supply to the Lumin. I live in the Wirral England, so would it be possible to order the power supply and circuit board that goes inside the Lumin from vinshine? May I ask if the advantage of replacement. Could I expect a little darker background and what’s the costing of these components. My system is in short .. Lumin u2 mini to Pontus 2 to Hegel p30 pre to passlabs xa30.8 power to q acoustics concept 500 Thanks once again Alvin 👍

Alvin, Would you comment on the expected improvements in sound quality/characteristics that one could expect from adding the external power supply.

I am using Sbooster power supply. It was easy to install and made a substantial difference in the sound quality.

Hi Alvin, do those silver footers under the LPS80 make a difference in SQ or they are just for looks ? thank you all the best !

Hi Alvin. I have LHY LPS 25VA model for my Lumin U1 Mini. I plan to upgrade to LPS 80VA. Can I use back my current DC cable? Does the power outlet connector of 80VA and 25VA the same?

As far as I understand the Lumin U2 Mini is a fully digital component. It just "calculates" bits (there is no digital to analog conversion). So why a new PS should be of any advantage for this? Do you think a computer calculates more accurate when the PS is highend?

Great video Alvin. Expertly executed. You didn't explain exactly the function of the internal circuit board. Would it be a filter circuit to for example minimise circulating ground noise and/or possibe internal Lumin noise back into the mains? I am a former Radio Ham with radio electronic qualification, so was confident to execute the mod. I used Plixir Elite BDC 12v/4a balanced transformer design which perhaps cancels the need for the internal circuit, though probably at more cost.

pretty much the same as the Lumin u1 mini LPS mod. ive used the Sbooster internal mod. after the mod a signifcant improvement in sound quality in my system.

what one of these two do i select for U2 mini •LPS50VA or •LPS80VA ❓

Does the standby modus of Lumin U2 mini works after the update in the same way like before?

Hi Alvin, can I use battery power 12v/5a for U2 mini? Many Thanks.

Can you mount the LHY Filter bank kit direct too the orginale power supply on the Lumin? For better sound improvment? I have the Lumin T2. The streamer chassis have better place inside.

I lived in Beijing and Hong Kong, I wished there were more South East Asian "KZfaqrs" - there are so many great Asian brands, it would be great to put "faces" to more of them. I see John Yang from Topping on ASR but that is it.

hi, if i choose lps 80 which is 12v 5amp, does it compatible to lumin mini u2, any differnce in sq compare to lps 25. does lps 80 reduce the life of player, whn compare with other like 2 or 3amp lps

Hi Alvin. Nice video. Can i use a 12 volt battery pack instead of a lps with lumin u2 mini?

What is the advantage of one of the larger power supplies as opposed to the 2amp unit. I ask because the switching mode power supply is also 2amp. What are the advantages of of the 5amp?

ALvin: When you powered up the Lumin For the First Time the Look on your Face Was PRICELESS

hello can u speak Chinese，because I am C hinese, I can't understand what you say😅

Doing this UPGRADE is absolutely useless. He would like to say that Lumin doesn't know how to design his streamers enough to need this modification

Just shows how much profit these companies make. An aluminuim box and a single PCB. £200 in parts at the most, £1800 profit. Criminal.

I feel sorry for the people who have wasted their money on a Lumin.