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In Reply to: RE: Wow! Just got an Sbooster BOTW P&P Eco MKII discrete power supply... posted by Steve Parry on May 07, 2025 at 17:34:12
I know you said that the power supply takes the place of a wall wart but why ndo you think this is? You have my curiosity about a Clearaudio Performance TT a Lounge phono preamp that I would like to replace the wall warts.
That their wall-wart supplies AC, and all rectification and filtering are then done internally.
You could add a "better" external supply, but keep in mind that the Sbooster (or other DC supply) is DC out, which is then going to redundantly go through the Lounge's diodes, cap filtering and their internal voltage regulators. This may or may not affect noise and/or performance of the phono stage.
Were it me, I'd first try a higher amperage transformer and change to Belleson voltage regulators, but I realize that you don't DIY any longer.
I find it hard to understand how a PS for a TT motor speed controller can change the sound ... but it does !
About 10 years ago, after I had got my 'Number9' TT motor speed controller (alas, no longer available as the designer unfortunately died from Covid, a few years ago), I did a listening experiment - using 5 different 48v DC supplies.
There were 5 people listening - including Steve Tuckett, the designer of the Number9. The results were unanimous; worst to best sound was:
* Meanwell SMPS
* custom-made linear PS
* 48v SLA supply; two parallel strings of 4x 12v SLAs
* linear PS with an isolating transformer plus Schaffner hash filter between it and the wall socket
* Meanwell SMPS with an isolating transformer plus Schaffner hash filter.
...and could hear the difference when I changed the power cord that went to it. So it seems that anything that improves the power going to the motor drive may help the sound. All you can do is try it. I am sure they would take it back if you hear no difference.
Steve
Where can I buy one?
See link
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