Even 7/8 or 3/4 the size would an enormous boon.
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Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)
- Thread starter Zuiko
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GaN 48v 5a - JYH23Z-4800500-BF
Just chiming in here to testify I’m very impressed with my Aiyima GaN power supply. I tested it with Fosi BT20A Pro + KEF 3001SE and also Fosi V3 + KEF R5.
Comparing to the stock 32v and 48v, noticed the 48v GaN substantially improved transients on both amps. Even 48v vs 48v where I expected little difference, the GaN was clearly more detailed with hints of better separation and soundstage as well. Even a non-audiophile remarked the stock PSU sounded muffled by comparison.
Great value, bought from one of Aiyima Aliexpress stores! I may order the 10a next!
Just chiming in here to testify I’m very impressed with my Aiyima GaN power supply. I tested it with Fosi BT20A Pro + KEF 3001SE and also Fosi V3 + KEF R5.
Comparing to the stock 32v and 48v, noticed the 48v GaN substantially improved transients on both amps. Even 48v vs 48v where I expected little difference, the GaN was clearly more detailed with hints of better separation and soundstage as well. Even a non-audiophile remarked the stock PSU sounded muffled by comparison.
Great value, bought from one of Aiyima Aliexpress stores! I may order the 10a next!
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Either I missed the irony or someone else missed where they are in all the years since 2020.
Not sure what's ironic, but I'm talking about the male IEC end on the power brick side. Vast majority of components I have come with C14 male IEC vs the C8 male IEC on the GaN power brick.
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So you assume the separate ground (or safety earth) lead in the IEC C14 configuration is used to shield the power cord?
No. When I mention C8, C14, I am mostly talking about the physical incompatibility of the C8 male IEC connector on the power brick with most of my pre-existing power cords' female C13 IEC connector. Most cords I have do have a separate shield connected to ground pin only at the wall outlet end, which can affect some noise, esp RFI. The skinny stock 18 AWG power cable with C13 female IEC that came with the brick technically can pass 10A but doesn't sound like it to my ears.
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Enough said...
Before this gets ugly, and as it’s the weekend now we should be civil, did you really ever manage to hear a difference in power cables? I genuinely want to know. And was it when you could not see what cable was attached?
Roland68
Major Contributor
Just don't do it, it's not worth it. Some people think nothing matters.But surely it's not the ASR stance that power cable wire gauge and shield do not matter?
I find it a bit ridiculous that supposedly high-quality GaN power supplies are connected without protective earth.
The second ridiculous point is that they save 20-30 cents on the cable and socket/connectors, and a power supply that's rated at 3.5 A on the mains side comes with a C8 connector that can only handle a maximum of 2.5 A.
A 0.75 mm² cable is just as ridiculous. Amplifiers like these can be connected with 1.5 mm². But maybe that's too expensive snake oil for some people.
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While having that ground conductor is desirable AF safety-wise and the C8's current rating hypothetically problematic, it might be a good idea to measure the actual AC current draw involved when using one of these things to power an actual amp. IOW, are there any measurable or audible real world consequences to that choice of connector and/or mains cord? BTW, many CE/UL rated power bricks with C13 connectors don't have the ground pin connected internally.
Roland68
Major Contributor
Anyone who knows a little about switching power supplies knows what it means when there's no protective earth connection, especially with regard to interference suppression, EMC, etc.
CE certifications don't exist; that's one of those myths. I'm not usually that sensitive, but I personally steer clear of switching power supplies from no-name manufacturers that don't provide any kind of load and overload tests, detailed technical data sheets, etc. I'd rather go for the cheapest Mean Well or TDK SMPS.
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A sensible stance. FWIW, I've been lucky with generic industrial SMPS units -- never had a failure unless you count one DOA, which was promptly replaced by the seller. By way of contrast, I've had a few power bricks fail, including a a 24V 10A one that still delivers DC, but causes a periodic popping noise in any amp it powers, and the 12V 5A one that came with our 16 year old's fancy, barely-out-of-warranty PeeCee monitor, which just flat-out died a couple of months ago.
Good price here it seems. Have ordered.
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