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Looks like I have to add PFFB to this amplifier :D

they are the manufacturers of these power supplies

Hi Dan

I bought both directly from taobao, which is the original supplier and has all the specifications. Aliexpress stores are mostly resellers, like the one where Dan bought it

I have measured between a PFC LLC power supply and a non-PFC LLC on A07 max, and the result is that the power supply with PFC is noisier, higher THD+N than the non-PFC.

Your measurement results show a lot of noise, including main noise and its harmonics. While H2 and H3 are not too high

I also measured with the smallest PCM5102A board on the market, the input signal is from Amanero directly and the other is amanero via ADAU1401. In below picture it is THD+N vs Level 1kHz

Chinese LLC SMPS, much cleaner than MW LRS350

i just test with AYIMA 48V5A and get same result

my measurement,with lrs350 48v (7,2A) power supply, btl mode, 4Ohm load. Quite different amirm’s result

What? You said 146x79x90 is A70’s dimensions? I thought that is A07 Max’s Come on! LOL

SMSL D-6s 150x42x128,5 Do you see it? 79mm high LOL

That is the size of the packing box. AIYIMA often lacks information about the size of the product, the same with the A07 Max, I was quite surprised by the small size

I noticed that increasing the LED blacklit causes spikes to appear

Only 150$ on Aliexpress

D6s always on and no setting for auto standby

These inductors do not direct contact with the cover. The picture is that I measured the temperature immediately after taking it off because I felt it was very hot before Both dual inductors have the same temperature when the amp does not have input signal. I will try to measure again when...

Inductor temp, amp idle no signal in, 48v supply, room temp 22*C. Quite hot right?

If I remember correctly, the SMG is supplied with 4.2V power from the IC A6163Y step down