Right we can say that. I only have this dac on my system.So in either case, the DAC acts as the pre-amp ? no other pre-amp needed?
Also, do I understand only at max volume do you get highest output (5v) of the DAC, how do.you do this without a preamp?
That is not a particular surprise. The PFC circuit is of course a switching circuit, and therefore may well introduce additional noise.nd the result is that the power supply with PFC is noisier, higher THD+N than the non-PFC.
Both power supplies look like very cheap Aliexpress (or similar) products. There seem to be very different power supplies.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.
View attachment 360783
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 itBoth power supplies look like very cheap Aliexpress (or similar) products. There seem to be very different power supplies.
Are there data sheets for the power supplies?
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.
View attachment 360783
That is not a particular surprise. The PFC circuit is of course a switching circuit, and therefore may well introduce additional noise.
Not really - it will only tell you if that particular simple PSU is betterWill check this soon ) The Micro audio has no PFC and no LLC circuit. This will tell us if the simpler is the better )
Hi Dan
they are the manufacturers of these power suppliesChinese sites say anything and everything)
MP-H250S48 SMPS Switching Mode Power Supply Module 250W 48V 5A PFC - Audiophonics
This SMPS MP-H250S48 switch-mode power supply module is capable of delivering 48V voltage and 5A current for 250W of power. It also features PFC (Power Factor Correction).www.audiophonics.fr
Check here what a LLC + PSU + Soft Start PSU looks like :
"Micro Bamboo Project" : 3E Audio 260-2-29A Stereo amplifier + Micro-Audio PSU
I can't help help but wonder if you aren't looking at this the wrong way. You state that the Mornsun et al. drop in power output when used without fans, but imply that the Micro audio does not, so you ask if this could possibly result in perceived audible effect as stated. The Micro audio will...audiosciencereview.com