isaac507
Member
Wow, how come that poor channel imbalance? Faulty pot?
This seems to confirm that the standard power supply of the A07 Max is indeed very poor, with its power being far from what they claim.
Pretty good amount but one channel shows that rising distortion above a few watts which we also saw in the dashboard.
Edit: Went back and looked at the December 2020 A07 review. Most interesting spec comparison to me was that Amir got more power for 8 ohms with the original A07 with the 32v power brick (48 watts) than the new MAX at 8 ohms with the 36v power brick (40 watts).
This seems to confirm that the standard power supply of the A07 Max is indeed very poor, with its power being far from what they claim.
It also corroborates the power supply test image uploaded by an amazon review, indicating that the power supply is significantly overrated.
Distribution center, like Amazon.Lol... Chinese outsourced QC...
Hi AltoVariago,The overall reliability of Chi-fi amps is ridiculous
With the supplied power supply, in mono it delivers practically the same power as the Fosi v3 in stereo with 48V. Again, no reason to buyReview updated with bridged mode and 48v/5a power supply.
Indeed that must be the explanation behind not getting much more power.@amirm Would like to point out as recently some people talking about TP32xx PBTL mode operation and may get confuse with other type.
- TPA32xx (or any other single power supply) amplifier PBTL mode is just parallel 2 set of BTL to increase output capability(current) but won't provide double power(voltage),the power increase depend on loss reduce on the MOSFET and inductor(if parallel).
- other Dual power supply amp configured as SE output(IR2092,Hypex,Purifi,LM3886,etc) can double output power when switch to BTL mode
- Surely TPA3255 also can double output power when switch from SE to BTL configured, but many of product design are use BTL or PBTL not SE.
The 20db difference between channels is not about level,is about H2 (the second harmonic) in the distortion chart.To market such a piece of s*** is ridiculous. Channel imbalance of 20dB is something making an amp unusable.
It could be but it was Aiyama first then Fossi Audio.Is it possible that fosi picked the best one, and aiyima picked it randomly?
It could be but it was Aiyama first then Fossi Audio.Is it possible that fosi picked the best one, and aiyima picked it randomly?
Agree. Better components mean better reliabilit.i dont think components matters that much to SQ?
reliability? yes
i think both the V3 and Max use high quality brand name components... that's not an issue to me
otherwise at this point it looks like the ZA3 balanced is the king? with xlr thrown in
Amirs 48v/5a supply probably isnt the Aiyima one either. I guess its the one from the Fosi V3.Thanks @amirm.
As indicated in review that stock power supply isn’t feeding 6a, is it possible to know what is it supplying max?
There is an interesting ongoing ASR discussion of Aiyima /Fosi /Douk power supplies here. Post 21 shows the manufacturer as Huizhou Fujia Appliance Tech and links to the brand's device report where I do not see model FS-SW21283606000D from Amir's 36v photo. I do see a photo with this same model FJ-SW21283606000D in this post listedThanks @amirm.
As indicated in review that stock power supply isn’t feeding 6a, is it possible to know what is it supplying max?
But it isn't. You chose to be offended.I find this statement offensive.
Who claimed otherwise?I see good participation here from the Chinese manufacturers.
If you can't produce a product well enough to not fail basic testing, maybe you shouldn't be in the business at all.Product variations are to be expected in this product cost segment.