I read their theory of their products, I think it is reasonable from circuit design point of view. The other factor is, how it blends into XD05 pro AMP circuit design, sometimes direct replacing may not be the best, maybe with the buffers plugin, it really makes difference if one can hear, then...

Deleted, unrelated post.

Rmb700=usd96.7, so Ali has higher price.

That is why I tried to check it on Taobao, but I could never register success on it.

The symbol is shared by china yuan and japan yen, Taobao should be showing china yuan.

I believe that this can be fitted into XD-05 Pro with door closed, but I wonder how this small device can declare the performance of FM255 machine? And who knows how good the FM255 is? Guess one has to pay the price to know. what price you have seen on Taobao, I can only see it starting at $260...

Anyone tried opa1656?

Don’t think so, you can compare dimension with ss3602, which is barely fit, and this mark9 is much bigger on all sides

I am no expert but I guess that combine ss3602 with OU902 is not ideal combo, because OU902 seems designed for IC opamp, not for discrete design. Ufeel has a lengthy introduction about their theory on Taobao store.

and compare with Dunu SA6 mk2 if possible, so many lower priced competition on the market.

And CA Fathom

I purchased recently, but I think it is more on the charger than on XD05 itself. As long as 12V is supplied, it is on desktop mode, I don't think XD05 will know how the power is supplied, right?

Yes, the charger has display for each port showing voltage,current and wattage.

Yeah, I will try it all.

Ok, to clarify this myth, I did a quick check. As stated, with the charger, my xd-05 pro can demand 12V when turning on in EXT mode. With that, I switch to turbo mode, led is in red, then I turned it off and then turned it back on again, and it is on turbo mode. All are done in EXT position. I...