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Perhaps we have been lucky. I have a preamp and a power amp with about 5m of unbalanced cable in between and no noise

I think they will show a working prototype (probably I hope)

This is surely meaningful and works for the most part. I just think that, besides the lineup linearity and the features provided, it is also a matter of how much it takes to engineer the product. The Amp provides a hint of the cost impact of integrating a "difficult" feature, because it needs a...

Besides comparing the Ultra with alternatives from other brands, I think that it should be evaluated against the other products by WiiM. Only doing this we would also take into account the price strategy implemented by the company itself (at least a little bit). In terms of features and...

I would like a real analog input, one that doesn't get sampled and reconstructed later but I understand it would mean a big change in the internal architecture. About the display, nice to have, better allowing simple interaction. In case the Ultra will be an amp, pre out is almost mandatory :)

Acoustic characteristics surely play an important role, as well as age and care. Probably also the sensitivity of the analog line input enters the game because Mission Cyrus 2 has 0.650V and, unofficially, WiiM Amp something around 2V

Hi, I know about the nominal efficiency, it was 89 dB but the pair I have were not used for several years and stored not properly. After more than 40 years of this life I wouldn't be surprised to be a bit far from that efficiency. My comparison amplifier was a Mission Cyrus 2, a good guy from...

Unfortunately I must correct myself, it is still happening

First of all thank you for this investigation, it gives us precious information that can explain effects that we notice while using the WiiM Amp. Besides, I think that this is a specification that WiiM should provide because it makes a lot of difference knowing it in advance. In a use case like...

Well, the input sensitivity is a design choice, I guess that in this case the WiiM Amp has a higher one and this leads to a lower max volume. I think it would be nice to have the official information, it is an important value that determines the way to match this amp with sources.

The reason why I asked this question is because my setup is able to produce lower max volume sound with the WiiM Amp than with the previous amplifier I used, a Mission Cyrus 2. The line inputs of the Cyrus have a sensitivity of 0.650V and I suspect that the WiiM Amp has a much higher one.

You are right but @Smartplug is right as well, IMHO. It's just a different scenario. If I wanted to buy my first DAC I would check the functional requirements and then I would go to ASR and see which is the best alternative based on measurement. But if I wanted to replace my already decent DAC I...

Serious, but not too much. :) I mean, as long as the discussion stays in the domain of numbers and measurements every difference is meaningful, simply because it exists. Shifting in the domain of real sound perception most of the differences we talk about are just meaningless. To imply a real...

"Tube or vinyl" don't imply very bad measurements

Very good measurements don't imply good music but very bad ones often imply bad music, just to make it very very short :cool:

Hi, just an update on this point. Since the last available update (5.0.606744) this issue is not happening anymore, I will keep on checking

I think that starting from 88-89 db is a good value to be driven properly by this amp, my speakers are below that value

I experience the very same case even if the WiiM Amp is already on when I select it as audio destination

This is interesting, what does it happen to you in this case? Does sound start?

In my case it is systematic from the M1 Mac, not sure about the iPhone, I will double check it.