I did wonder that too.
The spec sheet on the wiim product website is also potentially misleading given it quotes ≤0.0005% in the "power and amplification" section under where the 100w/8ohm figure is stated
WiiM Talks Vibelink Amp
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The spec sheet on the wiim product website is also potentially misleading given it quotes ≤0.0005% in the "power and amplification" section under where the 100w/8ohm figure is stated
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Hi Team,
The THD+N at 5W is 0.0005%, equivalent to -105 dB (A-weighted). We’ll be sharing a detailed test report soon for anyone interested in a deeper look—stay tuned!
Ok, so long as that is consistent with how the Amp pro figures have been measured to support the "60% more powerful" claim
slartibartfast
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We know the Amp Pro and Amp weren't measured at 1% THD from the ASR test results.
From the ASR measurements we can see that both Amp and Amp Pro were designed so that they cannot reach 1% THD at all. At maximum output volume they are well below 1%, and this is the point where they reach 60W output.
The Vibelink Amp is not output-limited, so it can go way above the 1% mark - so it is IMHO understandable that WiiM quote the 1% THD point as rated power. You need to select some point as a reference and 1% is not unreasonable. I'd just like to see this listed in the spec sheet.
However, while technically correct, it is probably misleading to most reading that the Vibelink "offers nearly double the power of the WiiM Amp Pro". Even if we accept the rated 100W figure of the Vibelink Amp, that results in only about 2,2dB higher output level compared to 60W of the Amp Pro. This is a pretty small increase in perceived loudness - probably perceived more like 5-10% increase in level.
To actually double the perceived loudness the output would need to increase by about 10dB - which would require 10x the amplifier power. So if we compare to the Amp Pro with its 60W at 8 Ohm, an amp being able to play double as loud would need to provide up to 600W into 8 Ohm.
The Vibelink Amp is not output-limited, so it can go way above the 1% mark - so it is IMHO understandable that WiiM quote the 1% THD point as rated power. You need to select some point as a reference and 1% is not unreasonable. I'd just like to see this listed in the spec sheet.
However, while technically correct, it is probably misleading to most reading that the Vibelink "offers nearly double the power of the WiiM Amp Pro". Even if we accept the rated 100W figure of the Vibelink Amp, that results in only about 2,2dB higher output level compared to 60W of the Amp Pro. This is a pretty small increase in perceived loudness - probably perceived more like 5-10% increase in level.
To actually double the perceived loudness the output would need to increase by about 10dB - which would require 10x the amplifier power. So if we compare to the Amp Pro with its 60W at 8 Ohm, an amp being able to play double as loud would need to provide up to 600W into 8 Ohm.
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I think I mentioned most items in this list before, but you definitely bet me with "passing birds".Friends, family, dogs, cats, the cleaning lady. Passing birds
Now I have those pctures in my head.At least in theory, there could be electronic switches bypassing the volume pot, which cannot be used, yet, due to missing app support. Doesn't sound all that likely to me.
In any case thus would only make sense for a complete bypass, so full gain, and some are not happy with that thought. Implementing yet another stepped volume control this way was definitely pointless.
Exactly. So, no matter how you put it, the Vibelink Amp does have a higher output power, indeed.
It may feel a bit like cheating, but technically it is not. The Vibelink Amp can get (a little) louder, not only on average, but also for peaks. And this is not the only difference, of course. Pretty much all measurements published by Amir at ASR look better than those for the Amp Pro.
There's no 100% match between use cases, of course.
Apples and Oranges... Where in "nearly double the power" is "perceived loudness" even mentioned??
@WiiM Support what is DAC filter type set for Vibelink amp? Since the app does not have filter type control, I'd like to know the default setting.
Thanks
Thanks
slartibartfast
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Nearly double the power is only around 20% increase when measured in the same way as the WiiM Amp and Amp Pro though. Isn't marketing wonderful?
It is interesting that you quoted my statement without the first part where I said:
I.e. I don't dispute that the statement is formally correct.
I just believe that *most* people reading the formulation from OP will assume the difference in power is dramatic, while in practice it is not. Those that understand how amplifier power relates to perceived loudness might not find my post informational, but perhaps some others might.
I do understand the need for a manufacturer to market the product in best light, but I feel that as a community we need to support each other at making educated purchasing decisions.
EddNog
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You're just...missing the remote, as we all are.
They decided if you need remote volume, you'll do it via the attached streamer, and not via the VibeLink. Strange decision, I know.
Maybe the designers all live in small apartments where they listen from within arm's reach.
-Ed
EddNog
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The commenter is making no sense. That doesn't have any sense to it. I wouldn't believe it.
-Ed
Read on it. The user stated it came from instruction manual.
I say yes. Think of it as a power amp with the option of having a digital or analog input depending on which device it's connecting to. It's not a pre-amp allowing you to switch between different sources, that's what you'd use your Ultra or other Wiim streamer for. I see it as a set it and forget it device (even to the extent of setting the volume and leaving it at that) with the connected device doing the switching between sources, volume control etc via its remote or app.
I guess this page. @RyanWithWiiM has been asked to have this clarified and the original tentative response was that it was "thermal related", but that he'd pursue a more detailed response if such is available.
I will think about it before purchasing since my speakers are rated 4 ohms and low sensitivity. Thanks for showing up the manual.
I got the same information I got from the web. There maybe other booklet came from the device as @Burnside showed.
slartibartfast
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Yup I deleted my comment after seeing that
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