Sorry, I still don't get that point. It must have a DAC because it provides digital inputs.
A TPA325x based amp can have PFFB but no DAC if all it supports analogue inputs only. I'm sure you are well aware.
My thoughts on the Vibelink Amp
- Thread starter onlyoneme
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A TPA325x based amp can have PFFB but no DAC if all it supports analogue inputs only. I'm sure you are well aware.
hgo58
Major Contributor
I don't think you understood the initial question?
It is actually possible to do without a DAC even with digital input, as used in some class D digital amplifiers. Just not used in the WiiM design for the reasons given above.
I think I do.
I never said the contrary, did I? But it is not possible to have a digital input and no DAC and a TPA325x amplifier chip. Whatever you put between the digital input and the naturally analogue input of the TPA325x is a DAC, independent of how it works.
hgo58
Major Contributor
And that what I answer in my first response. WiiM chose standard components for the reasons above.
EddNog
Major Contributor
The whole lot of us, right here, with Simba being the VibeLink
Yes, and I had agreed to this answer, even if @Burnside's question was, if @pke thought that TI are wrong with there specs, not how the input stage works.
Few (but some) manufacturers build their own Class D amplifiers. Most are using standard components, whether they are made available as chip amps (like e.g. TI) or amplifier modules (like e.g. Purifi or Hypex).
Yes, I think we can stop telling each other now what each other already knows.The question I answered was from @pke :
"why not convert it to the needed PWD stream for amplification directly?"
You did reply to a post by @Burnside, not to @pke directly. This would have made the message a little more clear.
hgo58
Major Contributor
Post in thread 'My thoughts on the Vibelink Amp' https://forum.wiimhome.com/threads/my-thoughts-on-the-vibelink-amp.6811/post-131865
So not really talking about the same
@hgo58 true. if with current design one would be able to convert the chip to true digital as i suggested and PFFB was is still needed, then an ADC for PFFB would be required indeed (and probably become a nightmare to implement)
@EddNog power DAC's; also true. indeed a different design. i guess those work best to direct drive each individual speaker with digital correction in the pre-stage?
never seen or heard 100% digital amps IRL tho even when writeups of such a system are 25+ years old
even Philips 'true digital' speakers back in the days aren't 100% digital
oh... the confusion
sry guys, never meant this to happen. just wondered about the initial question. forget the rest.lets go back to WIIM
it was food for thought and about as serious as the starter of this thread (as it turns out )
@EddNog power DAC's; also true. indeed a different design. i guess those work best to direct drive each individual speaker with digital correction in the pre-stage?
never seen or heard 100% digital amps IRL tho even when writeups of such a system are 25+ years old
even Philips 'true digital' speakers back in the days aren't 100% digital
oh... the confusion
sry guys, never meant this to happen. just wondered about the initial question. forget the rest.lets go back to WIIM
it was food for thought and about as serious as the starter of this thread (as it turns out
)
F1 Fan
Active member
A couple of questions ..
* Does the Vibelink out 200w at 4ohms?
* Via RCA, would there be any really noticeable difference between this and a Ncore / Purifi amp?
* Does the Vibelink out 200w at 4ohms?
* Via RCA, would there be any really noticeable difference between this and a Ncore / Purifi amp?
See the answers on ASR.
Yes, the Vibelink Amp can put out 200 W into 4 ohms.
The somewhat worse performance through RCA noted by Amirm might really just be due to his particular setup (and he clearly said so). Having said that, there are countless iterations of Hypex or Purify module based amplifiers. Most (but not all) of them can provide even higher output power. Some (but not all) of them show even lower distortion figures, mostly in the inaudible range. Some (but not all) of them have even lower distortion figures in the audible range. Some (but not all) of them have more grunt into <3 ohm speakers. None of them can be had at the price of the WiiM Vibelink Amp.
Don't get me wrong. There are systems that will benefit from using system based on the higher up the range Purify or Hypex based amp modules, no question. This might or might not be relevant, depending on your speakers and listening environment. Judged on its own, the WiiM Vibelink Amp is worth every penny you spend on it. It's easily one of the best TPA3255 based power amps for sure.
