What's the skinney on using a SMPS for Hi-Fi? - diyAudio
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Old 19th June 2010, 05:19 PM   #1
tweakk is offline tweakk  United States
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Default What's the skinney on using a SMPS for Hi-Fi?

I'm fooling with a TA2024 SI amp and heard that it sounds it's best with a 3A or more SMPS over a SLA or linear supply.

Is there a way to clean-up the output of a switching supply? Is it really necessary or are some people just picky. can a SMPS work well as a pre-amp supply?

TIA!
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Old 19th June 2010, 06:37 PM   #2
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Certainly. Pros use them for powering physics equipment, for example, the kind that count single photons, or measure cryogenic thermal noise. Nanovolts and femtoamps. Radios of all types, in all bands. And what's a microphone / phonograph signal, milivolts? Audio looks *huge* in comparison!

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Old 19th June 2010, 06:52 PM   #3
tweakk is offline tweakk  United States
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Thanks Tim

I'm sure that they use custom designs and not ones made in China and bought on Ebay :^)

My dilemma now is to figure what and where to buy. What switching frequency etc.. I'm sure that some additional filtering and capacitor storage cant hurt.

I did read here that a SMPS provides little current on the negative rail. I have no idea what that means but it doesn't sound like a good thing.

Bill
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Old 19th June 2010, 07:27 PM   #4
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Quote:
Originally Posted by tweakk View Post
I did read here that a SMPS provides little current on the negative rail. I have no idea what that means but it doesn't sound like a good thing.
Oh noes!!!

It's a good thing that little Tripath chip doesn't use a negative rail them.
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Old 20th June 2010, 12:29 AM   #5
wwenze is offline wwenze  Singapore
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Quote:
Originally Posted by tweakk View Post
I did read here that a SMPS provides little current on the negative rail. I have no idea what that means but it doesn't sound like a good thing.
Quote:
Originally Posted by theAnonymous1 View Post
Oh noes!!!

It's a good thing that little Tripath chip doesn't use a negative rail them.
I lol-ed.

Anyway whoever said that statement (re: SMPS having little current on the negative rail) must have been looking at computer PSUs too much.
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Old 20th June 2010, 07:48 AM   #6
AP2 is offline AP2  Italy
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Quote:
Originally Posted by tweakk View Post
I'm fooling with a TA2024 SI amp and heard that it sounds it's best with a 3A or more SMPS over a SLA or linear supply.

Is there a way to clean-up the output of a switching supply? Is it really necessary or are some people just picky. can a SMPS work well as a pre-amp supply?

TIA!
Hi,
I have read many speeches on the TA2024 and similar amps.
I just want to inform you that knowing the problems of an SMPS that can generate on an amp and I really tried to solve them (EMI-RFI-IMD introduces on amplifier), and finally, the voltage should not fall below the low frequencies.
I do not want to force the purchase of this power supply, I have interest to force companies that buy 500 pieces at time. But after reading many articles on these little amplifiers, I thought it may be good information.
this psu can be obtained even at low voltage eg. 12 or 24 (single / dual).
it is obvious that a TA2024 or similar, do not need the module PBTU-2.
This compact PSU very special, it behaves like a battery, yes, incredible but true. It is completely different from others ...see design and components.
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File Type: jpg DPS-400+PBT2-Filter.jpg (86.7 KB, 411 views)
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Old 20th June 2010, 11:48 AM   #7
tweakk is offline tweakk  United States
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wwenze

Yes that thread was about someone trying to use a computer supply and the advice was to somehow use two such supplies to remedy the effect.


AP2

That looks great but the input shows 190v-250v. What about 120v here in the US?
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Old 20th June 2010, 03:19 PM   #8
AP2 is offline AP2  Italy
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Quote:
Originally Posted by tweakk View Post
wwenze

Yes that thread was about someone trying to use a computer supply and the advice was to somehow use two such supplies to remedy the effect.


AP2

That looks great but the input shows 190v-250v. What about 120v here in the US?
Hi,
sorry, I did not think well when I put my post.
version at this moment remains at 230VAC.
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Old 20th June 2010, 03:23 PM   #9
tweakk is offline tweakk  United States
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I'm very sad right now :^(
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Old 20th June 2010, 03:29 PM   #10
tweakk is offline tweakk  United States
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I guess I could use a step-up transformer. Would this present a problem? How many watt rating would you recommend?
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