What's the skinney on using a SMPS for Hi-Fi?

tweakk · 19th June 2010, 05:19 PM

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!

Sch3mat1c · 19th June 2010, 06:37 PM

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!

Tim

tweakk · 19th June 2010, 06:52 PM

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

theAnonymous1 · 19th June 2010, 07:27 PM

Quote:

Originally Posted by tweakk

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.

wwenze · 20th June 2010, 12:29 AM

Quote:

Originally Posted by tweakk

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

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.

AP2 · 20th June 2010, 07:48 AM

Quote:

Originally Posted by tweakk

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.

tweakk · 20th June 2010, 11:48 AM

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?

AP2 · 20th June 2010, 03:19 PM

Quote:

Originally Posted by tweakk

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.

tweakk · 20th June 2010, 03:23 PM

I'm very sad right now :^(

tweakk · 20th June 2010, 03:29 PM

I guess I could use a step-up transformer. Would this present a problem? How many watt rating would you recommend?

19th June 2010, 05:19 PM	#1
tweakk diyAudio Member Join Date: May 2008	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!

19th June 2010, 06:37 PM	#2
Sch3mat1c diyAudio Member Join Date: Jan 2003 Location: Milwaukee, WI	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! Tim __________________ See my Electronics webpage -- the home of Vacuum Tube Drag Racing. The key to being a successful Audiophile: "I reject your reality and substitute my own!"

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19th June 2010, 06:52 PM	#3
tweakk diyAudio Member Join Date: May 2008	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

20th June 2010, 11:48 AM	#7
tweakk diyAudio Member Join Date: May 2008	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?

20th June 2010, 03:23 PM	#9
tweakk diyAudio Member Join Date: May 2008	I'm very sad right now :^(

20th June 2010, 03:29 PM	#10
tweakk diyAudio Member Join Date: May 2008	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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