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What PSU for my USB DAC and future upgrade's ?

post #1 of 24
Thread Starter 
Hi,

I got a Musical Fidelity V-DAC II hooked up to its original power supply.
I know and have read alot that a better PSU will upgrade the sound quality even more.

In the future i want to add more components to like a Phono Stage and Headphone amp

The Phono Stage will likely also be a Musical Fidelity

What PSU would give me the best results ?
This one from Musical Fidelity ?
http://www.musicalfidelity.com/products/vSeries/v-psuii/

Or maybe a PSU like this:
http://azerty.nl/producten/zoek/?MERK_ID%5B10675%5D=on&LEVERTIJD_MAX=on&GROEP_ID=1346&p_tab=1&v_uitgebreid=off&PAGINA=1&SORTERING=prijs_desc

Or make a bid on this one:
http://www.marktplaats.nl/a/doe-het-zelf-en-verbouw/meetapparatuur/m658725034-regelbare-voeding-in-220vac-uit-10-15vdc-3a.html?c=a2384ef0ece270f44503df9f8598c624&previousPage=lr

What would suit my needs the best and wich will sound the best ? (if there is any difference)
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post #2 of 24
You might as well flush your money down the toilet in my opinion. You can read all the audiophile garbage you want, eventually people will tell you buying a $500 power cord is worth it.
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post #3 of 24
Thread Starter 
Quote:
Originally Posted by DrGroove View Post

You might as well flush your money down the toilet in my opinion. You can read all the audiophile garbage you want, eventually people will tell you buying a $500 power cord is worth it.

And you know because you have lots of audiphile equipment and have runned tests to prove this ?

Yes some things go a bit far and i wouldnt waste 500$ on a power cord either but this is something different.

The Musical Fidelity V-DAC is made so that it benefits from a better PSU, same goes for there Phono stage.
Its also one of the reasons there DAC is rather cheap for the quality you get, its ment that you upgrade parts on it so you dont have to spend over a 1000$ in one go.

Read all the reviews about the V-DAC and find out why and how it gets better from a better PSU wink.gif

(BTW if a 100$ to 150$ investment make's an improvement to an allready high sound quality its not a waste of money, infact 150$ is rather cheap then)
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post #4 of 24
$130 for a 12v, .5A DC power supply is nothing short of insane, I don't care what is in it. That's over $20 a watt. Perhaps the transformer was hand wound by monks or something.


Unless the V-DAC II is very poorly designed, or the stock power supply is very poorly made, no artifacts from the PSU should make it through to the output. DACs and Op-Amps have a very good PSRR, and the power input of the device should have filtering, driving overall PSRR even higher. If they omitted input filtering then they are just trying to squeeze money out of you for the upgraded PSU.

You can make an exceedingly quiet power supply using nothing more than an LM317, some caps and maybe a choke.
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post #5 of 24
Thread Starter 
I dont care if anyone would find it wasting money, i will get a PSU and i do want it to be a quality unit to.
Insane ? maybe
Do i care ? not even the slightest

All i am asking is what is a good PSU to power up high end Hi-Fi equipment.

Is it to much to ask ?

Pff... i bet i cant even tell you guys what my Dynacord subs cost new.....
I mean i can find 400W rms subs attleast 20times cheaper ! (doesnt mean its better though)

Btw,
The Musical Fidelity V-DAC II is a reall quality unit but its not really a full complete DAC.
It only has 1 USB in and 1 analog out, no volume control, no headphone amp, no nothing.
The adapter that comes with it is just a simple 500mA unit to.
These DAC's are ment for starters that dont have a 1000$ to spend on a DAC.
This one cost about 350$ so its much more affordable for people like me and you can upgrade it over time by adding more to it.

This first upgrade i want is the PSU. (because its affordable)
So i am just asking for a little help to buy a proper unit that i can use with future upgrade's aswell
And since once you got all stuff complete it will have cost alot of money so i dont want to skimp out on a cheap PSU.
You wont skimp out on a quality PSU for an expensive PC either now would yah ?

I found lots more units here btw:
http://www.conrad.nl/ce/nl/overview/2110330/Regelbare-laboratoriumnetvoedingen?sort=Price-asc
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post #6 of 24
I would get the Musical Fidelity one specially if you plan to buy into the company and products. that linear PSU has 3 DC outputs. you can plug everything into it. if you don't think it makes a difference in your system.. just return it smile.gif

edit: outputs
Edited by bumblebee1980 - 3/26/13 at 3:07pm
    
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post #7 of 24
Quote:
Originally Posted by Farih View Post

I dont care if anyone would find it wasting money, i will get a PSU and i do want it to be a quality unit to.
Insane ? maybe
Do i care ? not even the slightest

We are just trying to save you money bro. As kevmatic said, unless the product is extremely poorly designed on purpose to make you upgrade, there shouldn't be any audible difference from a new PSU.
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post #8 of 24
Thread Starter 
Quote:
Originally Posted by DrGroove View Post

We are just trying to save you money bro. As kevmatic said, unless the product is extremely poorly designed on purpose to make you upgrade, there shouldn't be any audible difference from a new PSU.

The unit itself is not poorly designed, its really good unit for the price you pay really.
Just the PSU that come's with it is just a cheap 500mA adapter.

Its all over the internet really how a good PSU will/should upgrade the sound quality of USB DAC's

http://yourfinalsystem.com/dac-reviews/113-musical-fidelity-v-dac-vs-v-dac-ii

http://www.audioadvisor.com/prodinfo.asp?number=MFKV2P100

http://www.lexicommultimedia.nl/nieuws/review-musical-fidelity-v-dac-ii-v-psu-ii-en-diverse-interlinks/

There is lots more reviews and test with upgraded PSU's and they all mention that it upgrade's the sound for what an audiophile will call little money.
Even dozens of the V-DAC and/or V-PSU alone, shurely they cant be all wrong right ?
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post #9 of 24
Its possible a new PSU will make a difference, but it really shouldn't. This implies that there isn't enough input filtering on the DAC. Remember that, even if the power supply output is clean, the power cable will pick up significant noise, making filtering on the DAC input important no matter what.


Is the wall wart that came with it switching? If so, then I can see it making a difference. Do you have pictures of it? Also, the reviews you link seem to be using cheaper, $70 supplies. Which are still pretty expensive. Linear (non-switching) power supplies in that power range are about $20-$25.

EDIT: Oh man, you're looking at laboratory bench supplies! That's MASSIVE OVERKILL. The reason they're so expensive is that they have a wide output range, have current regulators and are designed to be indestructible (you can short them forever and they shrug it off). You want to buy a regulated, linear wall wart or tabletop power supply for maximum cost/performance ratio. The features in a lab supply are useless for you, unless you want to run like 10 of these things off of one supply.
Edited by kevmatic - 3/27/13 at 6:39am
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post #10 of 24
Thread Starter 
Quote:
Originally Posted by kevmatic View Post

Its possible a new PSU will make a difference, but it really shouldn't. This implies that there isn't enough input filtering on the DAC. Remember that, even if the power supply output is clean, the power cable will pick up significant noise, making filtering on the DAC input important no matter what.


Is the wall wart that came with it switching? If so, then I can see it making a difference. Do you have pictures of it? Also, the reviews you link seem to be using cheaper, $70 supplies. Which are still pretty expensive. Linear (non-switching) power supplies in that power range are about $20-$25.

EDIT: Oh man, you're looking at bench supplies! That's MASSIVE OVERKILL. The reason they're so expensive is that they have a wide output range, have current regulators and are designed to be indestructible (you can short them forever and they shrug it off). You want to buy a regulated, linear wall wart or tabletop power supply for maximum cost/performance ratio. The features in a lab supply are useless for you, unless you want to run like 10 of these things off of one supply.

I am looking at those PSU's because i cant really seem to find alternative's to the one's mentioned in the reviews/tests
Here in Holland things are always harder to get/find then in the USA.

The wall wart that came with it is a simple switching PSU of just 6W (500mA)
CREATOR: Warning: Spoiler! (Click to show)
Electrical Specification
•Input range : 90-264VAC (Full Range)
•Frequency : 50/60Hz
•Input current : 0.3 A rms(Max) at 115V input.
•Efficiency : 60% minimum at full output
•Output voltage : See rating chart
•Output current : See rating chart
•Ripple : 1% peak to peak maximum
•Protection : Over current protection(OCP),
AC recycle short circuit
Over Temperature protection

Environmental
•Operating temperature: 0°C to +40°C ambient
•Storage temperature: -20°C to + 60°C
•MTBF : >100,000 hours at full load and 25°C
ambient Temperature.


I need a PSU that can power up 3 device's in the future, this DAC, a Phono stage and a headphone amp or a pre amp with headphone output.
Total will probably be below 30W so i think i could easely settle 3A PSU

Here is a shop that has alot of stuff thats based in Holland to:
http://www.conrad-uk.com/ce/en/category/SHOP_AREA_37349/Power-Supplies-Mains-Adapters;jsessionid=A5E60055EAD941333237E53B57AAAA9B.ASTPCEN22

Just to many choice's frown.gif
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