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Excellent Power Supply Solution

In case you haven’t noticed, it’s very hard to find a good, affordable DC power supply from a U.S. dealer. I wanted a 12 volt 3.5 amp model for a Netgear router.  The quality linear power supplies are considerably more expensive than the router. But, then I stumbled upon an interesting product from Waveform Lighting. They offer a $49 DC power supply for strip lighting purposes. The 12 volt model can handle up to 10 amps and 100 watts. I do not know the technical details on how it works, but the description states “very low ripple and noise.” It also has overload voltage protection. The DC cable is 16 AWG wire.  A nice feature is that you can attach an audio grade power cable with a C7 connector. I used a Shunyata Venom cord. 

The unit did add a noticeable increase in sound quality. A little more clarity, more lifelike vocals and less harshness  in the upper treble. If you have a 12 volt modem, router or switch, give the Waveform Lighting DC power supply a listen. Here is the link: https://store.waveformlighting.com/collections/power-supplies-and-dimmers/products/filmgrade-12v-24v...
boakey39

Showing 2 responses by erik_squires

erik_squires
16,665 posts
 
The one thing that I wan to point out regarding power supplies, is that they are 2 way devices. They can in fact create noise which makes it back into the household AC which then gets picked up elsewhere.  Look at it this way:

  • Almost all of the noise in your AC line has been created by power supplies elsewhere.

For this reason, I think linear power supplies can be a good idea for digital devices, but so can having multiple power filters or isolated filter banks.

Try to keep all the cheap wall warts "outside" of your analog power circuits. I wrote about this somewhat here:

https://www.blogger.com/blog/post/edit/7333914575040594914/3933177263956486881

Best,

Erik
erik_squires
16,665 posts
 
The ifi wall warts are in about the same price range, and extremely well reviewed for both measured and audible performance.  They replaced my Astron. They don't have nearly 10A of output though. :)


https://amzn.to/3n4W0xs


Best,

Erik
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