Advantages with an outboard power supply

I don't believe anyone has answered your question. Then again, it has been covered many times. The power supply is the heart of any audio component. In recent years, switching wall-wart power supplies have become popular because they work very well and cost the manufacturer a tiny fraction of a robust linear power supply. The power supply in theory isolates everything that comes after it in the circuit from RFI, EMI, DC, and dirty power "hash". It also, when well-designed and implemented, provides for dynamics, authoritativeness, propulsion, etc. 

The more expensive a component is, the more likely it is that it will have a robust power supply. Switching PS's are a cost cutting measure, virtually always. Generally speaking, an outboard PS that connects with a thin wire and 6mm pin is not going to be optimum. An outboard PS has great advantages in terms of avoiding transformer induced noise spuriae, usually at 60 hz in the US, but only if connected with a beefy and well designed umbilical connection. The Manley Steelhead phono stage is a good example. 

For better or worse, there is once again a lot of intellectually honest debate on this subject. One camp insists that if any component, including a DA, is a featherweight, it is bound to be lacking in the above qualities. Again to be clear, this applies to pre-amps, amps, phono stages and DAC's. When it comes to very high end DAC's, it is rare to find the lightweights but they are out there. Chord is one example. Benchmark is another. 

The external LHY LPS for the Bluesound N130 makes a difference to my ears.

Looking at several power supply options I ordered an LHY from TEK Electronics who rep Jays Audio. I also ordered a Sablon USB cable both of which should be here late next week. 

I had a Teddy Pardo with a RME ADI 2fs. I just traded it in towards a PSA DS MK1, so we’ll see how that goes. I picked up a PSA AirLens and want to go with is I2S connection which the RME doesn’t  have. Also wanted the flexibility of more inputs.

Back to the Teddy Pardo. What it added was essentially more of everything but if I had to start it would be weight and authority; going back to the stock switch supply, the RME seems a little thin and not as involving. I also ran a Synergistic Orange fuse in the Teddy which smoothed things out a little. I used a WyWires Silver Juice II Digital Series power cable which elevated the combo as well. In short you will not be disappointed with adding a Teddy Pardo LPS. I don’t remember what specific model I had, but the people at Teddy Pardo know so no worries. They were very easy to work with and coming from Israel I received within a couple weeks from ordering. Highly recommended. 

My set should be showing up on The Music Room so no idea if they keep it as a set or separate and pull the fuse out and sell separately. They just received so it’s not on their site yet, but I would think you could call or email them if interested.

— and another - LHY. Sold under the Jays Audio umbrella. Look to be well built and reasonably priced. I’m sending an inquiry for what model/voltage is recommended for the RME.

You also might look here if you don't want to drop big bucks:

 https://www.ebay.com/sch/i.html?_ssn=wolf6911&store_name=hifioriginalaudio&_oac=1&_trksid=p4429486.m3561.l161211

Located in Poland. Good quality, worked well with my Node 2i. 

All good information. Thanks Gents - 

So I bought a Bluesound Node N130 and ran it to a Denafrips Pontus ll DAC.  It sounded great.  I bought the Teddy pardo power supply and it really sounded better.  Any time you buy an economical all in one unit like the node, the company has to save money anywhere they can and a switching power supply is really cheap to make and that’s why the TP power supply sounds so much better.

All the best.

Small Green Computer has LPS at a good price.  

Farad build look very impressive. Their build menu is nearly that of Cheesecake Factory.

reading some articles and watching some YouTube videos and they say it will not help a digital signal.

Of course it can help a digital signal. An LPS is replacing the stock power supply of the component. If it’s well matched to your device, expect to have a lower noise-floor than SMPS, lower ripple effect, more reserve power.

I’ve used one on a dac and a reclocker.

I've used Farad power supplies on my Chord DAVE and M-Scaler with excellent results.

Jerry

I'm thinking about it also for my Node but I have been reading some articles and watching some YouTube videos and they say it will not help a digital signal. So, I'm on the fence.

There can be a lot of reasons why an outboard power supply might help, and it’ll depend a lot on the particulars of a given circuit and the PS specifics, but a good PS can certainly be an audible upgrade in some circumstances.

I built a regulated linear outboard PS for my Hagerman Bugle 3 phono stage, and it was a nice audible improvement.  Not sure what to expect if I upgrade the PS of my Topping DAC.