Advantages with an outboard power supply

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.

All good information. Thanks Gents - 

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

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

— 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.