Add a Linear power supply or iFi SPDIF Purifier2?

@fuzztone thanks.  You definitely scored a great deal for the iPurifier.  May I ask what LPS you tried?  And what DAC do you use?

@audiotroy Yes, I know.  But I don’t have the funding now.  So, maybe I will save up.

For Innous, would your recommend Zen mini or Zen?

Thanks.  That one gives 4A.  My switch mode power supply says 11V-4.2A.  So, it is 0.2A short, will that work?

There are many LPS on AliExpress.  It is really hard to tell which one is good.  This is one reason I am hesitating.  I am watching the following, let me know if you can spot which one is more promising.  All of them provide more than 4.2A.

C$ 209.22  30％ Off | LHY AUDIO 80W DC linear regulated power supply Audio 80VA linear PSU DC5V, 9V, 15V 19V, 20V, 24V For HDD NAS Router MAC PCHiFi
https://a.aliexpress.com/_mMxKjca

C$ 85.92 | 120VA Ultra-Low Noise Linear Power Supply  Output DC 12V 19V @ 8A High Current HiFi Upgrade Power Adapter HTPC HD player/NAS
https://a.aliexpress.com/_mKAM4kA

C$ 68.62  5％ Off | BRZHIFI Modern Design 80W High Current With Protection DC Linear Power Supply 12V Hard Disk Box NAS Router MAC PCHiFi
https://a.aliexpress.com/_mry2hWO

I also don’t quite understand how to setup optic Ethernet.  Both the NAS and streamer are connected to the router.  And the Ethernet cable between the streamer and router is long.  So, with optic ethernet, the idea is to connect thebstreamer and router with an optical cable instead of ethernet cable?

@fuzztone 

thanks for your PM.  Yes, buying from AliExpress or from China directly basically means not returnable.  I tried search Amazon but can’t find similar LPS.  I may try eBay later.  

Just an update, I bought a LPS from China for $200 and there is a significant improvement over the switch mode power supply.  The most obvious improvement is the bass.  Money well spent.