Sunking + Harbinger One = annoying whine when both are ON

[midwayfair]

Have you also tried running both off of two separate 9V adapter (i.e., two one-spots)?

The trouble is there are many things that can cause the noise, and many places it could be leaking into the audio.

[Cortexturizer]

I think I have, and that it didn't matter at all. I do own two one spots.

I also have an SKB pedalboard which has many outlets and actually has the quietest power I've ever used, the whole board is dead quiet and all of the outlets are completely isolated, it truly is fantastic. I didn't try using that, perhaps those are better and don't introduce whine. I'll try that as well and report here.

[Strassercaster]

if the sunking has a low battery it will whine I thought i fried something once and it was a low battery ha ha.. If you used a 1044 not 1044max it could whine if you used a 7660cpaz instead of a 7660scpaz thats probably the problem i went through all this last year with the sunking and a mercury box i built. I highly reccomend using the 7660Scpaz the ones without the s have a different  clock frequency and thats what causes the whistling.Use a 1054lt,7660Scpaz or a 1044 maxx all other variants  like 1044(nonmax)
will whine more than likely. what exactly did you use? It is possiblle you got a bad chip or damaged the one your using they are vulnerable to shocks and mishaps. You can get 10 7660scpaz on aliexpress for less than 2 dollars free shipping. I have about 30 of these if you want ill send you free to help.