What you are experiencing is not "power supply noise", but most likely ground loop noise. The fix is not to shill Apple power supplies, which as switching power supplies are still extremely noisy, but to use proper connectors and signalling.
That's like saying "I had back pain, so I bought a 10,000 dollar mattress and it's fine now!" Meanwhile, the actual solution was that the person needed a firmer mattress.
Knowing what the actual problem is rather than what product fixes it will save you time and money.
