The Firestick 4K does not publish a noise spec. Now a good question is, what should the maximum noise spec of a source be to minimize the noise of my entire system? For example, there's no point in a -120 dB S/N figure for a source if the figures for the Onk and ADA are lower.

I really need to understand all this better. Thanks for raising awareness.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated