I am apologizing up front. I got a small laugh from your reply. Sorry.
I am not talking about "air" filtering. I am talking electronic filtering. AC power suplies are made up of various types of 1) Rectification, and 2) Power filtering. It can also include thingslike a) Step up or Step down transformers, and b) Voltage or Current regulation, among other things. The filter is to tke care of noise and ripple etc on the main voltage. When using "brick type" power supplies, the circuit board(s) of the intended devices often have the filtering, regulation, and sometimes even the rectification.
Since I have not ever had a 2000 or 2200, I cannot speak for what is or is not inside the brick and what is on the Snap circuit board(s). But I would bet on pretty good odds that at least the filtering (if not more) is done inside the Snap itself.
Your problem sounds typica of power supply problems, but it could also be many other things. No way for me to tell you beyond this. Sorry...
For more information
REF:
http://en.wikipedia.org/wiki/Power_s...C_power_supply