hi dino, we have the same source getting the kit

. i have the same problem as yours, n i think i'll try your method.
anyway i have several question, before you fix the problem:
1. did you try to connect the amp with any source?
2. did you use input caps?
when i connect my amp with an mp3 player as a source(cheap one

), all of that noise is gone, no hum or low frequencies noise. without a source connected, i can hear that noise from the speaker.
i also try to take out the input caps, an the noise become smaller.
one more think, when i check the DC voltage on the output, its only -0.3mv. is this normal?
thx