Save your money, it wont help. The crackling your hearing is most likely bad reception not a power issue. particularly if it only happens with Sirius and the other inputs are clean.Hey Negative Entropy,
When I listen to Sirius with my Onkyo 876-- Polk speaker set up, I always here a lot of crackling sound. So I decided to try the power conditioners. I was looking at the panamax 4400 or the 5100.