If you've got oil exiting via the dipstick tube or blowing the dipstick out you may have significant problems. You would do well to inspect the PCV system, make sure it is intact and clean and follow up with a compression test. Look through the site in the link provided earlier in the Engine Mechanical section for all the info you should need.
As for the audio, I'd recommend checking in with a forum with a more specific gearing toward car audio... Unless you find someone who owns products by that brand anything you hear is going to be hearsay or just quotes from Amazon's ratings.
Doesn't hurt to ask though, maybe someone with first hand experience will speak up.