I use the Auricaps on all my outlets too, but couldn't tell you the ratings; although it may be on my system information in one of the upgrade notes I made. This is a very effective, inexpensive tweak to clean up noise. I still use an old Tice Powerblock One with Titan reserve power unit which was the orignal isolation transformer marketed and it does lower the noise floor. There are many newer and better models availble but if you can get a Tice cheap they work well.