Amazon currently has Belkin's 12-outlet power strip available for just $15.63, however this is only for Amazon Prime Members. Prime Members get an additional 20% off of its price of $19.54, which is actually still a pretty good price, seeing as this is typically around $30.
This surge protector from Belkin has 12-outlets, as you can tell by its name. There also two coaxial ports and two RJ-11 ports available for a landline phone. This is a great surge protector to pick up, since it not only has 12 outlets, but these are also spaced out rather nicely so that you are able to plug multiple items in without them covering up other outlets on your surge protector. Which is a common problem with the smaller (and cheaper) surge protectors out there. That makes this a great surge protector to use with your entertainment system.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap next-day shipping if you need it here extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime by hitting the link below. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year. Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits. While holiday shipping is over now, Amazon does also still offer extended returns for anything purchased before December 31st, can be returned until January 31st, 2018.