Summary: When I first received my shipment, I sent it back because the box contained no manual, remote, or EQ setup. When I received a replacement (right away), the contents of the box were exactly the same: subwoofer only. The outside of the box says the sub is to be used with the wireless remote kit (which does all the cool room EQ, remote controlled volume and other parameters, etc.
Summary: this subwoofer is not wireless!! It is wireless ready (only place it states that is in the owners manual) and you currently can not order the conection you need--Polk said it should be ready in a month or two. If you need a wireless subwoofer this is not what you need.
Summary: When I first set up the entertainment system, I wasn't sure we needed a sub. I didn't like the thumps and thuds you heard with the larger 12" subs but I wanted a nice, strong sound. This little Polk rocks my world. It rounds out the sound nicely in the jazz, folk, and rock I listen to. But it doesn't vibrate or give me the too heavy sound. It's great for movies, too. Action scenes are better and stronger again, without being overwhelming.
Summary: First, this sub is wireless "ready", not "wireless". You have to buy the wireless adapter kit to make it a wireless sub and Polk Audio no longer sells the wireless kit. I bought the last one they had in stock. There are kits still in stores but no more coming from the manufacturer. I presume Polk discontinued the wireless kit because of marginal success with it (read the other reviews). Right now I have it hard-wired to the receiver with a cord running across the floor.
Summary: I bought this sub woofer with high expectations but was a little concerned when I read a few reviews complaining about "feed back". Unfortunately I have been fighting this terrible percolating sound when using the wireless feature. I called Polk and they suggested I send back the wireless controller and try another. Nope, same problem. I have been screwing around with this so long that I have exceeded my thirty day limit for returning the sub.