I've had a powered sub for years, and finally decided to replace my 4 space robbing old school floor speakers with bookshelf speakers hung on the wall. I bought a pair of Polk T15s at Best Buy-they sound great-especially for $110. The receiver powering them is a Harman Kardon stereo-not surround home theater. I found some Staubs on Craigslist for $20. There is almost no info on the net about Staubs after doing a Google search. But for that price, why not? They have metal cases, are very heavy, are about 8 inches tall, and have 3.5 inch woofers. They sound really good-almost as good as the Polks---for $20-----But there is a catch. They're not very efficient at all. With all 4 speakers on, you can barely hear them with the Polks. There is no way to balance between front and rear-it's just on or off for each set of speakers. Here is a pic of one hung high on the wall. I cut the angled wooden block so they would be aimed down. Polk T15 sitting on top of the speaker it replaces. The wall mount brackets I ordered should be here this week.