amp. That means that each speaker must have a speaker wire AND a power outlet to work properly.
Now, you will have some people on here point out that these aren't the most accurate-measuring speaker out there, and I can't really argue that. But, measurements or no, they sound good. I think the biggest hangup with DefTech is that they obviously post some specs that are not realistic. If you are looking at DefTech specs and measurements, then only look at 3rd party results (ie don't trust DefTech's own published specs).
As far as the built in subs--they are great for 2 channel music. If you want the chest-pound slam of a theater, don't expect to get it out of a pair of 8080STs. You will still need external subs for the at-the-movies bass.
I ended up going with the Goldenear Triton 2 towers over the DefTechs. Those are basically first-cousins to the 8080st