JOHNMCELFRESH, there is a VAST DIFFERENCE between full range speakers with large woofers, that play down to or bellow 20hz(+/-3db or better), and ACTIVE POWERED WOOFERS!!!...make no mistake! The control and power deliver, and thus efficiency of a woofer that's ACTIVE(meaning the amplifier is coupled dirrectly to the woofer, AFTER THE CROSSOVER,as opposed to the amp being INFRONT of the crossover, as in any passive full range typical speakers setup) is FAR SUPPERIOR and MORE POTENT than a typical passive arrangement, yes! (all things equal).
So, no I'm not implying anything remotely similar to what you are pressuming I stated! You're listening to me, but you're not hearing me.
So hear this...Bass is the single most demanding and difficult thing for speakers and amplifiers to reproduce and thus control! Ative, especially highly efficient woofer designs need control and high damping factors to properly due justice to demanding bass frequencies. IT's not like moving a tiny tweeter a few thousands of an inch!
And the only way to properly control a large bass driver, or even smaller one's, with impact, extension, speed, authority, and weight, even percision, is to get as much control of the woofer as possible. And that's best done by putting the amplifier dirrectly to the driver(s). There are other factors to be sure. But this is critically more efficient than running the passive route, like most full range speaker configurations...you just lose too much going through the passive crossover. That's exactly why crossing over higher in a passive setup, to active powered subs for movies is much more efficient and dynamic of a pressentation overall. (THX's implementation). Passive speakers need help.
So, no, I mean nothing of the sort Johnmcelfresh.
Infact, take a pair of Def Tech BPtowers, with active subs, and run em agains't a pair of, similarly sized(woofered as well) Paradims or B&W's, and play some movies or heavy bass demanding music full range through em. You'll immediately notice the power,extension, dynamic effortlesness and lack of distortion with the acitive woofer designed Def Tech's!!!
We're easily talking a 200% improvement in power and potency in the bass dynamics and weight,easily! Infact, it's not even close. You can fill a LARGE ROOM with powerful awe inspiring bass response with the better Def Tech's. While the others, and similar I mentioned, need you to definitely add some powered subs.
Same goes with Designs like the Infinity Prelude MT's, NHT VT powered sub towers, Old Polk RT2000's, and even, yes, Meridian 8000's!
Speaker desings that start to approach this in passive designs, are very highly efficient larger Klipsch speakers. Still, getting an active sub setup surpasses these easily in bass authority.
Also, very efficient "transmission line" desings, like PMC and Def Tech(at lest they used to), grealy helps the bass response. Still, you take better more efficient designs, and add "active control" to the setup, and it's still a huge advantage!
Any quesions?