Hi holmz, glad you made it over here and getting some good advice. I can't comment on the above info except to say about 3 years ago my wife and I added two bass shakers under our couch and absolutely love them. Aurasound and a beefy plate amp which we enclosed in a walnut cabinet. Dialed in the crossover and volume and smile every time they kick in. They're not for everybody but it was money well spent for us.
One cool thing about them is they can be fully active and as soon as you stand up you can't tell they're on. Good luck.
One cool thing about them is they can be fully active and as soon as you stand up you can't tell they're on. Good luck.