Interesting video with Richard Vandersteen talking about his subs

Warning, I own and love Vandersteen Quatro's.  I did find this video highly informative.  He discusses subs in general and how HE decides to implement them wiht not just his speakers, but any.  He talks about freeing the main amp from 100hz down to allow your amp to sound better.  It also takes on the signature of your amp, which I first hand have heard many times.  Hope you enjoy as much as I did.  

https://www.facebook.com/VandersteenAudio/videos/vb.381738891972123/1447831528696182/?type=2&the...