Bigtee,
There are 2 - 8" carbon loaded cellulose cone subwoofers with a long throw motor assembly, powered by a built-in 300 watt amplifier, with multi-band room response compensation. (20Hz - 100Hz) The subs both fire downwards.
The speaker is 43" high, 10" wide at the bottom (maybe 5 at the top), and 19" deep and weighs 110lbs.
It is covered with a sock, except for the wooden base and top plates, and sits on 3 cones. Like other Vandys, it will be factory upgradeable as improvements are made.
The top end is not quite like the 5s. It has the speakers set into a continuous flat plate the width of the speaker and tapered towards the top. The 5s have the speakers set into individually molded compartments as narrow as possible around the speaker with space between them and the sock. The bottom end is similar in that the woofer is in a box, but the 5s have a unique single 12" push pull dual driver sub.
The Quatro is 6 ohms, + or - 3 db, and the 5s are 8 ohms, + of - 3 db. Both are 87 db sensitivity.
So the Quatro is really well positioned inbetween the 5s and the 3A Sigs. Neither the top end or subs can compete individually with the 5s, but the package is much more integrated and flexible for set up than the 3A Sigs with 2 WQs.
I hope this helps.