"the quattro's mostly solve the bass issues of the treo's" So will a pair of 2Wq subs. Actually, the Treo's don't really have bass issues. They just don't go quite as low as the Quattro's. Proper placement will enhance any speakers lower frequencies. As well as room treatment. I have listened to a pair of Treo CT's with 2Wq subs, and a pair of Quattro Ct's. I preferred the Treo CT/2Wq subs to the stand alone Quattro CT's. So did the salesperson. In regards to my listening, just my opinion. Dynamics really stood out with Treo combo. 8 eight inch woofers for Treo combo versus 4 eight inch woofers for Quattro's.
Cheers,
Tim
Cheers,
Tim