2004 passat w/ monsoon info

Vehicle is a 2004 VW Passat with the Monsoon factory stereo

 First of all, thanks to all who reply and help.  I've used this forum for years for reference.  It has always been an invaluable source of information.  Years and years ago I owned a car stereo business.  Now I'm rusty when it comes to these new cars so I need your help.  As a favor, my wife asked me to replace all the speakers in a 2004 Passat with the Monsoon system for a friend of hers.  This is my question:

The Monsoon system apparently runs eight speakers (four tweeters, four mid ranges).  When I installed the new speakers, I used two pairs of old stock I had laying around. 

Thr front pair is a component set with the crossover.  I wired the crossover into the mid range wiring and split it to the tweeter and midrange.  The front factory tweeter wire, I just unhooked and it goes to nothing.

The rear pair is a set of two ways.  I wired them into the factory midrange wiring.  The rear factory tweeter wires were unhooked and go to nothing. 

The stereo just doesn't sound right.  So my only idea was maybe the factory Monsoon amp filters the signal.  Should I wire tweeters to factory tweeter wiring on the components and remove the crossover?  Should I reconnent the rear tweeters?  It sounds like the speakers are playing full range sound (to me but I've been riding motorcycles forever so my hearing isn't the best). 

Any ideas or suggestions?

Thanks,

Shannon