from what i understand the 6x9's only produce low notes and the 4" speakers produce the mids and highs correct? i just put in a couple 3-way infinity 6x9's and i beleive i am just getting bass from them. if i removed the 4" speakers and hooked those wires up to the infinity's ALSO i should get all notes correct? anyone done this? just trying to put quality speakers to good use.

i just put speakers in my car not long ago, sony 140 w in the front and roadmaster 3-way 400 w in the back. I was lookin for more bass in my speakers so i didnt have to buy subs, its all about wut ur lookin for u shud ask the people u bought them from and asked them about it.

The bass all comes from my rear 6x9's. If you turn the fade way up, it sounds treble-ish...

im saying tho will i get better sound from the rear that way or the way it is now?

If you replace the rear speakers with after market ones you will get a much cleaner sound out of the back, but not as much bass. I replaced mine with some Sonys thinking that I might get some more bass, but I got much less and it sounded really good, as far as treble goes. Then I took 'em back and put a 12 in the trunk and now I get a headache if I listen to the right music.

You're right in that they are crossed for different frequencies, but honestly I'm not sure how to get the full sound to one speaker. I don't think combining the two outputs would be a good idea, though.

if you connect both sets of wires your amp will not know what to do because it will see a short in the speaker, if you are brave , cut the wires from the mid/high portion of the 6X9 and connect that to your other connection.