i replaced my front standard doorcards with the bose fitted speaker ones, everything plugged in ok, but sounds really awful now

if i fade to the rear its fine, fading to the front it gets all tinny and echoy, they arent out of phase though...... not sure if its the ohmage of the speakers, it did actually sound not half bad with the standard non bose speakers really.
Is there a setting with my headunit to allow these bose speakers to work properly on a non bose headunit, not really wanting to go out and buy some front speakers at the mo, no funds.

cheers!
Oli