Any decent player can handle the crappy oem speakers on the 2GS. I used the old speakers for a while on several Pioneer and Kenwood 2DINs...and it worked out ok. However when i replaced them with Polk Audio DB's...and wired them through an H/K amplifier...just WOW..what a difference thaat made!
Btw...Alpine headunits can handle 2ohm speakers just fine...i suspect something else is at fault...