Alpine HU cda-9815

Had my car broken into about a month ago =(

and they took my pioneer HU and two amps

Now the good news is they left my sub and my 6 x 9s .... and insurance has forked out enough for me to get a new head unit and two amps and maybe some splits ( as im thinking about installing it myself  to save some dollars =) )

now i have installed my new alpine cda 9815 but it isnt sounding really good with my 6x9s they are about 3 year old pioneer 6x9s and were very nice b4 with my amp setup.

now im wondering is it just that im used to an amp or should the 9815 run a set of 6x9s to a decent sound level ??

sorry couldnt find the edit button

im running the stereo with out any amps atm as the amps are outta stock in the store and im waiting on them to come in

I'm sure they will sound better when you put an amp back on them that will help to send them the power that they need.