help with my car audio!!!!!!

ok so in my 1992 nissan primera ive had one stock speaker in the back of my car running off some shitty clarion head unit and now ive decided to upgrade it to a pioneer tsa6982s and a deh p3950mp pioneer head unit
my problem is that its not really the greatest sound and my one stock speaker in the rear of the car ran better and louder
any ideas ? im really stuck
btw im only using the 6x9's in the rear with nothing in the front without a sub or an amp
any settings ideas or anything would be greatly appreciated

amp the speakers in use. why aren't you using the fronts? As for settings I believe pioneer decks have SLA adjustments that help boost volumes.

your choices are greatly reducing your car stereo quality

Hi everyone :) I just bought a truck with a system but i HATE it and i need some advice....
It has 2 10" memphis m class subs and mclass amp? not sure what kind in a clear sealed box in my console with very little clearance so it smacks the floor everytime bass hits.....
It sounds decent from the inside...but on the outside it sounds rattley and shakey.....What can i do to make it sounds amazing inside and out? I was thinking of adding 2 more subs and another amp and putting them underneathe my back seat and lifting the box of my subs in my console so it doesnt hit the floor...Will either of these ideas work or do you have any other sugestions....? And also what brands do you reccomend for loud and clear bass?

what's smacking the floor, the speaker cone/surround or the box ?

the subs hit the floor....the box has no bottom.... its weird... also do you know what Q factor means?

what moron built that box ? try putting like a 1" strip of wood on each side to prevent bottong out like that.

Q has many meanings in electronics ..... the Q of what ?

Yeah its pretty messed hes an idiot. You can put your hand right under it and it sandwiches your hand between the floor. If i do put strips of wood on the sides...it will still hit the floor wont it?

put the wood strips on the SIDES of the bottom of the box ... not over the top of the sub