How do i make my subs/ speakers louder and more bass???????

i have a Panasonic SA-AK320 connected to my laptop with 2 original speakers, 5 alpine SPS-171A speaker (no box), and 2 other Panasonic speakers (boxed), and the problem is when i get close to the floor i hear really good and loudu bass but when i get up i hear no bass at all and it seems very low, also i dont have amp