Thing is, these subs arent made to perform well in a sealed box. You determine the type of enclosure a sub needs based on the elctromechanical parameters aka TS specs that is listed. Not all subs thrive in sealed and not all thrive in ported. A perfect box is the balance between matching with the sub's parameters along with matching with your amplifier power output along with your vehicle acoustics/cabin gain. Theres literally no sense in half @ssing a setup. If you are strapped on cash, you can just use the boss amp now and buy the big boy amp later.
We have all been through the cheap route and all that leads to is disappointment and empty pockets. By the time you go through all this cheap sh*t, you already lost out on so much money trying to replace and re-upgrade everything that you actually spent way more than you would have spent if you bought proper stuff the first time.