I think that the box that came with my sub (used) is not giving enough back pressure. Will Poly-Fill fix this?
No; poly-fill is useless in ported boxes. You can try sealing the port and seeing how it does in a sealed enclosure; you may just be getting port noise. But your best option is to buy or build a box that matches sub manufacturer's recommendations for...
where r the bookshops in Nanyang poly singapore poly Temasek poly?
NYP-On the 2nd Level.....Umm...Upon entering the poly,u will see a huge fountain...You will have to walk straight and take an escalator to the 2nd floor. The bookshop is located at Block A,Campus Centre,Level 2.
How can you make an old vintage ski jacket puffy again?
you can try stuffing it with batting, it is whats used in quilts, and some comforters, or buy a new one