Home » JA Audio Products » Powered Subwoofers JA-850S JA-850S use a downward-firing, acoustic-suspension woofer in a cube-shaped cabinet that will fit gracefully into a wide variety of rooms and can be hidden behind a plant or sofa. JA-SS7 JA-SS7 is perfect for small to medium size home theater or listening rooms. This powered sub features a down firing, down ported bass reflex design to produce deep clean bass. JA-SS10 JA-SS10 designed for accurate reproduction of bass and sub-bass frequencies. With its 10" Long-Throw woofer in the down-firing position, it will definitely impress you in the most shocking way JA-SS12 JA-SS12 is exactly what you are looking for. It is great subwoofer to round out your home theater system without breaking the bank. Pay attention to its down to 20 Hz low base.