Filter Filters Under $50 Install Bay Remove All Filters Condition New (4) Install Bay BB99 400 Hz 4Ohm Non-Poplar 99 UF 100 Volt Bass Blocker Pair $8.95 Install Bay BB14 14UF 50V 2800Hz Non-Poplar High Quality Bass Blocker Pair $8.95 Install Bay BB199 100 Volt 200 Hertz at 4 Ohms 199 UF Bass Blocker Pair $9.95 Install Bay BB398 398 UF 85Hz 4 Ohm 100V Non-Poplar Pair of Bass Blockers $10.95