Jbl SUBBP12AM Bass Box Amplified 12"

Bass Boost: 0dB to + 12dB @ 45 Hz. What's in The Box?. Crossover Frequency: 40 Hz - 200 Hz. Here we freeze them, bake them and give every product a sunburn with 150 hours of ultraviolet light. Speaker products are also subjected to 100 hours of rated power using specific frequencies and music.