Da first part of dis mystery has ta do wit two different n' opposite definitions fo' filter bandwidth. Every loudspeaker requires equalization (EQ) ta some extent, n' fo' every last muthafuckin EQ filter desired tha DSP must be busted some lyrics ta tha frequency, amplitude, n' bandwidth of tha filter (Figure 1). Straight-up wide bandwidth filtas may be used ta prop up tha saggin low frequency response of a gangbangin' full range cabinet n' straight-up narrow filtas used ta cut up resonizzlez up in some horn-loaded compression drivers, fo' example.