7 switch adjustable frequency points:  a, one switch for bass: can switch the low audio capacitor to ground 9.4+9.4uF.  b. Three switches for midrange: theoretically the capacitance of midrange can be adjusted from 6.8uF to 20uF.  c. Three switches for the treble: theoretically the capacitance of the treble can be adjusted from 1.3uF to 3.3uF.  There are 13 capacitors and resistances that are related to adjusting the frequency division point.  The treble midrange crossover frequency is 5300Hz to 2700Hz, and there are 6 switches that can be adjusted.  The bass midrange crossover frequency from 900Hz to 1700Hz has 4 switches that can be adjusted.  Switch:  Bass gain selector switch B-: Normal bass.  B+: Bass boost.     Midrange gain selection switch:  High: Midrange enhancement.  Low: The midrange is normal.  Tweeter gain selection switch:  T-: High pitch is normal.  T+: Treble enhancement.     Special Note:  The crossover point of this frequency divider has changed too much, so please don't ask where the crossover point is, because it needs to be calculated according to the actual situation. Moreover, the number and configuration of crossover points are related to the size of the speaker and the area of the speaker. We really don?€?t know the actual situation of your speaker size and configuration. This is a 6-way crossover for a large speaker, it can basically to meet the needs of different developers, it is ultimately necessary for enthusiasts to find the best high-fidelity sound quality results.     Package includes:  1 x Crossover