GHXAMP Treble + Midrange + Dual Bass Speaker Crossover Audio 4-Way 3 Way Crossover Speakers Filter Frequency Divider 200W 2PCSTips: Price for Two Crossover board. The frequency divider for a treble, a midrange, two bass, the speaker can also use a single bass for highMid and low speakers, speakers for 4 8 ohm impedance, the design is to take 4 8 OHM public value design Of the market products are mostly the same, in order to better improve the sound quality, Size: 11 cm length, 7 cm wide, 2. 5 cm thick. Frequency: 1000HZ 7000HZ (that is, bass work in the following frequencies