1. The crossover is suitable for triple + mid + speakers. The speaker is suitable for 4-8 ohms. The finished are also mainly used for better coordination. Sound , give debugging accessories at the same time of purchase. 2. The crossover is a finished product, which is connected to a of speakers. It is suitable for high and medium , and the sound is the best; not all speakers and all crossovers are the best fit. After use, there may be too much or too little treble, low frequency and low frequency of the , low frequency or too thick , AND too much or too little high frequency component in the mid-range. Triple debugging: 1 - Right after connection, no need to debug. 2: Change the high-mid frequency component of the treble. 3: Change the high-pitched mid and high frequency components. Midrange debugging: 1: right after connection, no need for debugging. 2: Change the mid-high frequency component of the midrange to increase and decrease. 3: Change the low-mid frequency component of the midrange to increase or decrease. debugging: 1: right after connection, no need for debugging. 2: Change the low-mid frequency component of the . 3: Change the low and mid frequency components of the to decrease. Product parameters: Frequency : 1000HZ / 7000HZ ( is, the works at frequencies 1000HZ, the mid-range works between 1000HZ and 7000HZ, and the treble works above 7000HZ). Power: 200W. Impedance: 4-8 Ohm. Circuit: Determined by Debugging from 6db / oct to 12db / oct. colour: red Material: PCB Package Contents: 2 * Audio Speaker Crossover Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.