1. The crossover is suitable for triple + mid + bass speakers. The speaker is suitable for 4-8 ohms. The finished products are also mainly used for better coordination. Sound quality, give debugging accessories at the same time of purchase. 2. The crossover is a popular finished product, which is connected to a variety of speakers. It is suitable for high and medium bass, and the sound quality is the best; But 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 bass, low frequency or too thick bass, 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. Bass debugging: 1: right after connection, no need for debugging. 2: Change the low-mid frequency component of the bass. 3: Change the low and mid frequency components of the bass to decrease. Product parameters: Frequency point: 1000HZ / 7000HZ (that is, the bass works at frequencies below 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: 4 x Audio Speaker Crossover Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.