The treble and bass are paired, the treble is 4 Euros and the bass is 6 Euros, so the treble should be attenuated when making a frequency divider. It is normal to add the resistance of line elements such as inductance and capacitance to the box and mark it with 8 ohms. There are two common frequency dividers for bookshelf speakers: first order, second order and third order. Among them, the second-order use is more two roads. The famous formulas for calculating the second-order frequency division of two channels are: Ning Kerui, Bessel, Butterworth and Chebyshev. To make a frequency divider, you need to know the specific parameters of the horn.

1, first measure the impedance of the unit at the frequency division point with an instrument; 2. Calculate the L and C parameters of the frequency divider element with the formula; 3. According to the two parameters, measure the deviation of the frequency division point with an instrument, and adjust the L and C parameters of the high-low pass accordingly: capacitance? L: inductor

After the box is completed, it is necessary to install the speaker and frequency divider, and carry out actual debugging.

For fixed unit, fixed box and fixed inverter tube, some online parameters are measured. If you buy it directly, it may not be allowed. Unless you send a speaker unit and a box, let the manufacturer of the frequency divider tailor it. Generally, the cheapest frequency dividers are customized for several hundred yuan, using domestic components. So if you do diy, you'd better learn relevant knowledge yourself and make your own frequency divider. But the frequency divider is the most difficult to adjust in the speaker. To be a good speaker includes the selection of speaker, the processing of box, the production and adjustment of frequency divider. However, it is still based on experiments, and there is no need to buy too good ones. Some also buy tens of dollars. You tell the merchant the model of the horn and let him match it. The picture below is for reference only and is not suitable for your speaker model. That red capacitor is dozens of oceans. If you make a few thousand yuan speaker or a ten thousand yuan speaker, use this product to compare and match. Come on, brother. :) Finally, a formula for making a frequency divider is attached, and you can study it yourself.