Experienced hobbyists will not have any trouble with this issue, which is cropping up more and more often in emails and phone calls: how do I put together the individual components of a frequency crossover so that the connections work the way they are shown in the circuit diagram? I’m happy to see more and more greenhorns toiling in the productive fields of the do-it-yourself world, maybe even inspired by this magazine, and sometimes they just need a little more help with the first few steps. It’s easy to say they should glue the parts to a wooden board and connect the components according to the diagram. But that’s not enough, because first you need to understand how a circuit works. This is easier with the S and M-series printed circuit boards developed by (Intertechnik), which can be used for all applications and for every common circuit. Sometimes multiple circuit boards need to be connected, but for the MS 3 crossover all you need is the LP S1-2W. We took a couple of photos to help you put it together.