A DSP usually has at least the functions EQ, Crossover/Frequenzzweiche, delay/runtime correction. Now you play in the car often only stereo sources, stereo means 2 sides, left and right. In the car HT/MT/TT are further away to the right than left, so that Stereo works, you would have to install the right speakers to the exact same distance as the left. So use the runtime correction to delay the sound of the left side until the sound of the right side n side reaches the right ear. Both LSs are now virtually at the same distance. With a DSP I can specify the milliseconds myself or measure it with the inch stick, the DSP software then adjusts the milliseconds itself, depending on the distance. With the EQ you can raise or lower certain frequencies. The crossover limits the frequency response of a speaker. But what is the purpose of the measuring microphone? What can be set with it? I can use a measuring microphone e I think I need a constant test tone. Now I have a measurement of a constant tone and see which frequencies arrive at the measuring microphone at what strength. 50hz – 8db, 250hz – 6db and so on. But what do you do with this information? What do you do with it? Couldn’t a measuring microphone also measure the runtime? The DSP knows for itself best when it sends out a signal e.g. on channel 4. The Mikorofon can then measure this sound and d he DSP could determine the difference. Same runtime of each channel would be the same distance? Wouldn’t that be more effective than measuring it with the customs stick? Listening it in electronically, but maybe not every DSP offers this function. With the information that 250hz is 6db sound and compared to 50hz is only 8db sound, I can’t do anything about it. What do you set up with this information and why?