I had cheap speakers, but they played very well - detailed sound and an imaginary stage - everything was in place. Decided to upgrade my speaker and bought a Heco. What a disappointment awaited me when I connected it to my amp and listened - that wide stage that was was gone. Cheap speakers for 1500r do speakers for 35000 on an imaginary stage. The case when there is detail in the sound, but there is no scene. I started to figure out what's going on. I found out that the spectrum of the midrange speaker is not filtered as it should and a lot of HF is fed to it, but it is not able to reproduce the HF and it turns out that it introduces dirt into the sound and the scene disappears. I added 2 orders from the coil and the conder, which were lying in the trash and, oh, a miracle - a wide stage appeared, a fast impulse response is heard, and this is even without preliminary calculations. In general, the crossover in the furnace. Bought and finished with a file. A good cross to calculate and make costs a lot of time and money. I can’t understand why people gave so many fives to this junk, because the speakers are the bottom. Perhaps they have never heard anything better. And yet - drove the tone generator. They accurately play 30 hertz without fading and right up to the limit of audibility of my ears.