Hi again, a pity that no one has answered yet. just wanted to change the caption of my old topic because it was somewhat inappropriately chosen… didn’t go, was already too old. so sorry for the 2nd topic. my old mdx-c6400r had to go out…the buttons had a wobbly contact somewhere, the loudness knob didn’t want to do as I wanted (independent of the wobble contact), the display then just spun something and the radio reception really didn’t have any more now I finally got a new HU (sony cdx-ra 550) and I have to say that I didn’t think what the sound AND level could get out of my system!!! with the operating and control options I am also satisfied… could just use plug and play and the changer and the stick work as usual. however, I now have a problem which can only be heard at the LS in the doors (~100-800 Hz). it’s about magnat power bull hitting me dead coaxial LS as TMTs controlled by a pyle qa4400x. when I turn up the radio on 21-23, which is really quiet with me through the alto, the magnat trots start to crack. on 21 zb after 30 seconds…with each blow you crack more. at 22 it goes a little faster and at 23 jerks…depending on the music I hear right now. now I don’t have the possibility to find out exactly what it is…the pyle end stage or the magnat speaker. I also have the impression, because they j a can also be connected to the separation capacitors from the magnats, it is a coax system that just give up the mind? the problem I had with the HMTs in the amaturary board, also koax…however, it just made peng and the capacitor was disassembled 😛 I know, I know…sometimes murky bockmist…but with the opportunity, when it comes to the LS, I can get away from you right away. I want a new front system when the LS is to blame. price up to approx. 250€. hope that anyone is able to say with these infos: THAT’s it…that doesn’t like the processed performance and will definitely break ^^…clear that it’s not 100% to say but you can bring me a little closer.