Good afternoon, I had already asked here once, but especially in the electronics sector a lot changes quickly. My BMW E30 is in the penultimate phase of its restomod and now the interior is supposed to experience some love. The edition is that everything disappears in the original recordings or recordings, which seem original. The radio is an original Bavaria Reverse CII, equipped with Bluetooth, preamplifier outputs, AUX and FSE. This is because of the optics not There should be two loudspeakers in the footroom, two tweeters in the mirror triangle, two LS in the already unfortunately existing hat storage holes and a subwoofer with the amplifier into the spare wheel pit including wood/MDF expansion. Modern cables with remote are already lying, battery is in the trunk. Components were recommended to me here the Rainbow Beat 4, but now I stumbled on the audio system R110.4. LS I thought about 4x Focal A130 AC. Can you easily use the crossover n operated in the front with tweeters? If so, which tweeters? Which sub fits? Does this even fit together? Is it worth dressing the shots in the footroom with aluminium butyl/etc.? A complete insulation of the door is not in question and the LS is not in the door anyway. Thanks for your tips, I am more of the DAU