Hello together. I have installed all the speakers from the premium sound system in my 850. However, I only have a 4-channel power amplifier, so that I operate the speakers in the front doors parallel to those in the dashboard. I have to take care that the LS in the A board does not get too much steam. Now I intended to replace them against pure tweeters via a crossover. Unfortunately, the AIVs are no longer available. However, there are still the matching mounts (http://www.extremeaudio.de/…volvo-850-speaker-holder.html), in which I would like to insert new tweeters. Which can you recommend to me? And which crossover should I take? Many greetings Eric