In order to be able to have the units reconed, they have to be removed from the cabinet. How can I do this? Just unscrew the screws at the front or do I need to remove the backpanel first to be able to disconnect the units? Is there any soldering needed or do these use the same sliding connectors as the later beovox speakers? (At least, the Beovox s55 has such connectors inside.)

Thanks for your help!

They should just unscrew at the front and the wires slide on. The only soldering skills you will need will be for the complex cross-over. You will find the quality of the inside rather higher than that of the S55 if it is similar to others in the range. Instead of foam, they use a type of blanket inside the cases.