Hello together, since it has now exceeded the 30 and the last system in the Golf or Audi A3 had at that time I am no longer uptodate. Ride Mercedes Vito W639 Mixto (5 seaters with partition) and somehow I simply miss the pressure. Previously installed is a Becker Cascade Radio with original boxes in the front area and in the partition 2x crossover with Boa loudspeaker and tweeter. Was delivered at that time in 2007 so delivered or upgraded. my emphaser xt4 box and ea2160s amplifier found. My question makes sense to use the old stuff and put it in the trunk or buy an active bass box for under the seat? Price should not be so expensive. Wouldn’t have a problem with used parts. Thanks for reading, I look forward to your suggestions. Mfg Christian