so wanted to show a few pictures of my first heckausbau. fhz is a type89q and that has no double floor. I and my girlfriend have cut 7 std and adapted. the plate consists of 10mm mdf and the compartment for the amplifier is made of 22mm chipboard. I have brought out mm for 22€ covering material, you could process perfectly ned as with ebay. could not make any pictures of the compartment since the glue is still fresh. have removed the stupid hat rack boxes and only helix covers the bass comes forward. even if everyone says the sub is shit, the hifi test has passed with 1, still something and everyone has to have me for stupid so loud equipment. of course there is even stronger but it is enough for me completely. oh so the fs is a helix-esprit on the radio.