Hello dear Motor-Talk Community I am a newcomer in these forums and since I would like to have advice from you I would like to introduce myself to you! My name is Florian Lange, I am in the 4th semester of the Abitur and am an enthusiastic smart driver. My place of residence is Berlin 😉 Now it’s time to go… I would like to build a closed bass housing for my smart however have zero haze of the self tinkering, other forum posts were rather less helpful and therefore the own post. Then no one can scream, I wouldn’t have mentioned it! Radio: Alpine CDE 120R Amplifier: MB Quart NSC475 Speaker: Infinity Reference 5032i Subwoofer: Alpine SWE 1243E As you can see, it’s about the Alpine SWE 1243E and now my knowledge is already listening to I know that I need the number of liters and so on, but also no longer. The box should be square! Many will certainly scream for data, so I’m going to attach 1 link to you. n would be a simple way to build the box; -MDF-plates -damp wool -and other thingshttp://…d.alpine-electronics.co.uk/…/OM_SWE-1243E_EN.pdf Achja, das ca. Wunschausschauhttp://www.janaundmatze.de/Carhifi/Kistenvergleich_2.JPG !EXCLAIMER! I can’t do anything with the data! Unfortunately, already embarrassing for an ABIturiient ;-( I don’t really want to have to go to a carpenter or hifi shop, the budget is tight.