Found secondhand for 20$!
Its a GAS (Great American Sound) 8 inch aktiv sub. No idea what year it is from but seems kind of old.
Did a really wacky setup to test it, used a 220V AC to 12V DC converter and then just cut the cables to the cigarrett outlet and just out it in to the sub, bridged a cable from the positiv to REM så it turns on. The converter has a switch so i can turn it of if i want.
Then even more wacky is my iPhone Lightning to AUX dongel into AUX cable, spliced the cable so it goes to the small speakers on top and also to a RCA cable that goes in to the sub.
Overall works great! Want to know of anyone knows anything about this sub and if there is a better way to connect it.
Also it was 200 Sek, around 20$ but you can Google the exchange rate for it.
Sorry for bad grammar! (from Sweden)