Fuentes: http://www.avsforum.com/t/1238398/reed-exodus-anarchy-25hz-tapped-horn https://sites.google.com/site/amateuraudio/projects-1/tapped-horn http://www.audiokarma.org/forums/showthread.php?t=276760&page=9 http://www.diymobileaudio.com/forum/build-logs-project-install-gallery/85854-6-5-tangband-30-hz-tapped-horn-2.html http://rockgrotto.proboards.com/thread/1697 http://www.volvotreter.de/th.htm