S swr12d4rtype Junior Member 1 0 Bulgaria Feb 6, 2014 #1 Hi guys! I bought one Alpine SWR-12d4 R-TYPE sub. Now I wanna make ported enclosure for max SPL. The tune is going to be 33hz. How many cft does it have to be? Click to read more...
Hi guys! I bought one Alpine SWR-12d4 R-TYPE sub. Now I wanna make ported enclosure for max SPL. The tune is going to be 33hz. How many cft does it have to be? Click to read more...