Or you can get a digital multimeter and test the sub for resistance. If the sub is 4 ohms, then it should read around 4, if the value is close to zero then the subs are shorted.
im sorry but bose sucks @ss.read all the consumer reviews.anyone with a good ear will tell you they are bad. get a VELODYNE subwoofer.they are awsome and the best.they cost a little more then most but well worth the money.I have a cht-15 it really th...
These links will let you download Alpine's reference sheets for the Type R and Type E subwoofers, which include recommended box volumes for sealed and ported boxes.