Was looking at these 7 inch woofer/sub ?? Speakers on ebay and tryin to figure out what boston acoustic unit they may have been meant for , and if subwoofer or woofer.. Any help would be great.. Tryin to find spec's Here is link to them on ebay http://www.ebay.com/itm/Boston-acoustics-7-speaker-Model-BUNITY2001/251702107810?_trksid=p2045573.c100034.m2102&_trkparms=aid=555012&algo=PW.MBE&ao=1&asc=20131003150253&meid=b74d2a9fe1e944038f7b1214077c0c0f&pid=100034&prg=20131003150253&rk=3&rkt=8&sd=251715783807