These woofers are the similar to the W22EX-001 woofers except the phase plug has been removed and dust cap installed. Also a shielding can has been added. All changes were done by SEAS. We ordered them this way because we found air noise coming from the phase plug when used in a sealed box. Qt is also a bit higher at 0.52 vs. 0.34. Complete specs from woofer tester shown below. $275/ pair, free shipping. ~10 Pair available.