IT IS ONE MODELL WITH 1 SPEAKER!!! I HAVE IN THE PAST 2 PSC, WORK PERFECT BETWEEN 100-350HZ ON CROSSOVER! INCREDIBILE! SUB ON VOICE! SOO MUCH "COHONES" ON MUSIC! I CAN NOT FIND AGAIN THE MODELL! THE SPEAKERS ARE SOMEWARE IN EUROPE(THAT I HAVE)Moderated By: brian@diysubwoofers.org