I've got 3 BKF4-4 transducers installed in 3 theater seats. Each transducer is mounted in exactly the same way and the 3 are wired to a BKA1000-N amp in series as described on their website. There is a noticeable difference in output between the three transducers, with the one farthest away from the amp the strongest, the center one a little bit less, and the one closest to the amp the weakest. I had wired the system with some old doubled 18 gauge wire, and went ahead this morning and rewired the system this morning using a heavier gauge wire (14 GA) but this had no effect. Anyone have any ideas?