Deskripsi speaker 18 inch PD 1850 MK 2 PD 1850 MK I diameter 18 inch impedance 8 ohm power handling 2500w sensitifiti 96 Db coil 5 inch frekuensi 47 hz subwofer rekomendasi import quality pabrikan China magnet besar frame almunium tebal tahan getaran Kualitas top