"B-Stock, HK Audio Premium PR:O 18S - passive 18"" bass reflex subwoofer, 500W RMS, passive crossover @ 48-150Hz, 4 Ohms, 104dB SPL (129dB max), M20 thread for speaker stand, 2 handles, Speaker Twist in/out, 150Hz TP/HP filter, black housing....
Thomann Italia