18 inc bas zvučna kutija.
Raspona frekvencije 30-500kHz pri impedansi od 4 ohm.
Konstantne sange 800W, dimenzija 620x508x537 mm, težine 13.6 kg

The SI-X™ Series includes a range of full range systems from the SI-10X to the SI-15X plus three complimentary high power subwoofers for extended low frequency performance and increased SPL.

The SI-18BX is a straight forward, no nonsense 18-inch bass reflex subwoofer with exceptional low frequency response, available in black and white versions.