15 inc bas zvučnik u kućištu okrenutom ka zadnjem panelu.
Raspona frekvencije od 40-400kHz pri imedansi od 4 ohm.
Konstantne snage 450W, dimezija 326x620x760 mm, težine 44.6 kg

The SI-X series has three (3) subs can help: SI-12BX & SI-15BX are folded horns that give you the lowest frequencies and the punch you need. The SI-18BX is a straight forward, no nonsense 18-inch bass reflex subwoofer with exceptional low frequency response.

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-15BX is a 15" horn loaded subwoofer that gives you the lowest frequencies and the punch you need. The SI-15BX is available in black and white version.