The ARTEMIS Bass Reflex Series has 3 dedicated compact Sub-Woofers which provide substantial Bass for all the ARTEMIS & APOLLO Series of Loudspeakers. An excellent solution for permanent installations and mobile use.  The ARTEMIS Models 12SB, 15SB & 18SB, are a top choice for hiring, installation and mobile use. Best of all, they sound great, delivering outstanding bass response which is loud and punchy. These active subwoofers are equipped with 12”, 15” & 18” high-excursion woofers all with 4″ Voice Coils. Sturdy and stylish MDF enclosures with metal grille and dual bass ports. Equipped with a Class D amp and switching power supply they deliver massive power up to 1000W with great efficiency. All models feature a full DSP Control and balanced Input/Output/Link connections .