The 12 and 15" Selenium Loudspeakers Extreme subwoofers have two voice coils with 2 ohm each which can be configured for 4 ohm impedance (serial connection) or 1 ohm impedance (parallel connection). It has been developed reproduce the lowest frequencies in the audio spectrum - the sub-bass range - at high power in reduced volume boxes. It is the ideal subwoofer for sound competitions where best quality and power are required.

• Its advanced design cast frame is injected in aluminum with great mechanical and structural sturdiness.

• Its magnetic assembly has a bumped back plate and an extended center polar piece to allow long excursion and low distortion in the sub-bass frequency range.

• Its sturdy gold-plated connection terminals are easy to handle and assure perfect contact in connections.

• Its cone, with exclusive Selenium QCF (Quartz Composite Fiber) technology, is humidity-resistance and very sturdy, enabling it to withstand the tremendous accelerations it will be subject to whenever under high power.

• Its gasket, in SBR composite rubber, withstands high temperatures and ultra-violet radiation, common in tropical climates.

• Its high compliance suspension ring made of policloroprene rubber is appropriate to absorb stationary waves.

• Its double spider is made of Polyamide Fiber, which was especially developed for this purpose and provides the moving assembly with great linearity in excursion and high absorption in low frequencies.

• Its long voice coil produced in Kapton (8, 10 and 12 fiberglass (15 copper clad wire coated in polish withstands high temperatures.

• Its dust cap is produced in QCF and features an embroidered with "Extreme" logo.