YG Acoustics writes: “Our Invincible subwoofer is an ultimate performance sub-bass speaker. Invincible uses our largest BilletCore driver—53 cm (21”) in diameter—driven by a 6kW amplifier, with an advanced DSP controller. All in a multi-layer, sealed box aluminium cabinet.
The tilted stack of the twin driver Invincible 21.2 shown here combines the benefits of dual opposing drivers with the impact and placement flexibility of a front-firing sub.
In its dual driver configuration, it stands 177 cm (70″) tall and weighs over 200 kg (440 lbs).”