The Hertz Cento CS300 is a 30 cm 12 inch passive subwoofer engineered for compact sealed enclosures from 32 liters. It features a reduced depth design and no rear decompression hole to allow custom boxes shaped around the subwoofer for flexible vehicle installation. The single 4 ohm voice coil configuration maximizes compatibility with a wide range of amplifiers and multi-subwoofer enclosures.

Build details include a polypropylene cone and dust cap shaped through FEM simulations, a 35 mm 4 ohm voice coil wound in six layers of pure copper on a high thermal resistance glass fiber support, a special cooling system for extended high SPL use, and a spider support that vents to basket holes to reduce turbulence and distortion. The terminal block accepts cables up to 8 AWG and an ABS gasket allows fitting of the optional CG 300 grille for protection and finish.