GRS 12SW-4 12" Poly Cone Subwoofer

The GRS 12SW-4 Subwoofer delivers deep, controlled low-frequency extension, making it an excellent choice for audiophiles and DIY enthusiasts seeking accurate bass reproduction in custom enclosures. Whether you are building a dedicated home theatre system, upgrading a car audio setup, or designing a high-fidelity stereo, this 12-inch driver provides the foundation for immersive sound with minimal distortion. Its robust construction and carefully engineered parameters ensure it performs reliably across a range of sealed and ported cabinet designs.

Technically, the 12SW-4 features an 8.5mm linear excursion (Xmax) and a displacement volume (Vd) of 426, enabling it to move substantial air for powerful yet precise bass. The total Q factor (Qts) of 0.98, combined with a mechanical Q (Qms) of 4.51 and an electromagnetic Q (Qes) of 1.27, allows for accurate transient response and smooth roll-off. Sensitivity is rated at 88 dB SPL (1m/2.83V), while the 3.7-ohm DC resistance (Re) and 1.1 mH voice coil inductance (Le) ensure efficient power handling. The subwoofer’s 304.8 mm nominal diameter fits a 289 mm cutout, secured by eight mounting holes on a 294 mm bolt circle, making installation straightforward. With a copper voice coil wire and a durable design, this GRS subwoofer offers exceptional value for achieving deep, articulate low end.