GRS 8SW-4 8" Poly Cone Subwoofer

The GRS 8SW-4 Subwoofer is a meticulously engineered 8-inch driver designed to deliver deep, controlled bass for a wide range of audio applications. Whether you are building a custom home theatre system, upgrading a car audio setup, or constructing a high-fidelity bookshelf speaker, this subwoofer provides the low-end foundation that brings music and film soundtracks to life. Its robust construction makes it equally suitable for both sealed and ported enclosures, offering flexibility for DIY enthusiasts and professional installers alike.

At the heart of this subwoofer lies a polypropylene cone, chosen for its rigidity and damping properties, which work together to minimise distortion and ensure clean, accurate bass reproduction. The copper voice coil, with a DC resistance of 3.86 ohms, contributes to reliable thermal performance and efficient power handling. With a total Q factor (Qts) of 0.88, a mechanical Q (Qms) of 4.22, and an electrical Q (Qes) of 1.19, the 8SW-4 is optimised for extended low-frequency output in moderate-sized enclosures. A maximum linear excursion (Xmax) of 6 mm allows for substantial cone movement, while the sensitivity of 88 dB (SPL at 1m/2.83V) ensures respectable output from modest amplifier power. The subwoofer features a nominal diameter of 203.2 mm, a mounting depth of 101.6 mm, and a cut-out diameter of 184.1 mm, with eight mounting holes on a 2-inch bolt circle for secure installation. This GRS subwoofer is a dependable choice for achieving authoritative, room-filling bass with minimal compromise.