GRS 8PT-8 Woofer

The GRS 8PT-8 is an 8-inch professional woofer engineered to deliver deep, controlled bass with exceptional clarity. Its paper and fibreglass cone provides a natural, articulate mid-bass response that enhances any audio system, making it an ideal choice for hi-fi enthusiasts, instrument speaker builders, and custom subwoofer projects alike. Whether you are upgrading a home stereo, constructing a high-performance guitar cabinet, or designing a compact subwoofer for a small venue, this driver offers the precision and power needed to reproduce low frequencies with authority.

Technically, the 8PT-8 features a copper voice coil with an inductance of 1.5 mH and a DC resistance of 7.1 ohms, ensuring efficient power handling. With a sensitivity of 92 dB SPL at 2.83V, it delivers impressive output even with modest amplification. The Thiele-Small parameters—Qts of 0.55, Qms of 9.93, and Qes of 0.59—indicate a well-damped driver suitable for sealed or ported enclosures. A maximum linear excursion of 6.5 mm allows for deep bass extension without distortion. The woofer’s nominal diameter is 203.2 mm, with a mounting depth of 95 mm and a cutout diameter of 181.1 mm, secured by eight screws on a 7.75-inch bolt circle. Built with a robust paper and fibreglass cone, this driver combines vintage tone with modern reliability for outstanding performance in any bass application.