GRS 4SMP-8 Bass-midwoofer

The GRS 4SMP-8 Bass-midwoofer is a compact yet powerful driver designed to deliver articulate bass and clear midrange response in space-constrained audio projects. This 4-inch unit excels in applications such as bookshelf speakers, small subwoofer systems, or as a dedicated mid-bass driver in multi-way designs, where its balanced performance brings depth and detail to music and home theatre setups.

Engineered for precision, the 4SMP-8 features a polypropylene cone that offers low mass and high internal damping, ensuring natural sound reproduction with minimal coloration. The rubber surround provides long-lasting compliance and controlled excursion, while the steel basket adds rigidity to reduce unwanted resonances. With a total Q factor (Qts) of 0.65 and a sensitivity of 84.4 dB SPL at 2.83V, this driver is well-suited for sealed or ported enclosures, offering a maximum linear excursion (Xmax) of 4 mm for solid low-frequency output.

The ferrite magnet motor system and a voice coil inductance of 0.58 mH contribute to efficient power handling and transient accuracy. Whether you are upgrading an existing design or building from scratch, the GRS 4SMP-8 provides reliable, detailed performance in a compact footprint, making it a versatile choice for discerning audio enthusiasts.