GRS 5SBM1-8 5-1/4" Sealed Back Replacement Midrange with 1" Voice Coil

The GRS 5SBM1-8 is a 5.25-inch sealed back midrange driver engineered to deliver precise and articulate vocal and instrumental reproduction. Designed as a dedicated midrange driver, this unit excels in applications where clarity and controlled response are paramount, making it an ideal choice for upgrading factory speaker systems, building custom two-way or three-way designs, or replacing worn drivers in existing enclosures. Its sealed back construction eliminates the need for a separate enclosure, simplifying installation in tight spaces such as car doors or dashboards.

Technically, the driver features a treated paper cone mated to a foam surround, ensuring a smooth frequency response and reduced distortion. The 1-inch voice coil is wound with CCA (copper-clad aluminium) wire, offering an optimal balance of lightweight moving mass and thermal efficiency. With a nominal impedance of 8 ohms and a DC resistance of 7.1 ohms, it integrates seamlessly with standard amplifiers. Sensitivity is rated at 91 dB SPL (1m/2.83V), while the voice coil inductance of 0.8 mH contributes to extended high-frequency performance. The robust steel basket and ferrite magnet assembly provide a solid foundation, with a mounting depth of just 53.1 mm and a cutout diameter of 111.1 mm for straightforward fitting. Whether for hi-fi or professional audio, the 5SBM1-8 offers reliable, accurate midrange reproduction.