GRS RSB901-1 Replacement Speaker Driver for Bose 901 4-1/2"

The GRS RSB901-1 Replacement Speaker Driver is a meticulously engineered broadband subwoofer designed to restore the iconic sound of your Bose 901 system. As a direct replacement for the original 4-1/2-inch drivers, this unit ensures your vintage loudspeakers continue to deliver the immersive, room-filling audio they are renowned for. Whether you are refurbishing a cherished pair of 901s or replacing a single faulty driver, this component is the ideal solution for maintaining authentic performance.

This driver is perfectly suited for use in the Bose 901’s unique array configuration, where multiple drivers work together to produce a balanced, full-range sound. It excels in both stereo and home theatre setups, providing the necessary low-end presence and midrange clarity that define the 901’s signature character. The RSB901-1 is a reliable choice for audiophiles and DIY enthusiasts seeking to preserve the integrity of their system.

Technically, the driver features a paper cone and a ferrite magnet, ensuring efficient and natural sound reproduction. With a nominal impedance of 1 ohm and a DC resistance of 0.76 ohms, it matches the original specifications. The total Q factor (Qts) of 0.36, combined with a sensitivity of 91.5 dB, guarantees responsive and dynamic output. The copper voice coil wire and a cut-out diameter of 102.1 mm facilitate straightforward installation.

In summary, the GRS RSB901-1 offers a precise, high-quality replacement that honours the legacy of the Bose 901, delivering dependable performance for years to come.