Difuzor GRS RSB901-1

This driver's parameters were carefully optimized to match the performance of the classic Bose 901 loudspeaker systems. Individually or in multiples, replacing your legendary but aging speakers has never been easieror achieved better results. HighlightsDrop-in replacement for Bose 901 driversEach individual driver is hand checked and testedFits Series III, IV, V and VI models, and moreOptimized cone/coil/suspension for linearity and reliability1 ohm nominal impedancePremium-quality motor structure maximizes performance Product DetailsGRS RSB901-1 Replacement Speaker Driver for Bose 901 4-1/2 1 Ohm This driver's parameters were carefully optimized to match the performance of the classic Bose 901 loudspeaker systems. Individually or in multiples, replacing your legendary but aging speakers has never been easieror achieved better results. The top plate and T-yoke are Japanese-made cold forged low carbon steel. The flat back plate provides a uniform surface area to which the magnet is bonded, and the outside of the back plate is chamfered to maximize flux density in the gap. Critical attention has been paid to the pole piece and voice coil tolerances, thereby assuring high yield and immunity to mechanical issues. High-grade Y-35 strontium ferrite magnet material is utilized in the motor structure to ensure consistent motor force. The cone is made of long fiber New Zealand blue color pulp paper, an ideal material for cone applications and the foam surround of this driver make it almost identical to the original manufacturers appearance, design and performance. It's rigid and just lossy enough to produce full, accurate sound. A 2-layer low oxygen copper voice coil is wound on a high temperature resistant polyimide former. Every driver is hand checked and tested, based on a 2 dB window. NOTE: This driver has an impedance of 1 ohm, and should be used only to replace the 4-1/2 driver in the Bose 901 (Series III or later) and Bose 802 loudspeakers. Compatibility with other Bose loudspeaker models or automotive audio systems has not been verified. This product is not manufactured or distributed by Bose Corporation, the owner of the registered trademarks BOSE, BOSE 802 and BOSE 901.