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GRS RSB901-1 Replacement Speaker Driver for Bose 901

GRS RSB901-1 Replacement Speaker Driver for Bose 901

Name: GRS RSB901-1 Replacement Speaker Driver for Bose 901
Brand: GRS Audio
SKU: GRS RSB901-1
Price: 42.75 EUR
Availability: InStock

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

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

Product highlights:

Drop-in replacement for Bose 901 drivers
Each individual driver is hand checked and tested
Fits Series III, IV, V and VI models, and more
Optimized cone/coil/suspension for linearity and reliability
1 ohm nominal impedance
Premium-quality motor structure maximizes performance

Product details

GRS 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 easier—or 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®.

Technical Specifications:

Article number RSB901-1
Woofer Type Midwoofer
Nominal Diameter 4-1/2"
Power Handling (RMS) 30 Watts
Power Handling (max) 60 Watts
Impedance (Z) 1 Ohm
Sensitivity (SPL at 1m / 2.83V) 91.5 dB
Frequency Response 83 to 15,000 Hz
Voice Coil Diameter 1"
DC Resistance (Re) 0.76 ohms
Voice Coil Inductance (Le) 0.11 mH
Resonant Frequency (Fs) 83.4 Hz
Mechanical Q (Qms) 2.4
Electromagnetic Q (Qes) 0.43
Total Q (Qts) 0.36
Diaphragm Mass Inc. Airload (Mms) 3.38g
Mechanical Compliance of Suspension (Cms) 1.08 mm/N
Surface Area of Cone (Sd) 66.6 cm2
BL Product (BL) 1.767 Tm
Compliance Equivalent Volume (Vas) 0.24 ft.³
Cone / Diaphragm Material Paper
Surround Material Foam
Voice Coil Wire Material Copper
Voice Coil Former Kapton® / Polyimide
Basket / Frame Material Polymer
Magnet Material Ferrite
Overall Outside Diameter 5.2"
Overall Depth 2.17"
Baffle Cutout Diameter 4.02"
# Mounting Holes 3
Sealed Volume 0.06 ft.³
Sealed F3 182 Hz
Vented Volume 0.14 ft.³
Vented F3 104 Hz

Reference GRS RSB901-1

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GRS 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. Who doesn’t know the legendary Bose 901 speaker?! Featuring a blue paper cone, every speaker cabinet contains four woofers. The GRS RSB901 will make your Bose 901 sound the way it used to. 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 ageing speakers has never been easier—or achieved better results. Every RSB901 speaker has been hand checked and tested. It features a premium-quality motor structure resulting in maximum performance and reliability for a good price.

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