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

    € 24,75€ 29,95 >10 In stock: delivery time 1-4 business days
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    Product description

    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.

     

    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®.

    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
    91.5 dB 2.83V/1m
    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)
    83.44 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

    Reviews

    5 from 5Based on 7 reviews
    Review this product
    5 of 5
    Sehr guter Ersatz.
    By Heinz-Juergen H. on 22 April 2021
    5 of 5
    Perfecte vervangluidspreker
    By Luc S. on 15 September 2020
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    RSB901-1 Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
    € 24,75
    € 29,95
    RSB901-1 Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
    >10 In stock: delivery time 1-4 business days
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