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

      €33,02€39,95 >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

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      Reviews

      5 from 5Based on 8 reviews
      Review this product
      2 of 5
      Not the same sound as the original… much less deep
      By Mr.S on 6 November 2021
      5 of 5
      Sehr guter Ersatz.
      By Heinz-Juergen H. on 22 April 2021
      Show more

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      Complete your purchase

      RSB901-1 Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
      € 33,02
      € 39,95
      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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