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

Brand:|Part # 290-922


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.
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Part # 290-922
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

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®.



Product Specifications
  • Nominal Diameter4-1/2"
  • Power Handling (RMS)30 Watts
  • Power Handling (max)60 Watts
  • Impedance1 ohms
  • Frequency Response83 to 15,000 Hz
  • Sensitivity91.5 dB 1W/1m
  • Voice Coil Diameter1"
Thiele-Small Parameters
  • Resonant Frequency (Fs)83.44 Hz
  • DC Resistance (Re)0.76 ohms
  • Voice Coil Inductance (Le)0.11 mH
  • Mechanical Q (Qms)2.4
  • Electromagnetic Q (Qes)0.43
  • Total Q (Qts)0.36
  • Compliance Equivalent Volume (Vas)0.24 ft.³
  • Mechanical Compliance of Suspension (Cms)1.08 mm/N
  • Diaphragm Mass Inc. Airload (Mms)3.38g
Materials of Construction
  • Cone MaterialPaper
  • Surround MaterialFoam
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialPolymer
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter5.2"
  • Baffle Cutout Diameter4.02"
  • Depth2.17"
  • # Mounting Holes3
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.06 ft.³
  • Sealed F3182 Hz
  • Vented Volume0.14 ft.³
  • Vented F3104 Hz
Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
  • BrandParts Express
  • Part Number290-922
  • UPC844632085055
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (26 Reviews)
  • Weight1.8 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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