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.
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List Price$39.99
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Part # 290-922
  • 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
    (19 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.

View similar products to the Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
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Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm is rated 4.5789 out of 5 by 19.
Rated 1 out of 5 by from Bose 901 replacement speakersPros: Speakers fit perfectly in the 901 cabinets. Adapting to the spade connectors was very easy. Speakers were shipped immediately after placing my order. Items were packed very well and arrived in perfect condition.Con: They don't sound very good when compared with the stock 901 speakers. Very hollow sound. Bass and treble are ok - perhaps a 7 on a 1-10 scale. Mid-range is hollow/muddy sounding and there's nothing I can do about it no matter how much I work with the Bose equalizer and my 10 band equalizer. Also, the new speakers cannot handle near the power that the originals could.
Date published: 2015-06-09
Rated 5 out of 5 by from Great Drop-in Replacement for Bose 802-IIWas requested to repair a Bose 802-II speaker at a local elementary school who reported no sound from the speaker. Like this whole series of Bose speakers, they have 8 drivers in a series array with frequency modifying capacitors across some. After pulling out one driver I found it to be open circuited, not allowing any sound from the rest. Shorted around it to confirm all others worked. Ordered the replacement from PE same day, it arrived 2 days later. Only difference in the replacement was the wire connections. Original was wire-wrapped, replacement uses tabs/slip on lugs. Plan on modifying the wire ends appropriately and know these wires are short so not much room to work, since you can't open the cabinet. All work is done through the driver hole. Once in place, the speaker sounded as good as the original (I'm not a great fan.) Returned the speaker to the school 3 days early and they were ecstatic. Only 3rd party drop-in I have seen for this unusual driver shape and much less than original equipment replacement.
Date published: 2015-05-10
Rated 5 out of 5 by from awesome servicegreat sounding speakers on time delivery no hassles
Date published: 2015-04-23
Rated 5 out of 5 by from Works great for 1986 CorvetteI bought these to replace the stock Bose drivers in my 1986 Corvette. They mount exactly the same and sound much better than the originals! The only difference is the terminals where you need to either adapt with some female to male terminals or cut the terminals on the speaker to the size of the stock wire terminals. Easy stuff.Very happy.
Date published: 2014-11-28
Rated 4 out of 5 by from Sound Great, easy fitThe speakers were not an exact, exact fit in my bose 901 series speakers but just a small fraction off. Screw went in fine and I am not complaining at all. Sound great and my 901 restoration is finally complete. Replaced cones, then some speakers after my cone replacement job sounded meh, then more speakers as I got greedy. But very happy.
Date published: 2014-09-02
Rated 5 out of 5 by from great buyI used these to replace the blown bose speakers in my audi a4 b5 01.. bought four of them for thedoors. The rear doors had 6.5 so i had to make a wood baffle. I seriesed the doors together front and rear doors together left and right for a 2ohm load. Removed the bose amp and installed a sundown sax100.4. I used 6.5 kicker coax in rear deck... the bose replacement speakers sound great! Cant wait to buy more of these for other projects. Youll need quarter inch femal connectors for the terminals
Date published: 2014-08-15
  • 2015-07-31T07:27CST
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  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_19
  • loc_en_US, sid_290-922, PRD, sort_mostRecent
  • clientName_PartsExpressInternational

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email  for a prompt reply.
Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm

Will this Part # 290-922 work for me?  I'm looking for a replacement for Bose 111 outdoor speaker.  4 1/2".  Original has Power Rating of 40W, 4 OHMS.  I don't need Bose, just a speaker that will fit the original casing.  

Asked by: khball
Unfortunately this is only designed for the 901 series speakers due to it's 1 ohm impedance. We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-05-18

Will these fit and work in the older 801 wooden cabinet version?

Asked by: Rick Q
Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: RobTaylor
Date published: 2015-04-17

For you Bose 901 replacement drivers, do you sell clips that will fit the flat brass terminals that the internal speaker wires connect to?

Asked by: Dannl
These terminals are 1/4" wide so the crimp on disconnects below would be the proper size.
Answered by: MattP
Date published: 2015-03-12

Will these 4 and a halfs fit in the factory bass box in a 99 Audi A6

Asked by: john6912
Chances are these are not the right impedance for that application. These are designed for the 901 speakers only.
Answered by: MattP
Date published: 2015-03-10

Is it possible to get this driver in 4 ohm so it could be used to replace a bad driver in a first generation Bose 151 outdoor speaker?  Thanks.

Asked by: 1957Teddy
I am sorry, we do not have a 4 ohm version available at htis time, but I will pass along the suggestion to the product managers.
Answered by: Chrisf
Date published: 2015-01-05

Will these work in Bose 901 series II? Your listing says series III or later. What could I use in my series II?

Asked by: Jim J J
This depends on how the drivers are wired in the system. This is a 1 ohm driver, so the drivers in the 901 will have to all be wired in series in order for this to work as a replacement.
Answered by: MattP
Date published: 2014-12-05
  • 2015-07-30T07:49CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.5
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_29
  • loc_en_US, sid_290-922, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational
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