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.
  • 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
Part # 
Weight: 1.8 lbs.  
List Price$39.99
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Buy 18-up$18.50
Part # 290-922
Qty:  EA
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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
    (16 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
Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm is rated 4.75 out of 5 by 16.
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
Rated 5 out of 5 by from Less expensive than OEM, but betterI bought some basket case 901's that had 18 bad drivers. I needed to simply replace them. WARING: DO NOT even think of the garbage panasonic "bose 901" drivers. They don't fit without redrill, they are 6 ohms and sound horrible. The parts express drivers are equal to, probably a little superior to stock bose drivers. They fit perfectly. They work perfectly. They are also at least $10 less per driver than OEM Bose. Absolutely recommended!
Date published: 2014-05-03
Rated 5 out of 5 by from Great replacementJust as good as the original and a fantastic price !
Date published: 2014-04-04
Rated 5 out of 5 by from Bose Roommate ReplacementsI purchased a pair of these to replace the aging drivers in an original pair of Roommates from '88. The original drivers, while still intact and serviceable, had started to become muddled in the midrange and lost a lot of high-end clarity. These speakers were rescued from a middle school computer lab several years ago, so I can only imagine the torture they went through for the better part of 20 years.A side-by-side comparison of the old vs new was (literally) music to my ears. The highs were crisp, the mids tight and the bass somewhat reserved. I suspect that the "well broken in" originaly drivers had much better bass response due to being beaten to a pulp, so I expect the bass response to continue to improve the more I use them. I have noticed the sound slowly changing as I've listened to them the past couple weeks, so I assume that if this trend continues the sound will be as it should be soon. For now, a simple EQ tweak makes everything happy and brings the bass more in line with how they used to sound.Just be careful with the spade connectors, mine were perilously close to shorting out on the magnet with the female terminal slipped on so I would highly recommend using an insulated female connector.
Date published: 2014-03-02
  • 2015-04-21T07:01CST
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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 tech@parts-expresss.com  for a prompt reply.
Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm

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, tech@parts-express.com 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.http://www.parts-express.com/1-4-%2816-14%29-female-disconnect-crimp-terminal-blue-50-pcs--095-280
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

Do you know the Xmax of these drivers?

Asked by: Rids1
This is considered an even-hung driver, the listed Xmax will be 0 mm. Actual useable cone excursion will be closer to 4-6mm peak to peak.
Answered by: MattP
Date published: 2014-12-04
  • 2015-04-21T08:32CST
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