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

Overview
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
Part # 
290-922
Weight: 1.8 lbs.  
IN STOCK
List Price$39.99
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Part # 290-922
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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
    (13 Reviews)
  • Weight1.8 lbs.
  • California Prop 65

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

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Reviews

Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm
Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm is rated 4.7692 out of 5 by 13.
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
Rated 5 out of 5 by from Bose speaker 901Excellent fit on a bose 802, same ohms. Good quality speaker. Sounds great.
Date published: 2013-10-17
Rated 5 out of 5 by from Replacement Speaker Drivers for Bose 901My Bose 901 Series IV speakers have drivers with deteriorated foam surrounds (a common problem with older speakers). My first attempt at repair was to apply the 260-910 Surround Kit to my existing drivers. I'm not a complete klutz, but I was not successful installing the replacement surrounds with sufficient accuracy to restore the drivers. It takes great dexterity and care to position the surrounds, and I was just not up to the task. Seeing that the model 290-922 Replacement Drivers were available, I bought a complete set and installed them. The replacements went without a hitch (it took about four or five hours to do both speaker cabinets carefully), soldering the leads to the tabs on the replacement drivers. The results are excellent; the speakers sound like new. Because the drivers are new, I am confident that the magnets are strong and the cones are aligned properly -- two things I would have had doubts about had I refurbished the original drivers. I'm delighted with the results. Whether you choose to replace the foam surrounds or replace the drivers, you will find this excellent YouTube video helpful: http://www.youtube.com/watch?v=dbGfFw650gQ
Date published: 2013-08-01
Rated 5 out of 5 by from Great Little SpeakerI used this for a custom designed speaker cabinet and it performs great. I heard about a "Break In Period" but I didn't seem to notice any issues.
Date published: 2013-01-29

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

Can these speakers be used as replacements on a 2007 Nissan Versa?

Asked by: JUICYJUICE
If the original drivers were the 1 ohm 4-1/2" Bose type, this will work as a replacement.
Answered by: MattP
Date published: 2014-07-21

Do you have these speakers in 4 to8 ohm 

Asked by: Dutch63
Unfortunately we do not have these in any other impedance than 1 ohm.
Answered by: MattP
Date published: 2014-06-24

Will this work in my Bose Free Space 51 Outsoor in ground speakers?

Asked by: Dthomas68
These would not be a good choice for that speaker. IT is one ohm and the cone is not weatherized at all.
Answered by: Chrisf
Date published: 2014-06-06

Can these speakers be used as replacements in my Bose 131 marine speakers

Asked by: Obsession87
No, it's a 1-ohm speaker, the 131's are 4-ohm. This speaker could easily damage your amplifier.
Answered by: Eric Chandler
Date published: 2014-06-03

Need 2 full range speakers for a 2 ohm load for a personal project. These are the only ones with the range, spl, and ems that seem to fit (perfectly). Will they work?!? Or too good to be true?

Asked by: CharlesNCharge
These sound like a great option if all other specs are a good fit. Simply wire them in series for a 2 ohm load and you should be good to go.
Answered by: MattP
Date published: 2014-05-06

Is there any wiring scheme that would work with 8, 6- ohm replacements to get anywhere near a 8 ohm total load? Do I understand correctly that series/parallel connection of 8, 6-ohm speakers would be a total of 6 ohms?

Asked by: mindblown
The only way to wire eight 6 ohm speakers will net you either 3 or 12 ohms.
Answered by: MattP
Date published: 2014-04-16

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