Usher 8945A 7" Carbon Fiber/Paper Woofer

Brand:|Model: 8945A
The 8945A woofer is one of Usher's most popular drivers, featuring their low distortion motor system and a carbon fiber/paper blend cone.
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List Price$174.99
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Part # 296-600
  • Extremely rigid paper and carbon fiber blend cone
  • Low-distortion motor system provides great dynamics
  • Rubber surround provides optimal cone damping

Product Details

Usher 8945A 7" Carbon Fiber/Paper Woofer

The 8945A woofer is one of Usher's most popular drivers, featuring their low distortion motor system and a carbon fiber/paper blend cone. High excursion capabilities combined with the rigid yet well-damped cone provide powerful bass without a harsh midrange. This is one of the best all-around woofers for traditional 2-way bookshelf and compact floor-standing systems.

Product Specifications
  • Nominal Diameter7"
  • Power Handling (RMS)80 Watts
  • Power Handling (max)90 Watts
  • Impedance8 ohms
  • Frequency Response35 to 8,000 Hz
  • Sensitivity87 dB 2.83V/1m
  • Voice Coil Diameter1.625"
Thiele-Small Parameters
  • Resonant Frequency (Fs)35 Hz
  • DC Resistance (Re)5.8 ohms
  • Voice Coil Inductance (Le)0.46 mH
  • Mechanical Q (Qms)1.96
  • Electromagnetic Q (Qes)0.37
  • Total Q (Qts)0.31
  • Compliance Equivalent Volume (Vas)1.21 ft.³
  • Maximum Linear Excursion (Xmax)6 mm
Materials of Construction
  • Cone MaterialPaper / Carbon Fiber
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter7"
  • Baffle Cutout Diameter6.25"
  • Depth3.0625"
  • # Mounting Holes6
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.17 ft.³
  • Sealed F397 Hz
  • Vented Volume0.4 ft.³
  • Vented F361 Hz
Usher 8945A 7" Carbon Fiber/Paper Woofer
  • BrandUsher
  • Model8945A
  • Part Number296-600
  • UPC844632016448
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (11 Reviews)
  • Weight6.1 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 Usher 8945A 7" Carbon Fiber/Paper Woofer
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Usher 8945A 7" Carbon Fiber/Paper Woofer
Usher 8945A 7" Carbon Fiber/Paper Woofer is rated 4.6364 out of 5 by 11.
Rated 5 out of 5 by from Same as its Danish cousin half the price!I use two of these per speaker as the mids in a WMTMW configuration. I modeled both these and the ScanSpeaks that these are cloned from. The Ushers turned out to be almost identical. So I decided save some money and used the Ushers.In my speakers the 8945a's cover 300hz up to 2.5k. I could have crossed a lot lower then 2.5k but I wanted these speakers to play effortlessly, even at high volumes. Plus these 8945A can handle 1k-2.5k increadbley well!Some might consider this a bit over kill but the midrange clearity and detail is jaw dropping. Taking away the lower octaves allows all that midrange goodness to continue all the way up the volume knob!
Date published: 2015-04-27
Rated 4 out of 5 by from Usher for the winWoofer is just that good. It outputs a very tight bass and rich, detailed mid bass if you cut it right. Mine pair arrived with a with Fs of 30Hz and after an overnight break the fs dropped to 29.5Hz. I got it to 39.5Hz in 20 liters, on a four way configuration with Neo8-S, Neo3W, and 2x AMT mini 8 to cover the UHF. It was hard to get everything aligned with cuts on 530/4600/18000kHz. I got it tri-amplified using tk2050 based amps, with outputs in parallel, fully modified board. Part of the speakers filtering was done right on the feedback of the tk2050 board. This speaker makes for wonderful sound, it outputs unbelievable clarity and the sound stage is out of this world. Every aspect of this speaker is so good that i am running out of music options. Non-fatiguing, all day long listening and you don't even want to sleep. This system can reproduce any style with quality in all depts. Right now I am thinking on selling my B&W 802 set to make a wwwwmttmwwww .
Date published: 2013-10-09
Rated 5 out of 5 by from Great SoundLet me start off by saying that I am reviewing the 8 inch. PE no longer has the 8 but I felt compelled to share my experience with those who might be interested. I have been listening to a pair of Polk Audio 11T for the past 24 years. I decided to do a music only system and put it all together myself. This is my first venture. I did a lot of research about speakers and such but honestly I was just confused so I choose components based on reviews. What I came up with was the Usher 8945A 8" Carbon Fiber/Paper Woofer coupled with the Vifa XT25TG30-04 1" Dual Ring Radiator Tweeter and a premade Dayton crossover. I know some of you experts out there have just thrown your hands in the air but honestly the sound is amazing. The speaker cabinets I also bought from PE. These speakers sound much better than my Polks or should I say better to me. The stereo imaging and seperation is more pronounced and so is the tonal seperation from one instrument to another. In my rush to hear the speakers I have yet to add polyfil or a tuned port. Right now the bass response is good but I think once I complete the project it will be "wow". I am very pleased with the speaker cabinets. The quality is good; well made. For the price though I believe that PE should through in some polyfill and binding posts. Just my two cents. All in all my price break down is as follows.Ushers 8" $99 each on saleVifa Tweeters $32 eachDayton Audio XO2W-2.5K 2-Way Crossover 2,500 Hz $25 eachDayton Audio TWC-0.75CH 0.75 ft³ 2-Way Curved Cabinet Cherry $129 eachFor a total cost of around $550. I dont think I could have bought a pair of like speakers from Klipsch, Dynaudio, Energy, etc........ that would be comparable without paying two to three times that cost. Plus I had product plates made so they are Stedman Signature Series (my name) speakers, lol.If you have any questions shoot me an email at tsjazz2002@yahoo.comEnjoy
Date published: 2012-04-23
Rated 5 out of 5 by from brilliant wooferI have these installed in my car doors, they sound fantastic! Dark smooth sound, with very tight midbass. I have them low passed at 3khz LR4. There is a minor hump in response around 1200hz that needs to be dealt with otherwise I cant fault them.
Date published: 2012-03-20
Rated 5 out of 5 by from Excellent product at a good price.Its paradoxical to call any driver at the cost of the 8945A a bargin, but this is a great driver by all parameters and its significantly less expensive than the closest competition. Low distortion, great power handling, exceptional excursion beyond its rated x-max, excellent bass to 42 Hz in QB4 vented enclosure. Similar in design, construction and performance to the highly-regarded Scan-Speak Revelator, but at 1/2 the price.
Date published: 2011-09-18
Rated 5 out of 5 by from Great Replacement for Original Proac'sThe speakers haven't sound this good in a long time.
Date published: 2009-06-09
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Product Q&A

Get your questions answered from other customers
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Usher 8945A 7" Carbon Fiber/Paper Woofer

I want to run these in a 2 way active set up. The woofer will be in the lower door and tweeter in a pillar. Whats the highest crossover point can I us?

Asked by: Daymeian
These have an extended response up to about 2,500 Hz but this will droop off axis. I would try to cross around 1,500-1,800 Hz if your tweeter can handle that safely.
Answered by: MattP
Date published: 2015-03-02

How would this go in an IB setup?

Will be putting them in the kick panels of my car, thinking of making it IB.
Asked by: Pea And Ham
These will work fine for IB as long as you dont expect much below about 80 Hz from them.
Answered by: MattP
Date published: 2013-04-23

Would this work as a mid bass replacement in some old Polk 11Ts?

Asked by: tsjazz2002
It's a great choice, however, you want to look at SPEAKER BUILDING and then woofer selection guide to see if the box sizes are the same or very close. Also, make sure the impedance is the same and the crossover should be fine. Efficiency should be about the same as the other driver. You can do more homework by using an online box calculator which uses the specs to calculate response curves etc. ... If you feel like playing with that as well...
Answered by: markajh
Date published: 2012-08-21

What would the best sealed enclosure volume be for this woofer?

I am planning to use this woofer as a mid-range speaker in a 3-way system, crossed over at ~200 Hz and ~3000Hz.What would the best sealed enclosure volume be for this woofer?
Asked by: Maarten
The smallest enclosure the driver appears to work well in would be .3 cu ft. You can go up to approximately .75 before the low extension shows diminishing returns. The most level response (Qtc of .70) would be .3 cu ft though.If you want more low end response from the driver, I would suggest a ported box at .5 cu ft with a 2" port 12" long
Answered by: Musgofasa
Date published: 2015-02-19


from forum members who've built with these? Would be a nice feature to link all drivers to P.E. contributor designs - sell more as well.
Asked by: Soupy
The most popular design that we have using this woofer is linked below. The project page is listed here:
Answered by: mikevv
Date published: 2015-02-19
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