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Diaphragm for Foster Fostex Speaker D-420

Part Number:D-420
Diaphragm for Foster Fostex Speaker D-420
SS Audio Speaker Diaphragm D-420
Diaphragm for Foster Fostex Speaker D-420
Your Price:$16.95
List Price:$24.00
You Save:$7.05


In Stock

Quantity Pricing

  • 2 - 3
  • $16.00
  • 4+
  • $15.00
Foster & Fostex Speaker Diaphragm Part # D-420

  • Voice coil: 1" (25mm)
  • Diameter: 1.75" (45mm)
  • Length: 2.875" (72mm)
  • Impedance: 8 ohm, DCR: 7 ohm
  • Phenolic dome with copper voice coil on Nomex former.
  • Fits Foster & Fostex N30, 025H30, H025N30, H025N27, H025N28, FT300H drivers and many others
  • See FITS MODELS tab for all models. 
  • We also sell the long shaft Cerwin Vega version of this diaphragm. Part # D-420L
  • See our Cerwin Vega diaphragms page for details.

  • Our most popular replacement diaphragm!
5 Stars
End User
I bought some used speakers and found the mid range was blown, looking for a replacement and found that I could just replace the diaphragm was was easy and was a no brainer. No need to replace the whole speaker when you can replace just the diaphragm!
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Reviewed by:  from Houston. on 4/17/2017
5 Stars
plant manager
excellent product. good quality. quick shipping, under a week for regular ground shipment. much cheaper than replacing the whole tweeter. the sound is like new. highly recommended.
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Reviewed by:  from ontario, canada. on 3/24/2017
5 Stars
they work grate
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Reviewed by:  from Reidsville. on 2/27/2017
5 Stars
Residential Basement Bar Sound Guy
Customer support was excellent! Explained what I needed and cross referenced my part number. Very helpful! Fast shipping, fair prices will bring me back when the need arises! Many Thanks!
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Reviewed by:  from Blue Ridge GA. on 12/4/2016
5 Stars
The speakers arrived very well packaged and sound extremely good in my Speaker system. Thanks for carrying these replacements at a reasonable price
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Reviewed by:  from British Columbia . Canada. on 9/9/2016


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