02 October 2012

Fostex FE206En Double Bass-Reflex Speakers

Fostex FE206En Double Bass-Reflex Speakers

Fans of low power tube amps love high-sensitivity full-range drivers like the 200 mm Fostex FE206En and with good reason.  The drivers are relatively inexpensive, they sound good and they do not require a crossover.  The main reason for the fan fare is because of their high sensitivity (96 dB / 1 W / 1m), which makes them ideal for use with very low power amplifiers.  However, the high sensitivity and wide frequency bandwidth of the driver come at a cost - a very low mass paper cone and a tiny excursion (Xmax=0.8 mm).  This adds up to mean that extracting bass from the Fostex FE206En is often a challenge.  The common solution to this challenge is a large back-loaded horn type enclosure.


Fostex FE206En Back-Loaded Horn Speaker Enclosures 
The problem is that these elaborate back-loaded horn type enclosures often require a skilled woodworker to construct.  The Fostex FE206En driver datasheet also include a recommended enclosure plan for a suitable bass-reflex type enclosure which is far easier to construct.  Mark has built a couple sets of the Fostex FE206En double bass-reflex speakers and reports that the simple enclosure works well with the FE206En full-range driver.


Fostex FE206En Double Bass-Reflex Speakers 
Since Mark will be using the speakers as part of his home theater setup, undercoating paint was used for a stipple like flat black and non-reflective finish.  Mark reports that the speakers are an excellent mate for use with his 6EM7 SET amp.  Full details are available on the Fostex FE206En Double Bass-Reflex Speaker project page.


More Single Driver DIY Speaker Projects



4 comments:

  1. Where can I find the cabinets in the first picture?
    "Fostex FE206En Back-Loaded Horn Speaker Enclosures"

    ReplyDelete
  2. Hi, the horn speakers are an early version of the Dallas II horn for the FE206E. You can find the latest plans here: http://p10hifi.net/FH/download/DallasII-plans.pdf

    Cheers

    ReplyDelete
  3. Thank you for the reply. I took a look at the plans however the partially finished ones in the picture don't seem to be made "to print". The picture shows a really nice piece of work.
    My question is: are there any kits available "like the ones in the picture"? The ones you recommend look pretty close to the Fostex from Madisound.
    Thanks.

    ReplyDelete
  4. I'm really keen to source plans for the pictured cabinets too. I have the DallasII plans - but the pictured ones with the curves look to be so much better - any ideas if they are available? Thanks

    ReplyDelete

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