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The FF85k seems to
be a bit of an orphan in the Fostex line, althou designated as part of the FF series,
it comes with the more advanced UDR tangential surround from the Sigma series and
the aluminum dustcap is attached to the end of the voice coil turning it into a true
tweeter.
Natural cone with black EnABL
is standard for FF85KeN -- other
colors are available.
There is a bewildering number of combinations of EnABL colours and coloured cones.
If there is something you'd like just contact me -- i'm going to try to accomodate
most requests, but it may require waiting for the next batch of drivers.
Early FF85k will be available
in Natural with Black,
Price for FF85eN is $160 USD/matched
pair. $15 surcharge for custom non-standard colours.
Modifications include:
- reduce resonances & reflection
back thru the cone including basket damping and shaping. A wool felt disk is supplied
that can be attached to the magnet to reduce reflections off the magnet
- the cones are EnABLed**. This
dramatically reduces the "hall-of-mirrors" haze, increasing downward dynamic
range and revealing subtle information in the music that fills out detail that gives
the brain more data to recreate the event.
- the precoat and the post-coat
considerably reduces the cone noise (imagine paper fibres rubbing together as the
cone vibrates) thus further lowering the noise floor
**(H. O. Purvine, U.S. patent # 5,304,746 publication date April 1994) Read more about EnABL
The process the drivers go thru:
- Each batch of drivers (minimum
20) is run-in for 100+ hours (check for duds -- none so far).
- The drivers are then modified
basket, cone
- matched into pairs
- T/S parameters are measured thru-out
for data collection purposes and to stream drivers into pairs
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