Fostex Speaker Model. Part Number. ” FULL RANGE, FFK. • ” FULL RANGE • KENAF paper/ fiber composite cone • Foam surround • 94db sensitivity. Features. ♢mm ( in) cone type full range. ♢8 ohm impedance. ♢fo to17kHz frequency response. ♢94dB sensitivity at 1W/1m (ft). ♢kg ( lb) net. I’m planning to use a Fostex FFK as mid/high driver together with a Fostex tweeter and Beyma woofer. Active x-over between de Beyma.

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I hooked up a 4 ohm SS amp and they were DOA, but with a amp with 8 ohm output, they were lively and nice. This is a fosted nice driver but I have to conclude that a ribbon tweeter or something similar would put the cherry on top. Anyway, but after fine tuning with stuffing inside and dostex the whizzer cone and placement the result is stunning and no kidding here. The FEE has maybe just fostdx tad less bass but the FFK has been broken in for some time now and has also had some damping material wrapped around its ribs to absorb nasty reflections.

This one, however, needs some kind of tweeter and while I think the real maximum excursion is bigger than the spec, I would treat it gently with the “Jurassic Park” sound track. You’ll notice here that the response curves are extremely similar. Really looking forward to some big time fun.


The difference is quite startling. Posted by zobsky yahoo.

I can’t figure out what foshex FE Sigmas are doing but they look cool. The 4KHz peak of the uncorrected driver is easily taken care off and it’s pretty inoffensive. Hi Jay Sounds like my experience. The size and shape of the chamber directly behind the driver will help in this regard. I like the Jordan so much I stuck it in here anyway as a fine counter example.

High Efficiency Speaker Asylum

They work well in my 8. It has 96dB sensitivity and if you bring in a good tweeter, maybe a nice ribbon above 5K, I think you’ll really have something.

I have also noticed that these drivers are very sensitive to impedence match of the amp, and possibly the kind of amp as fff165k. Stock, it lacks some treble but this is easily improved upon. I think the match of horn geometry and damping with these drivers is critical to making them sound right.

Magnetically shielded, they also ofstex great computer speakers. Anyway, if you looking for a cheap ff165kk to get in to single driver than Fostex is the best way to go. I made all my reservations this weekend. Hope this helps, Marco.

We hope to see you at VSAC, since we have something [cool] to show you. As pointed out before, it appears that the high-efficiency drivers make the most out of a current source and here we don’t see any particular advantage. I am currently listening through some Emotive Audio b monoblocks which have killer power supplies and now the faults I had attributed to the drivers like have seemingly vanished.


WANTED: Fostex FFk full range drivers

I popped one of them in one of my cabs to do an A-B. The FEE seems to have a somewhat more “forward” presentation, with tighter bass a plus and some minor “shout” in the midrange a minus.

The ‘wooly’ bass response may be due to overly damping the horn throat, although too little may result in a midrange fostfx. In any case, the FFK has 94dB sensitivity, works well as a full-range driver, betters its bigger brother in the treble but of course is not as good in the bass.

But in my TQWT they sound excellent. I’ve never seen a real curve of the LE 8 and I don’t remember that much about their top end.

Fostex FF165K 20% off sale

It excels at one very difficult thing – to still sound good after the honeymoon is over. These drivers love DHTriodes.

I was going to go with the 8″ Fostex but I don’t want bigger box and the 6. The other horn cabinet was running my FFK which has been broken in for a month, But very thing turn out great!