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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Hi Jay Sounds like my experience.

FOSTEX FF165K Driver/pair

I think foste are fotsex bit too big for the driver, especially after reading the article about TL and pipe speaker in August 03 Audio xpress. 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. I have not tried or heard the E or E sigma. It excels at one very difficult thing – to still sound good after the honeymoon is over.

The reason I when for the E is because I didn’t want to lot of money on my first Single Driver atempt. I’ve never seen a real curve of the LE 8 and I don’t remember that much about their top end.

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This is a very nice driver but I have to conclude that a ribbon tweeter or something similar would put the cherry on top. The FEE has maybe just a 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. I made all my reservations this weekend. The Foostex series uses ‘whizzer’ cones to good effect and the FF series uses an aluminum center. Magnetically shielded, they also make great computer speakers.

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. They are amazing drivers for the money. This one, however, needs some kind of tweeter and while I think the real maximum excursion is bigger than fostfx spec, I would treat it gently with the “Jurassic Park” sound track.

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I have also noticed that these drivers are very sensitive to impedence match of the amp, and possibly the kind of amp as well. I was going to go with the 8″ Fostex but I don’t want bigger box and the 6.

Really looking forward to some big time fun. These drivers love DHTriodes. Audio Asylum Thread Printer Get a view of an entire thread on one page. I like the Jordan so much I stuck it in here anyway as a fine counter example.


Taken alone, it rolls off a fosted much for my taste. We hope gf165k see you at VSAC, since we have something [cool] to show you. The size and shape of the chamber directly behind the driver will help in this regard. It has 96dB sensitivity and if you bring in a good tweeter, maybe a nice ribbon above 5K, I fistex you’ll really have something.

I notice that Fostex seems to have three approaches for getting full-range performance in the treble.

You’ll notice here that the response curves are cf165k similar. The difference is quite startling. I got the FEE in the mail late in the week. See you there, Jay. However, it does have a more “wooly” and less tight bass.

Speaker Components

The Fostdx seems to have a somewhat more “forward” presentation, with tighter bass a plus and some minor “shout” in the midrange a minus. 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. Of course, this could be dependent on a less-than-optimal match with the backhorn, but I suspect it also has to do with the driver’s higher Qts.

They work well in my 8. Well, not the same as what you have in mind. I think I am going to put the FFK in a little bass reflex cabinet and coupled with my newly acquired radioshack supertweeters, should make for an interesting bedroom speaker.


FOSTEX FFK Driver/pair – 管迷精品音響

I popped one of them in one of my cabs to do an A-B. 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.

The other horn cabinet was running my FFK which has been broken in for a month, I can’t figure out what the FE Sigmas are doing but they look cool.

I would have assumed that the FEE Sigma was intended to be a direct replacement for the FEE, but the mid and top end make me rethink that. The ‘wooly’ bass response may be due to overly damping the horn throat, although too little may result in a midrange peak. They do have a tendancy to ‘shout’ if not properly implimented.

They sounded ok with 60 watt Sonus Faber amp but they love chip amps like 47 Labs Gaincard. But in my TQWT they sound excellent. Posted by zobsky yahoo. Anyway, if you looking for a cheap way to get in to single driver than Fostex is the best way to go.