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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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 Ff1165k sound track. Really looking forward to some big time fun. 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.
We hope to see you at VSAC, since we have something fostsx to show you.
I notice that Fostex seems to have three approaches for getting full-range performance in the treble. I’ve never seen a real curve of the LE 8 and I don’t remember that much about their top end. 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. I have not tried or heard the E or E sigma.
I was going to go with the 8″ Fostex but I don’t want bigger box and the 6. Stock, it lacks some treble but this is easily improved upon. 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.
You’ll notice here that the response curves are extremely similar. 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. Well, not the same as what you have in mind. I have also noticed that these drivers are very sensitive to impedence match of the amp, and possibly the kind of amp as well.
But fostrx thing turn out great! However, it does have a more “wooly” and less tight bass. 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 can’t figure out what the FE Sigmas are doing but they look cool.
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.
The size foste shape of the chamber directly behind the driver will help in this regard. Hope this helps, Marco. I like the Jordan so much I stuck it in here anyway as a fine counter example. Posted by zobsky yahoo. The FE series uses ‘whizzer’ cones to good effect and the FF series uses an aluminum center. 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 – a pair of full range drivers – Audio Asylum Trader
They sounded ok with 60 watt Sonus Faber amp but they love chip amps like 47 Labs Gaincard. The difference is quite startling. The FEE seems to have a somewhat more “forward” presentation, with tighter bass a plus and some minor fostec in the midrange a minus. 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.
These drivers love DHTriodes. Anyway, if you looking for a cheap way to get in to single driver than Fostex is the best way to go. Fosted think the match of horn geometry and damping with these drivers is critical to ff165 them sound right. The 4KHz peak of the uncorrected driver is easily taken care off and it’s pretty inoffensive.
I popped one of them in one of my cabs to do an A-B. Magnetically shielded, they also make great computer speakers.
They work well in my 8. The other horn cabinet was running my FFK which has been broken in for a month, Hi Jay Sounds like my experience. See you there, Jay. I got the FEE in the mail late in the week. It tf165k at one very difficult thing – to still sound good after the honeymoon is over. The ‘wooly’ bass response may be due to overly damping the horn throat, although too little may result in a midrange peak. I made all my reservations this weekend.
Taken alone, it rolls off a bit much for my taste. They are amazing drivers for the money. The reason I when for the E is because I fostrx want to lot of money on my first Single Driver atempt. I think they are a bit too big for the driver, especially after reading the article about TL and pipe speaker in August 03 Audio xpress. Anyway, but after ff165m tuning with stuffing inside and around the whizzer cone and placement the result is stunning and no kidding here.