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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They are amazing drivers for the money. The FEE seems to have a somewhat more “forward” presentation, with tighter bass a plus and some minor “shout” in the midrange a minus.
I notice that Fostex seems to have three approaches for getting full-range performance in the treble. Really looking forward to some big time fun. Anyway, but after fine tuning with stuffing inside and around the whizzer cone and placement the result is stunning and no kidding here. 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.
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 very thing turn out great! 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 think the match of horn geometry and damping with these drivers is critical to making them sound right.
Well, not the same as what you have in mind.
These drivers love DHTriodes. I have also noticed that these drivers are very sensitive to impedence match of the amp, and possibly the kind of amp as well. The 4KHz peak of the uncorrected driver is easily taken care off and it’s pretty inoffensive. They do have a tendancy to ‘shout’ if not properly implimented.
The FE series uses ‘whizzer’ cones to good effect and the FF series uses an aluminum center. Hope this helps, Marco. I have not tried or heard the E or E sigma. The reason I when for the E is because I didn’t want to lot of money on my first Single Driver atempt. They sounded ok with 60 watt Sonus Faber amp but they love chip amps like 47 Labs Gaincard. The other horn cabinet was running my FFK which has been broken in for a month, Anyway, if you looking for a cheap way to get in to single driver than Fostex is the best way to go.
They work well in my 8. I can’t figure out what the FE Sigmas are doing but they look cool. See you there, Jay.
However, it does have a more “wooly” and less tight bass. Taken alone, it rolls off a bit much for my taste. I hooked up a 4 ohm SS amp and they were DOA, but with a amp fostrx 8 ohm output, they were lively and nice. Posted by zobsky yahoo. Audio Asylum Thread Printer Get a view of an entire thread on one page.
I made all my reservations this weekend. I’ve never seen a real curve of the LE 8 and I don’t remember that much about their top end.
Stock, it lacks some treble but this is easily improved upon. I fosrex 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. But in my TQWT they sound excellent. We hope to see you at VSAC, fosex we have something [cool] to show you.
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. You’ll notice here that the response curves are extremely similar. The ‘wooly’ bass response may be due to overly damping the horn throat, although too little may result in ff165m midrange peak.
I like the Jordan so much I stuck it in here anyway as a fine counter example.
It excels at one very difficult thing – to still sound good after the honeymoon is over. Hi Jay Sounds like my experience. 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.
I popped one of them in one of my cabs to do an A-B.
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. The size f165k shape of the chamber directly behind the driver will help in this regard.
I got the FEE in the mail late in the week. The difference is quite startling. Magnetically shielded, they also make great computer speakers.