Fostex full ranges as Midranges? in sealed? - Page 3 - diyAudio
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Old 24th January 2013, 09:10 PM   #21
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Quote:
Originally Posted by rhythmsandy View Post
fx120 has rated 10w as pow input but with music pow 30w so 10 is seriously low as it might blow up isnt it? or do we need to consider 30w?
nice pic. Thats exactly how i was thinking of using the FW137, but it maybe unavailable (didnt check and probably should). Ive even considered using my A5s 300-10k or so with the ribbons0i have. I think i should cross higher to avoid their slight resonance at ~600 hz, and a bit of cone edge at 400hz that mine have. The woofer is my problem. OT anyway. The FX120 does look like an even better mid than i thought. (and FR too). Budget is key though i guess.
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Old 24th January 2013, 09:45 PM   #22
tvrgeek is offline tvrgeek  United States
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Look at the breakup problems. My testing found that the compromises made to try and force extended highs in the 125 cause serious midrange issues. The smaller ones, 105's, look far better. So do the smaller Fountek FR88's. Look at the TB's. As much as I want a Mark to fit the bill, I just don't think they are flat enough.

Why is the power low? Because they made the vc light with thin wire so it could produce upper mids and excite the cone into breakup giving the impression of high frequency balance. Don't be fooled by this. 10W at 2K will split your head open. They should be able to do 500 to 5K just fine.
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Old 24th January 2013, 09:45 PM   #23
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I have experience with fostex, mark audio, audax and focal. Fostex would be my last choice for anything really. I had the fe127 and im glad its not in my life anymore. the mid is forward, vocal are fuckin aggressive. you would be MUCH better with a audax pr170
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Old 24th January 2013, 10:58 PM   #24
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Quote:
Originally Posted by adason View Post
dave, how can von schweikert clain their speaker at 94 dB sensitivity when FX120 is 89 dB/w/m?
marketing department, Or maybe they ar ebuying enuff to get a 4 ohm version (and then a little less help from marketing)

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Old 24th January 2013, 11:26 PM   #25
Dissi is offline Dissi  Switzerland
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The Fostex FE126En has a voice coil diameter of only 20 mm and thus a low power rating. Nevertheless, due to the high sensitivity it makes more than 100 dB and the 15 watts are not really an issue. More problematic is the low xmax, limiting the maximum spl below 400 Hz. For that reason it is a pure midrange driver and should not be used as fullrange (even when some people do). Unfortunately the range above 1 kHz is quite ragged, no reason to expect the nirvana.

MaxSPLFostexFE126En.jpg
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Old 25th January 2013, 12:16 AM   #26
holdent is offline holdent  Canada
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Dissi:

Is your SPL graph for the FE126En? It looks like that of the older FE126E - Troels Gravesen has measurements of one here Fostex FE126E +. I expected that the En version would be better.

Troels used the FE126E to develop a 2-way with a Fountek NeoCD3 ribbon with mixed to good results.

Last edited by holdent; 25th January 2013 at 12:24 AM.
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Old 25th January 2013, 12:39 AM   #27
Dissi is offline Dissi  Switzerland
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Quote:
Originally Posted by holdent View Post
Is your SPL graph for the FE126En?
Yes, it's the FE126En, based on a measurement of the german loudspeaker magazine HobbyHiFi. But the curve is not really a frequency response, which would be measured at a constant input voltage. It is the spl resulting at maximum excursion and maximum power consumption.
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Old 25th January 2013, 12:41 AM   #28
tuyen is offline tuyen  Australia
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hi rhythmsandy,

check this 3-way design out. i have had thoughts of giving it a go myself someday. I can see the potential in something like it, when powered by a low powered high quality amp.

tube friendly loudspeaker
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Old 25th January 2013, 12:42 AM   #29
ra7 is offline ra7  United States
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I would recommend the vifa tc9fd or the scanspeak 10f. State of the art midrange drivers. The vifa is dirt cheap. You can buy and experiment.
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Old 25th January 2013, 01:03 AM   #30
adason is offline adason  United States
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i thing we are all wasting our times here folks, rythmsandy does not care about hifi, he just want loud midrange, there is plenty driver for that
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