Good evening everyone. I thought I would share pictures between the two Fostex Fe EN vs the Fe NV driver’s. I have not heard the new Fostex FE126NV drivers next to the FE126EN drivers which are one of my favorites. So I will be doing a project with the New NV drivers soon. So here is my take on each driver Just looking at them both side by side.
Fostex FE126EN Driver’s.
1. Has a bigger magnet.
2. The cone is almost very light and almost see through.
3. Heavier.
4. Nice live sounding.
5. You get more Info on the drivers Mechanical specs and small parameters.
6. Has been around a while.
Fostex FE126NV driver’s.
1. Cleaner wire hiding and no white dots on the cone from soldering.
2. The magnet is not so big and is more rounded even.
3. Gold plated terminal’s and are spaced out a little more from each other.
4. Frame is more of a glossy black and not a coated black finish.
5. The cone looks cleaner around the edges and the middle dust cap.
6. The cone looks more stiffer and has sparkling on the cone? Fairly dust 😀
7. Shipping with a plastic speaker cone protector.
Things I don’t care for in each driver.
1.Still has a steal frame and can cause a problem if you don’t dampen it some how.
2. Magnet is either to big or small nothing In the middle or a different type of magnet material.
3. NV has very little info on published driver Info like T.S.
4.FE has a sloppy look to around the dust cap and outer edge of the cloth sound.
5. Charges a lot for the drivers.
This is all I can think of. Again I will be working on a project soon with the new drivers and I will post pictures and give my honest opinion. Cheers Jeff
Fostex FE126EN Driver’s.
1. Has a bigger magnet.
2. The cone is almost very light and almost see through.
3. Heavier.
4. Nice live sounding.
5. You get more Info on the drivers Mechanical specs and small parameters.
6. Has been around a while.
Fostex FE126NV driver’s.
1. Cleaner wire hiding and no white dots on the cone from soldering.
2. The magnet is not so big and is more rounded even.
3. Gold plated terminal’s and are spaced out a little more from each other.
4. Frame is more of a glossy black and not a coated black finish.
5. The cone looks cleaner around the edges and the middle dust cap.
6. The cone looks more stiffer and has sparkling on the cone? Fairly dust 😀
7. Shipping with a plastic speaker cone protector.
Things I don’t care for in each driver.
1.Still has a steal frame and can cause a problem if you don’t dampen it some how.
2. Magnet is either to big or small nothing In the middle or a different type of magnet material.
3. NV has very little info on published driver Info like T.S.
4.FE has a sloppy look to around the dust cap and outer edge of the cloth sound.
5. Charges a lot for the drivers.
This is all I can think of. Again I will be working on a project soon with the new drivers and I will post pictures and give my honest opinion. Cheers Jeff
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There's a full data sheet here: https://www.fostexinternational.com/docs/speaker_components/pdf/FE126NV.pdf
jeff
How do you define Xmax?
Serious question, because in a sense, there's no such thing. Xmax is not part of Small's work, nor is it a fundamental mechanical or electrical value. There are many different ways of generating a number you can call 'Xmax', most of which give different values if applied to the same drive unit, and none of them really tell you very much. It's at best a 1st order guesstimate for HD, no more, and not necessarily a very accurate one.
Serious question, because in a sense, there's no such thing. Xmax is not part of Small's work, nor is it a fundamental mechanical or electrical value. There are many different ways of generating a number you can call 'Xmax', most of which give different values if applied to the same drive unit, and none of them really tell you very much. It's at best a 1st order guesstimate for HD, no more, and not necessarily a very accurate one.
Dear Jeffrey 01,
I don't think Xmax is necessary for box design.
For example, 126En has Xmax = 0.35mm, but there is no problem in practical use.
I don't think Xmax is necessary for box design.
For example, 126En has Xmax = 0.35mm, but there is no problem in practical use.
Thanks Scottmoose. So many things I learn on a daily basis. Thanks for explaining the xmax issue.
Absolutely, nice work on the gasket🙂
I suspect the Nv series units partly reflect a more diverse audience that doesn't necessarily want heavily damped drivers that had at least an eye on use with SET amplifiers.
I suspect the Nv series units partly reflect a more diverse audience that doesn't necessarily want heavily damped drivers that had at least an eye on use with SET amplifiers.
What’s interesting ScottMoose is the New FE83NV & the FE103NV drivers that I have (waiting to build for a few family members). Doesn’t have that glitter like effect to the cone like the FE126NV does? It must be a different type of coating on the cone I wound expect? The cones seem more ridged then the older EN series. Still one of my favorites is the FF85WK drivers. Would like to try the step up of the FF105WK’S one day. Thanks for you advice again. Jeff
The Xmax is often seen as the difference in hight of the voice coil and the magnet gap. But the magnet field is not a totaly straight line across the metal parts across the gap so X Linear X max is a fuzzy measurement. How linear is linear? So that the xmax of 0.35mm does not mean that the driver hits a brick wall past 0.35 mm. And how unlinear it becomes past that depends on the design. And for a given design how audiable the unlinearity is depends on the implementation. Unlinear beaviour at 20-200 Hz att >100 dB where our ears are unlinear is a different thing than at 80 db in the 500-5000 Hz range.
