Hello to all,
Please, help me to understand more the main differences between this 3 Fostex drivers:
FE206EN: https://www.fostexinternational.com/docs/speaker_components/pdf/FE206En.pdf
FE208EZ:
https://www.fostexinternational.com/docs/speaker_components/pdf/fe208ez.pdf
FE208-SOL
https://www.fostex.jp/wp/wp-content/uploads/2017/09/FE208-Sol_Manual.pdf
I can see that the FE206EN is the most light one, cone material is similar to Fe208-SOL, and this both extends till 20kHz, but the FE0280-SOL is much heavier than both, almost 9kg! per driver, meanwhile the FE208EZ extends only till 14kHz, it's heavier than FE206EN and half of the weight of the FE208-SOL.
FE208EZ and FE208-SOL are similar in price, FE208-SOL a little more expensive, meanwhile FE206EN is much cheaper than both.
What are the differences between this 3 drivers when analyzing the impedance curve? I noticed there's a big deep on the FE208SOL down to 20db, meanwhile the FE206EN and FE206EZ have a more similar impedance curves.
FE208SOL is a much better drivers on the bass frequencies department?
Appreciate the help from all, in order for me to understand better the most significant differences between this drivers.
I'm not so versed on deep technical language, still learning, so please, be patience, I'm doing my best to understand
You guys are being great! Already thanks everybody for the help.
Best Regards sirs.
Please, help me to understand more the main differences between this 3 Fostex drivers:
FE206EN: https://www.fostexinternational.com/docs/speaker_components/pdf/FE206En.pdf
FE208EZ:
https://www.fostexinternational.com/docs/speaker_components/pdf/fe208ez.pdf
FE208-SOL
https://www.fostex.jp/wp/wp-content/uploads/2017/09/FE208-Sol_Manual.pdf
I can see that the FE206EN is the most light one, cone material is similar to Fe208-SOL, and this both extends till 20kHz, but the FE0280-SOL is much heavier than both, almost 9kg! per driver, meanwhile the FE208EZ extends only till 14kHz, it's heavier than FE206EN and half of the weight of the FE208-SOL.
FE208EZ and FE208-SOL are similar in price, FE208-SOL a little more expensive, meanwhile FE206EN is much cheaper than both.
What are the differences between this 3 drivers when analyzing the impedance curve? I noticed there's a big deep on the FE208SOL down to 20db, meanwhile the FE206EN and FE206EZ have a more similar impedance curves.
FE208SOL is a much better drivers on the bass frequencies department?
Appreciate the help from all, in order for me to understand better the most significant differences between this drivers.
I'm not so versed on deep technical language, still learning, so please, be patience, I'm doing my best to understand
You guys are being great! Already thanks everybody for the help.
Best Regards sirs.
Sigh. How many threads?
The FE206En is the standard production model. The FE208ESigma is the higher end model albeit with this unit Fostex restricted the HF BW to improve LF & midband performance. The FE208-SOL was a limited production model for the Japanese market combining (more or less) the 206 cone with the 208 basket and a dedicated motor + suspension.
If it isn't a foolish question, why do you give a rat's *** what the total weight of the driver is? This is not an indicator in itself of anything other than just that: the total weight of the driver.
Magnet weight tells you where a lot of the mass has gone; I assume that the SOL unit, like some previous limited edition Fostex models, has something like a cobalt-lathanun magnet rather than a basic ferrite. It has more motor power, hence weight. So much in fact that realistically speaking to use at its best in a back-loaded design you'd need an amplifier with a DF of < 1 (output impedance of 7ohms or higher into its nominal Re) or the equivalent amount of series resistance. As you can see from their own horn design, which isn't particularly stellar in terms of LF gain.
Impedance curves are measured in ohms, not decibels. You are looking at the wrong part of the scale. Ohms are given on a logarithmic scale on the right hand side of the graph.
Define 'better'. It's one of the most highly [over] damped drivers of its type and very much a specialist unit; strictly speaking this also applies to the 206 and 208ESigma, but to a lesser extent. With a poorly matched amplifier or no equivalent compensation, LF gain will be 'modest'.
The FE206En is the standard production model. The FE208ESigma is the higher end model albeit with this unit Fostex restricted the HF BW to improve LF & midband performance. The FE208-SOL was a limited production model for the Japanese market combining (more or less) the 206 cone with the 208 basket and a dedicated motor + suspension.
If it isn't a foolish question, why do you give a rat's *** what the total weight of the driver is? This is not an indicator in itself of anything other than just that: the total weight of the driver.
Magnet weight tells you where a lot of the mass has gone; I assume that the SOL unit, like some previous limited edition Fostex models, has something like a cobalt-lathanun magnet rather than a basic ferrite. It has more motor power, hence weight. So much in fact that realistically speaking to use at its best in a back-loaded design you'd need an amplifier with a DF of < 1 (output impedance of 7ohms or higher into its nominal Re) or the equivalent amount of series resistance. As you can see from their own horn design, which isn't particularly stellar in terms of LF gain.
Impedance curves are measured in ohms, not decibels. You are looking at the wrong part of the scale. Ohms are given on a logarithmic scale on the right hand side of the graph.
Define 'better'. It's one of the most highly [over] damped drivers of its type and very much a specialist unit; strictly speaking this also applies to the 206 and 208ESigma, but to a lesser extent. With a poorly matched amplifier or no equivalent compensation, LF gain will be 'modest'.
Thanks for the clarifications, meanwhile I still learning how to interpret the impedance curve graphic correctly, can you please explain the big difference and the implications on the sound reproduction, abou the FE208-SOL Vs. FE206EN and FE208EZ?
I noticed on the FE208SOL, there's a line that goes down till number 20 on the left column scale (that have a dB unit of measurement), meanwhile the other 2 drivers goes till the number 50 on this scale.
Many thanks.
What big differences?
The FE208ESigma as a limited HF BW and is designed to be used with a supertweeter, the FE206En and unavailable FE208-SOL (limited edition, all sold out AFAIK) are primarily meant to be used by themselves. Relative to the 206, the 208ESigma has a slightly more linear midband & lower HD from a superior motor.
They've used a different graph scale for frequency response. Simple as that. As noted, the impedance curve has nothing to do with the left hand scale. The impedance scale in ohms is shown on the right hand side of the graph; and you will note that from 10Hz - 20KHz it is very similar for all three drive units.
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Nothing whatsoever to do with impedance. It is simply a different graph scale for frequency response (which is not impedance. I repeat: it is not impedance). To save space, Foxtex provide both frequency response and impedance on the same graph. The horizontal scale is frequency in Hz. The left hand scale for frequency response gives sound pressure level in dB. The right hand scale for impedance is in ohms. Simple as that.
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Sorry, I used term the impedance curve graphic wrongly, referring the term for the graphic as whole...
I knew that the scale in the left side there's nothing to do with impedance, just was trying to know what this scale in dB measures is about...
Don't know if I already understood... It's the driver's frequency response, presented in dB measurement instead of hertz?
Thanks.
I knew that the scale in the left side there's nothing to do with impedance, just was trying to know what this scale in dB measures is about...
Don't know if I already understood... It's the driver's frequency response, presented in dB measurement instead of hertz?
Thanks.
Frequency response, or more correctly a frequency / amplitude response graph shows the output behaviour of a drive unit over its operating range. The range is expressed in Hz (horizontal scale), and the output level in dB (left hand vertical scale). As you can see, it varies with frequency.
As I've mentioned before, the difference is they decided to use a different graph scale.
As I've mentioned before, the difference is they decided to use a different graph scale.
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