Fostex F120A vs FX120 or Alternatives - diyAudio
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Old 20th May 2004, 07:32 AM   #1
Dr. ODD is offline Dr. ODD  Germany
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Default Fostex F120A vs FX120 or Alternatives

HI All
I am planing to build a Projekt with a widerange Unit plus Bass. I dont want to use bigger Chassies because of dispersion. I tried the FE108 Sigma and the FE127 but there is still a bit of "paper Sound" and distorsion which I dont like. Does anybody has listening Experience whith the F120A or FX120 ( they are on my "worth a try" List ) or has anybody other Favorits for this use.


Bernhard
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Old 22nd May 2004, 07:13 AM   #2
Dr. ODD is offline Dr. ODD  Germany
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OK

Does anybody know somebody who knows these Chassies?
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Old 22nd May 2004, 08:25 AM   #3
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Smile FR sugestion

Hi Bernhard May I sugest the Jordan JX92S FR speaker with sub ?
I couldnt be happier with mine
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Old 28th May 2004, 08:39 PM   #4
Dr. ODD is offline Dr. ODD  Germany
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Thank you THOR
I fear a littel that te Jordans have a very low bass whithout electric crossover? it cold cost me SPL max ??
What kind of musik are you listen whith it ?
Bernhard
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Old 29th May 2004, 05:15 AM   #5
navin is offline navin  India
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i have been investigating such a combination for a while. the reasons are:

1. I believe every exrta component detract something
2. keep design very simple using only 1st order XO

my design calls for a 7-8" woofer capable of delivering 95db at 2m with a 8-10W amp mated to a wide range unit from 300Hz up capable of the same (95db at 2m with 8-10W).

the amps in intend to use are solid state for bass and tube (el84) for widerange. the Xo will 1st order PLL-XO (passive line level).

actually the jx92 i hear needs a super tweeter so i would suggest the jx53.

from the fostex range i would suggest a FF85k.

the jordan jx53 costs about $120 the FF85K cost about $30.

each of these can then be XOed over to a 7-8" woofer. in the case of jordan the JX125 or JX150. in the case of fostex though I am a bit stumped.

I have looked at the FW208N as one alternate but it costs $160 and it has a very low Qts (0.2) which makes it unsuitable for TL or ML-TL. I am hence stuck looking for a good 7-8" woofer that can work in a 20-22liter box and produce 45hz (-3db). While I have an approximate budget of $70 for the woofer I can strech it if the "right" woofer is found.

my goal is for a TL bass and a open baffle fullrange. also i am hoping my design is flexible enough to incorporate a second fullrange in a vertical array with the 1st if more SPL is required. I know this will lead to comb filtering but this can me compensated by tilting the box a bit backwards.
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Old 1st June 2004, 11:03 PM   #6
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Default Re: Fostex F120A vs FX120 or Alternatives

Quote:
Originally posted by Dr. ODD
HI All
I am planing to build a Projekt with a widerange Unit plus Bass. I dont want to use bigger Chassies because of dispersion. I tried the FE108 Sigma and the FE127 but there is still a bit of "paper Sound" and distorsion which I dont like. Does anybody has listening Experience whith the F120A or FX120 ( they are on my "worth a try" List ) or has anybody other Favorits for this use.


Bernhard
Before you throw away the Fostex speakers, try painting them with some varnish.
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Old 2nd June 2004, 05:25 AM   #7
navin is offline navin  India
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have u considered the ff85k
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Old 3rd June 2004, 07:46 PM   #8
Dr. ODD is offline Dr. ODD  Germany
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Hi Thank you
Dave I dont want to throw them away. At the moment I just Punished them being a surround Speaker
Narwin I think the FF85 k is to small for the Speaker I am thinking of.

Bernhard
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Old 3rd June 2004, 07:54 PM   #9
joensd is offline joensd  Germany
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Not that I have listened to those...
but what about the Visaton B200?
Quite a recommended chassis and at the moment Visaton is planning "tours in germany" where you can borrow the "Solo50" for a while to have a listen to them at home.

As I´m still heavily playing with my Tangbands and am a bit short of time I still haven´t finished my ML-TL with the Gradient W160AL8.
That driver only costs 24€ was featured in HobbyHifi and Klang+Ton and at least one forum member build a speaker with it which he really likes.

http://www.spectrumaudio.de/
I wouldn´t buy it there but you can have a look at quite a few fullrangers including the Gradient.
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Old 4th June 2004, 06:32 AM   #10
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Quote:
Originally posted by joensd
what about the Visaton B200?
Excellent, very excellent. High Q, big Vas, means BIG box (or big baffle). Some claim a rising HF... the set i have don't exhibit any such issue.

dave
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