Fostex FE206NV and ML TL (Martin King)

Jump to Latest
R

Ramey

Member
Joined 2020
#1
Good morning:
I'm back with the box design for my Fostex FE206NV.
Generally, the same boxes are recommended for the Fostex FE206NV as for the Fostex FE206E.
There is a substantial difference between both speakers.
FE206EN has a Qts of 0.19. FE206NV has a Qts of 0.26 which makes them more suitable for Bass Reflex boxes.
For this reason I will opt for an MLTL.
I was studying a design by the GREAT Martin King for a Lowther model that he later used, just changing the tuning of the box, with Fostex FE206E and Fostex FE207E.

http://www.quarter-wave.com/Project04/Project04.html (Lowther)

http://www.quarter-wave.com/Project05/Project05.html (same box for Fostex FE206E and FE207e)

The Qts value of the Fostex FE207E is identical to FE206NV, they only differ in the Fs (39hrz vs 44hrz).

Could I use the same box design for my FE206NV, turning up the tune a little?

I have done the simulations with BASTA!

Unfortunately I don't know how to use Hornsteps, could someone do the simulations for me with said software?

Thanks from Argentina and sorry for my english.
Christian
 
Last edited:
#3
These are all horn drivers, so either tuned high for a high DF system or tuned low/Fs with some form of low DF system, so what do you plan to drive them with and if a high DF and wanting to tune low/Fs, then some form of series power resistance and/or some other form of EQ will be required, so what's your plan?
 
#4
planet10 said:
What about the rest of the numbers.

The FE206En is not well suited to an ML-TL. I have paid little attention to them, but i know that they are more suited to an MLTL but i would start from scratch.

dave
Click to expand...
.......... FE207E FE206NV
Fs. ... 39. ................. 44
Qts..... 0.26...................0.26
Qms.... 0.28...................0.27
Qes ... 3.86..................7.25
Vas.... . 56.2...................50.2
MMS.... 15.2................... 15.2

Thank you Dave
 
#5
GM said:
Todos estos son controladores de bocina, por lo que ya sea sintonizados en alto para un sistema de DF alto o sintonizados en bajos/F con algún tipo de sistema de DF bajo, entonces, ¿con qué planeas manejarlos y si tienes un DF alto y quieres sintonizar bajos/F? entonces se requerirá alguna forma de resistencia de potencia en serie y/o alguna otra forma de EQ, entonces, ¿cuál es su plan?
Click to expand...
Un amplificador Audinac, argentino de los años 60. Empujar y tirar EL84. Con tecla selectora para usarlo en modo pentodo o triodo.

IMG_20231009_175759.jpg
 
Last edited by a moderator:
#8
Ramey said:
the similarities of the FE206NV and the FE207E
Click to expand...

I knew, from talking with Scott, that the NV had moved the FE206x closer to the FE207e, but i did not realize it was that close.

I’ve asked Scott to check it in Dmetri. It will work in Vulcan and likely into Joan. An ML-TL close to what an FE207 fits into is very probably but, while not as finiky as a reflex, rea less tolerant than many horns.

dave
 
Last edited:
  • Like
Reactions: Ramey
#10
At this point, maybe better to do a T/S max flat and use a 25 ohm pot to dial in the necessary resistance to 'taste' in room and the amp's DF isn't sufficient, then either use tone controls and/or series resistance to make up the difference, ergo Vb = Vas, Fb = Fs, so all that's left is how high off the floor should the driver be?
 
  • Like
Reactions: Scottmoose
#11
Ramey said:
FE206EN has a Qts of 0.19. FE206NV has a Qts of 0.26 which makes them more suitable for Bass Reflex boxes.
Click to expand...
You could check with MJK on his Facebook site but I thought he has shown if a driver performs well in a bass reflex it should also in a TL. Try modelling it in any case in your favourite software to confirm. While the gui of hornresp is initially daunting, it doesn’t take that much persistence to do basic things. A lot of help is given on the hornresp thread but it’s a good idea to read the help file in the help menu for any obvious things.
 
Last edited:
  • Like
Reactions: Ramey
#13
woodo said:
Attempted to interpret MJK pdf for cross section and length and location of driver and port. Might be some differences as MJK got a flatter response. I get the attached for the NV--E was similar. Volume is fairly large, maybe smaller would be flatter.
View attachment 1224222
Click to expand...
Thank you very very very very very very much!!!! Yesterday I was working all day with the file you sent me and I finally learned how to use Hornresp. Eternally grateful.
Christian Peregrino
 
  • Like
Reactions: woodo
You must log in or register to reply here.
Top Bottom