Fostex FE206NV and ML-TL

Fostex FE206NV project is finished.
Some ML-TL derived from a Martin King project for Lowther that with some modifications fit into the TS parameters of the Fostex, these being very similar to those of the Lowther Dx2.
http://www.quarter-wave.com/Project04/Project04.html

To equalize this extended range I decided on two notch filters centered at 2.6k and 9k and a step speaker that starts at 150 hrz.
It has a rise of about 5 dB above 10k, very suitable for those of us who have lost sensitivity in those highs.
The impedance was very friendly for the tube amplifier with which this system will be used.

Note: Hornresp was used for the design and simulation of the box. Jeff Bagby's spreadsheet and XSim were used to design and simulate the filters. For response measurements the REW and for impedance the LIMP. All software free to use. It was measured with a Dayton IMM6 calibrated microphone.
Sorry for my english
 

Attachments

  • fffffffffff.jpg
    fffffffffff.jpg
    156.9 KB · Views: 170
  • bbbbbbbb.jpg
    bbbbbbbb.jpg
    122.3 KB · Views: 148
  • Captura de pantalla 2024-06-06 194901.png
    Captura de pantalla 2024-06-06 194901.png
    48.2 KB · Views: 184
  • IMG_20240606_140022.jpg
    IMG_20240606_140022.jpg
    299.2 KB · Views: 189
  • FB_IMG_1717714958184__01__01.jpg
    FB_IMG_1717714958184__01__01.jpg
    35.7 KB · Views: 191
  • Like
Reactions: wchang
Nice work,

I also have 2 FE206NV2 sitting in their boxes and would like to build some good enclosure for them - preferably double front loaded horn like Sachiko or Kirishima.
I wonder if somebody will re-make Sachiko / Kirishima drawings for newer Fostex FE206NV2 line - these cabinets were not updated for a very long time and eN drivers are anyway obsolete by now?
 

Attachments

  • IMG_4116.JPG
    IMG_4116.JPG
    372 KB · Views: 39
  • IMG_4119.JPG
    IMG_4119.JPG
    409.4 KB · Views: 39
@Ramey

Nice work! I’m interested in building Martin’s ML TL as well since I recently picked up a pair of DX4 drivers for a steal.

They needed some work, but I think I have them sorted now well enough to try them out.

It’s good to know that Martin’s design is adaptable to Fostex drivers. I have a pair of the NV that came in some Kirishima horns I scored in the past couple years.

IMG_5313.jpeg
I decided to try modifying my older 206e drivers and I’m loving them in those cabinets. So much so that I’ve put off trying some used 206esr and 208ez I hoarded after I got the cabinets.

@tubemax

I would reach out to Dave at Planet 10 or scottmoose on hear. There might already be an adaptation of the Sachiko/Kirishima design…or perhaps the NV2 isn’t different enough to warrant changes and it could be used in one if the existing cabinets. Either way, they’re the guys to talk to.
 
  • Like
Reactions: Arthur Jackson