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Old 5th February 2005, 08:03 PM   #1
Juspur is offline Juspur  Denmark
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Default My fostex fe126e experiences

Hi diy'ers

Click the image to open in full size.

I just wanted to report, that I've built the fostex-recommended basreflex-design for the fe126e. The background for this report is the general lack of information for fe126e-designs.

Before I started, I wondered whether I needed a parallel notch filter to dampen the 6,5 kHz peak - but decided to give it a listen first.

I've no previous experience with full-range driver, but was afraid that it could be nasale and with too much energy is the upper frequencies.

To put it short, I had absolutely nothing to worry about: the sound is very balanced, delicate - and with an extreme musical timing and natural amount of details - you definitely won't get bleeding ears - I just kept listening to cd's all night long (and today too). The tonality is musicality is absolutely setting a very high standard.

The only backdraw is off course the limited bass, but I don't feel I'm missing anything, according to the timing and quick response overall.

My cd/amp/cable setup is very neutral, and in the $6000-league. I've scrapped my other speakers (at $1400/pair).

The fe126e-design is at $200/pair, including enclosures.
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Old 5th February 2005, 09:33 PM   #2
johnb is offline johnb  Sweden
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Nice work, that MDF is it used for bracing?
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Old 5th February 2005, 09:42 PM   #3
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Wow. Bested some high dollar ones and scrapped em, eh?

Can I have em? Just kidding. Good for you.

I wonder if anyone participating in the 127E "reference TL" thread has any comparative experience. Have you looked thru that thread? MarkMc might have some info for you.

Thanks for posting.
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Old 6th February 2005, 08:32 AM   #4
Juspur is offline Juspur  Denmark
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Quote:
Originally posted by johnb
Nice work, that MDF is it used for bracing?
Well, I bought some cheap bookcases - the MDF was necessary for the sides of the enclosures (the one side is glued on the original back of the bookcase, the other is glued on a frame just inside the enclosure.
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Old 6th February 2005, 08:32 AM   #5
Juspur is offline Juspur  Denmark
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Onassis: thank's for the hint - I'll check that (long) thread once again.

Regards,
Juspur
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Old 6th February 2005, 09:30 AM   #6
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Quote:
Originally posted by Juspur
I bought some cheap bookcases
creative cabinetry -- i love it... they look quite sharp :^)

dave
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Old 6th February 2005, 08:58 PM   #7
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I love it! That proves you don't have to have a full-blown workshop to successfully DIY.
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Old 6th February 2005, 09:39 PM   #8
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That proves you don't have to have a full-blown workshop to successfully DIY.
you just need to think different

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Old 8th February 2005, 10:52 PM   #9
Illusus is offline Illusus  Canada
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Looks fantastic. Congratulations.

True DIY'ers see potential in everything.
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Old 12th February 2005, 08:51 PM   #10
Juspur is offline Juspur  Denmark
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Well, it's not exactly a boom box. Fostex recommends a 11,5 cm long port (Ø 5 cm). I played around with boxplot - see below:

Click the image to open in full size.

Well, -3 dB at 200 Hz, -5 db at 150 hz, flat until 61 Hz, rolloff. It must be possible to come up with something better.

Click the image to open in full size.

This is better. Port length = 4,3 cm, -3dB at 150 and 80 Hz, with rise to 0 db at 90 Hz. I still don't like the -3 dB at 150 Hz, so here we go again:

Click the image to open in full size.

Port length = 3,2 cm, -3 dB at 80 Hz.

...And the sound? Well, the last solution is absolutely the best - you can feel the bass in the floor + a very coherent sound. Try it!
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