FR125 in octaeder - diyAudio
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Old 25th May 2008, 08:08 PM   #1
Henkjan is offline Henkjan  Netherlands
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Default FR125 in octaeder

I built a small (4 liter) ocateder shaped pair of loudspeakers with the FR125 for my daughter (11 years old).

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The cabinets are aperiodically damped, I used a small BR pipe and filled it tight with BAF.

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After first listning I decided that a notch filter would improve the sound
R=4.7ohm, L=0.56mH, C=22uF resulted in a nice flat response.

Click the image to open in full size.

and the sound: wel simply very good! the high end is excelent for a 4" FR, but bundling is a lot more that e.g. a 3" Tangband. the low end, despite having a f3 of ~100Hz, is still tjhat of a larger box.

all in all I am rather pleased with the result (although the paint job could have been better)
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Old 25th May 2008, 09:40 PM   #2
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Nice speakers! How they sound?
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Old 26th May 2008, 12:30 AM   #3
adason is offline adason  United States
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Quote:
How they sound?

Quote:
and the sound: wel simply very good! the high end is excelent for a 4" FR, but bundling is a lot more that e.g. a 3" Tangband. the low end, despite having a f3 of ~100Hz, is still tjhat of a larger box.
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Old 26th May 2008, 03:29 AM   #4
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Lovely build... i love it when something other than a rectangular box shows up (i know i'm guilty of that)...

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Old 26th May 2008, 09:54 AM   #5
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Great artistry.
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Old 26th May 2008, 10:54 PM   #6
Henkjan is offline Henkjan  Netherlands
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Thanks for the compliments.

best of both worlds, this shape is both artistic and techy

I wonder when my daughter starts getting tired of her dad continiously coming in and playing CDs on her set yes, I am very pleased about the result, and so is Sofia. here´s one happy father
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Old 27th May 2008, 03:32 PM   #7
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Quote:
Originally posted by adason



As you can imagine, I've read the previous thread. When I asked how they sounded, I wanted to know if they sounded boomy, tight, how the bass was? See, I wanted a detailed analysis.

"Simply good" is not enough.
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Old 27th May 2008, 04:52 PM   #8
adason is offline adason  United States
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See, I wanted a detailed analysis.
than you have to built them yourself and hear for yourself
even detailed analysis is somebody else's opinion
individual opinions vary
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Old 27th May 2008, 05:42 PM   #9
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Quote:
Originally posted by adason
thaen you have to built them yourself and hear for yourself
even detailed analysis is somebody else's opinion
individual opinions vary
We still want to hear what he has to say...

dave
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Old 27th May 2008, 06:14 PM   #10
Henkjan is offline Henkjan  Netherlands
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Quote:
Originally posted by adason
than you have to built them yourself and hear for yourself
even detailed analysis is somebody else's opinion
individual opinions vary
and besides that, I'm not very good in highendish but I'll give it a try then

bass is "just right", absolutely not boomy, but certainly present (as in not absent). of course the lowest octave is not there, and big drums are softer than usual.

high is nicely detailed without any sharpness. off axis it gets softer, bundling is of course an issue with this size FR

tonal balance is (with the notch filter) excelent, instruments and voices sound very natural.

and the soundstage, well it's a fullranger, it does what you expect it to do... only the best multiway speakers can come close to this.
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