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-   -   :-( my (fe126en) FrugalHorn mk3 boxes sound wore than small boxes (https://www.diyaudio.com/forums/full-range/283637-fe126en-frugalhorn-mk3-boxes-sound-wore-boxes.html)

Ensoniq 10th December 2015 03:53 AM

:-( my (fe126en) FrugalHorn mk3 boxes sound wore than small boxes
 
Finished building Frugal Horn mk3 toda for fostex fe126en drivers.

Prior to this FH mk3 I just had fe126en's in simple boxes with dimensions of Adam p11a studio monitors.

The simple (p11a clone boxes) speakers sounded slightly better than FH mk3, even the bass!

The FH mk3 has so much midrange and much less highs and lows...

Is that how FH mk3 with fe126eb supposed to sound ? And so many people like it ?

planet10 10th December 2015 04:54 AM

Must be some issue with the FH3… the FE126En optimum BR size is about 4 litre, the Adam will essentially be an IB. Bass will have a smooth roll-off below 200-250 Hz.

Stuffing? Leaks?

dave

Ensoniq 10th December 2015 12:23 PM

I stuffed it with pink house insulation. And yes I might have tiny leaks here and there.
If I deal them with smtn like acoustic sealant will that Improve the enclosure ?

perceval 10th December 2015 01:00 PM

It should. Leaks kill bass.

Bigun 10th December 2015 02:51 PM

have the drivers had time to break-in ? My experience with Fostex drives was that there was a noticeable improvement after 1 hour and they loosened up over time.

That was some years ago and I was using them in a 6 litre Onken enclosure - even after break-in the FE127 drivers had little bass to speak of and the treble was irritating so I sold them. I'm not saying your drivers are bad too but it may be a 'family' sound that Fostex has and it may be that like mysefl, you will prefer a different brand.

vinylkid58 10th December 2015 03:32 PM

Quote:

Originally Posted by Bigun (https://www.diyaudio.com/forums/full-range/283637-fe126en-frugalhorn-mk3-boxes-sound-wore-boxes-post4543713.html#post4543713)
That was some years ago and I was using them in a 6 litre Onken enclosure - even after break-in the FE127 drivers had little bass to speak of and the treble was irritating so I sold them. I'm not saying your drivers are bad too but it may be a 'family' sound that Fostex has and it may be that like mysefl, you will prefer a different brand.

6 litres is too small. I went out to 14.5L with my Onkens. They had lots of bass with the FE127's.

jeff

Ensoniq 10th December 2015 04:40 PM

I played them much more than 1 hour in the old (p11a size) enclosures

vinylkid58 10th December 2015 04:42 PM

Did you stuff the whole line below the driver?

jeff

planet10 10th December 2015 05:35 PM

Quote:

Originally Posted by Ensoniq (https://www.diyaudio.com/forums/full-range/283637-fe126en-frugalhorn-mk3-boxes-sound-wore-boxes-post4543577.html#post4543577)
I stuffed it with pink house insulation.

Do you have picture or can descibe the amounts… yours ar ethe 1st i've run across that use fiberglass as damping. The FH3 is fairly sensitive to damping.

dave

Bob Brines 10th December 2015 08:42 PM

I've had a bit of experience with fiberglass, and I would never stuff a pipe with fiberglass. I line my MLTL's with 15-24mm of acoustic fiberglass, and that pretty much takes care of the pipe modes. a bit of polyfill if the midrange is a bit strong. But never stuff with fiberglass. Fiberglass works something like an octave below polyfill and if you use the same amount of fiberglass as you would with polyfill, there will be no bass. Now if you are working with a subwoofer box that you are trying to make go isothermal, then that's another story.

I was going to add an anecdote about leaks but got distracted. I built a cabinet with a rabbeted woofer. Did it freehand with a router, so the surface of the rabbet wasn't perfectly smooth and as I was in a rush, I didn't use a gasket under the driver. That small amount of leakage under the driver frame completely destroyed the tuning and alignment of the cabinet.

Bob


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