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Frugel-Horn Mk3 Builds & Build Questions
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Old 24th November 2020, 07:27 PM   #1481
planet10 is offline planet10  Canada
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Frugel-Horn Mk3 Builds & Build Questions
Python just ate another snake?

dave
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Old 24th November 2020, 10:52 PM   #1482
Scottmoose is offline Scottmoose  United Kingdom
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It would appear so.

I've no idea what this drivel is, but purely for my own amusement I intend to make something similar with bell wire + copious amounts of BAF wadding, and take it to the next show I attend.
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Old 29th November 2020, 07:59 AM   #1483
Roo2 is offline Roo2  Australia
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Another pair of FH3ís come to life. Alpair 7MS. 18mm birch ply. 30g stuffing in point and 20g under driver. They sound great to me. Time to play with placement.. Thanks!
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Old 29th November 2020, 10:08 AM   #1484
zman01 is offline zman01  Bangladesh
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Roo2,

Congratulations, nice build!
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Old 3rd December 2020, 01:16 AM   #1485
alsyd is offline alsyd  Australia
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What's the current advice on a adding a bevel to the inside of the driver cutout?

I'm using the Alpair 7MS.
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Old 3rd December 2020, 03:28 AM   #1486
chrisb is offline chrisb  Canada
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Whether a bevel or quarter round radius, Iíd consider it mandatory in any enclosure design incorporating full range drivers. A whole lot easier to accomplish before assembly.
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Old 3rd December 2020, 03:43 AM   #1487
alsyd is offline alsyd  Australia
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Quote:
Originally Posted by chrisb View Post
Whether a bevel or quarter round radius, I’d consider it mandatory in any enclosure design incorporating full range drivers. A whole lot easier to accomplish before assembly.
Nice, thank you.

The drivers arrived yesterday and I'm hoping to source the timber tomorrow so I can get started this weekend!

I've been having trouble determining from photos whether the driver should be slightly sunken in to the baffle or mounted on top - I suppose the primary resulting factor here would be the distance from cone to rear of the cabinet (albiet small). If it's on top I'm considering using a thin (~3mm) facing material for a nice face finish.

The other topic I'm looking for guidance on is the cabinet stuffing as it's not easy to source in Australia. Is it really any different (or different at all) from polyester filling material for cushions, etc.? ei Excel Fibre Hobby Fill
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Old 3rd December 2020, 04:30 AM   #1488
chrisb is offline chrisb  Canada
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While during my active building days I personally got a bit too anal about rebating all FR drivers for flush mounting, including Fostex FE / FF series with thin stamped metal basket frames, itís probably a bit OC to insist in applying that to any make / model with a thin and tapered profile external flange such as these. But considering the very shallow overall depth and profile of cone, and the efforts extended to reduce restriction of airflow around the mounting legs and motor assembly, chamfering or radiusing the the rear side of driver opening - particularly with baffle material any thicker than letís say 12mm (1/2Ē) - should be considered mandatory.
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Old 10th December 2020, 11:58 PM   #1489
GregBinCT is offline GregBinCT  United States
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I’m about to start a frugel-horn build Using the Fostex FE126nv - but have a quick amp question. A KT88 SET amp just became available to me at a great price. The thing puts out about 60wpc. I was intending to use my existing 3.5w TubeCube 7 with these speakers as I’m already using it to drive some BiB speakers I’ve built. Is the 60w too much horse power for these frugel/Fostex speakers?
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Old 11th December 2020, 01:10 AM   #1490
vinylkid58 is offline vinylkid58  Canada
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Quote:
Originally Posted by GregBinCT View Post
A KT88 SET amp just became available to me at a great price. The thing puts out about 60wpc.
Sounds like a push-pull amp to me, not single ended.

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Is the 60w too much horse power for these frugal/Fostex speakers?
Well, definitely too much for the little FE126.

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