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Old 28th December 2014, 07:17 PM   #471
mor2bz is offline mor2bz  United States
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ping Dave Planet 10 I tried to find your post in which you said that
you availability of some solid wood maybe spruce . but you said it was too soft .
could not tung oil be applied if one wanted to spend a month of sundays finishing them?

thanks
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Old 28th December 2014, 07:34 PM   #472
planet10 is offline planet10  Canada
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Frugel-Horn Mk3 flat-paks
Plywood is much stiffer & better damped than MDF. You would need 1" (25mm) MDF to (approx) equal that of 15mm quality ply. And then the MDF would stillnot be as well damped & that does not bring up MDFs issues of greater energy storage.

You can build Frugel-Horns out of MDF and they will sound OK, but it is not recommended and they will not sound as good as made from good plywood.

We use MDF for templates, spacers, bases, and some other ancillary uses, but we won't build speakers out of it.

dave
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Old 28th December 2014, 07:35 PM   #473
planet10 is offline planet10  Canada
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Quote:
Originally Posted by kevner1954 View Post
... and what happened to the plans for them?
Plans are still were they have always been...The Frugel-Horn

dave
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Old 29th December 2014, 06:18 PM   #474
chrisb is offline chrisb  Canada
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Some of my early speaker builds where with MDF - up to 1" in the case of a Churchill inspired enclosure for Tannoy 15" Dual Concentric, but my personal preference for plywood is based on comparing pairs of identical enclosures over a decade ago - bipole 2-way with CSS WR125 and dome tweeter (probably ERT126 or such?)

The most distinguished character of the thinner, lighter and stiffer plywood cabinets was "cleaner / faster" bass transients and more transparent vocals.


It doesn't hurt that plywood is rather lighter than M or HD fibreboard - when some larger designs entail almost a full sheet of material each, 45lbs foot^3 which is the average of local material, it can be literally back-breaking work to hoist a sheet onto a table saw, and carry finished cabinets up a flight of stairs.
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Old 13th January 2015, 10:45 PM   #475
mor2bz is offline mor2bz  United States
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ping Dave Planet 10 I tried to find your post in which you said that
you availability of some solid wood maybe spruce . but you said it was too soft .
could not tung oil be applied if one wanted to spend a month of sundays finishing them?

thanks

found it: #36
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We have explored estern Rred cedar flat-paks. Makes a very good speaker, is quite light-weight but we haven't figured out how to finish in a manner that makes it tuff.
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Old 13th January 2015, 11:00 PM   #476
mor2bz is offline mor2bz  United States
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Default Ping Dave Planet 10

You are in the west. How do you get your hands on Eastern Red Cedar?
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Old 13th January 2015, 11:12 PM   #477
planet10 is offline planet10  Canada
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Eastern Red Cedar?
Typo (i took Grade 11 Math instead of grade 10 typing, and my ancient laptop has baulky keys). Western Red Cedar.It grows in my back yard.

dave
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Old 8th February 2015, 08:09 PM   #478
baski is offline baski  United States
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Dave,
Are there any flat pak Kit in production now. Is there any ETA for the same?
Regards
..baski
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Old 8th February 2015, 11:03 PM   #479
planet10 is offline planet10  Canada
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Frugel-Horn Mk3 flat-paks
Flat-paks are more-or-less continuous production. We are usually behind in numbers & a short wait is more normal than not. Our biggest constraint in terms of timing is that we ar eat the bottom of the queue to access the CNC (a big Italian Morbedelli)

As of today i am just finishing packing up the last of a surplus we had and are waiting to get at the CNC for more.

Send me an email if interested.

dave
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Old 8th March 2015, 01:59 PM   #480
Toby Jug is offline Toby Jug  United Kingdom
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I have acess to Eucalyptus and Chestnut solid woods ,would these be sonicly better than Ply ???
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