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Old 15th September 2015, 02:23 PM   #131
jpak is offline jpak  United States
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Anyone have any favorite Youtube woodworking channels?
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Old 19th June 2018, 03:12 AM   #132
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by jpak View Post
Anyone have any favorite Youtube woodworking channels?
Search up John Heisz, an ex DIYAudi member too.
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Old 20th August 2018, 04:11 PM   #133
adrianbaugh is offline adrianbaugh  United Kingdom
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My view is that the "sparkle" and "life" is the job of the people producing the recording: the speaker should reproduce the recording as accurately as possible. I don't believe speaker colouration is a route to significantly improving a bad recording, but I do believe it can spoil a good one.


I know others feel differently, but given my perspective above, and given that for various reasons (cost, simplicity etc.) I'm probably committed to using 18mm plywood (with a double thickness for the baffle), is there a consensus as to whether it's better to use a ply with fewer thicker layers or many thinner ones? My local specialist timber merchant has good quality Malaysian ply and poorer quality Chinese ply, which they say tends to delaminate and is presumably for temporary use for formwork etc. I have no intention of using the Chinese stuff, however the Malaysian ply has only 5 layers (for a 18mm thickness), which is fewer than the Chinese stuff or the generic hardwood ply you can get in B&Q. Does that matter at all?
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Old 21st August 2018, 02:42 AM   #134
planet10 is offline planet10  Canada
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As a general rule the more plies the better. The shop grade 18mm we use has 13 plies, the higher quality stuff 15.

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Old 21st August 2018, 03:10 AM   #135
chrisb is offline chrisb
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The higher quality plywoods - even those with high ply count- are generally not imported from the Pacific side of of the continent, or from South American factories.
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Old 21st August 2018, 03:45 AM   #136
chrisb is offline chrisb
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Missed the editing time limit on above post - should have made clear that even the Oriental and South American imports with higher ply counts are vastly inferior to Euro sourced (Baltic and otherwise) plywoods. This is based on over 25 yrs in the commercial cabinet trade, and not something I read on the internet.
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Old 21st August 2018, 04:35 AM   #137
phase is offline phase  United States
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I remember a point in time where the Baltic 25 ply 18mm was being sold very reasonably here in the states, that didnít last though...
Was some 15 years ago, I remember the shop I worked at burning through it, one person managed to keep a sheet however.
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Old 1st November 2018, 07:12 PM   #138
ellisr63 is offline ellisr63  Mexico
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Originally Posted by castlesteve View Post
Your cabinet design i built for the FT1600s are the best cabinets i ever built with regard to sound. They don`t contribute to sound reproduction, they just let the drivers and network do their job. I now use your cement board approach in all the cabinets i build. Thanks Bob, Steve.
Steve, did you have to increase the cavity or add more stuffing to make up for the smaller cavity?
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Old 1st November 2018, 11:43 PM   #139
GM is offline GM  United States
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Quote:
Originally Posted by chrisb View Post
Missed the editing time limit on above post - should have made clear that even the Oriental and South American imports with higher ply counts are vastly inferior to Euro sourced (Baltic and otherwise) plywoods. This is based on over 25 yrs in the commercial cabinet trade, and not something I read on the internet.
Yeah, it's not just the number of plys, but the quality of them and the binder, pressure/temperature applied, so always look at its MOE spec, which for ~3/4" quality ply preferred for most speaker cabs to push the cab's summed Fs above the speaker's intended pass band will be > ~1.8m psi whereas the average 3/4" MDF is only ~527k psi, so must be much thicker to match [1.25" IIRC].

GM
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