It is confusing, probably what you would call particle board, like this Particle board - Wikipedia it comes in various densities though, some has smaller particles and is very hard
As our Welsh friend alludes, PB goes by numerous names, and like MDF it does range in quality.
We're currently working on a large volume commercial project for paneling and closet / office cabinets for a high-end condo project. The bulk of the project is in a fumed Eucalyptus veneer, sheets are 7ft x 8ft, and produced in Ecuador. Pretty enough face veneers - if rather dark - but the substrate is the worst non veneer core crap we've ever seen in the shop - smaller particles than OSB flakeboard, but the internal integrity is horrible once any machining made for dadoes, etc. Let's assume close to the standard 45lbs /ft^3 - a 3/4" sheet will weigh just under 160lbs, and those are architectural grade face veneers, so handling onto the beam saw and CNC, then several further production and finishing steps is "interesting"
We're currently working on a large volume commercial project for paneling and closet / office cabinets for a high-end condo project. The bulk of the project is in a fumed Eucalyptus veneer, sheets are 7ft x 8ft, and produced in Ecuador. Pretty enough face veneers - if rather dark - but the substrate is the worst non veneer core crap we've ever seen in the shop - smaller particles than OSB flakeboard, but the internal integrity is horrible once any machining made for dadoes, etc. Let's assume close to the standard 45lbs /ft^3 - a 3/4" sheet will weigh just under 160lbs, and those are architectural grade face veneers, so handling onto the beam saw and CNC, then several further production and finishing steps is "interesting"
Do you guys break-in your drivers before instalation? I've got a frequency generator and plenty of amps, thinking about doing some break-in during my holding pattern. If you do break them in, what percentage of RMS power? How long? Do you fluctuate frequency, or just run at resonant frequency? Any point in tweeter break-in?
Thank You.
Thank You.
Despite some saying you should hit them hard, they should be played at low levels with varying source. I use a radio station and put at least 200 hrs on drivers before i start really breaking them in with real-world use.
An artifical signal can give the spider in particular a “bad memory”.
dave
An artifical signal can give the spider in particular a “bad memory”.
dave
Thanks Dave. I'm just going install and listen, keep the power moderate for a while. That's what I've always done with new purchased speakers anyway.
Yes, various qualities of sheet goods available.
I don't purchase sheets from HD or Lowe's anymore.
Uniboard and Columbia Forest Products are two good names for MDF and Particle.
For a wall-to-wall TV cabinet, I used 3/4" Ultracore. Its a softwood plywood with thin layer of MDF on both surfaces. Plywood is light, stable, strong and hold screws really well. Surfaces are excellent for painting.
I don't purchase sheets from HD or Lowe's anymore.
Uniboard and Columbia Forest Products are two good names for MDF and Particle.
For a wall-to-wall TV cabinet, I used 3/4" Ultracore. Its a softwood plywood with thin layer of MDF on both surfaces. Plywood is light, stable, strong and hold screws really well. Surfaces are excellent for painting.
+1 to the Ultracore / Procore types of products - although they're not as widely available through big-box chain stores - you'll need to check around for suppliers to the commercial trades
I've used biscuits and a biscuit joiner to make perfect, strong butt joints in MDF. Easy to get right with a little practice.
Wood products from Canada is like coffee and cigars from the Dominican Republic!
The key to the laminated products is to get both sides treated the same, don’t do that and the risk of warping is way higher.
My speakers are in therapy to help them with their bad memories...
The key to the laminated products is to get both sides treated the same, don’t do that and the risk of warping is way higher.
My speakers are in therapy to help them with their bad memories...
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