OSB for construction

[weltersys]

Other than OSB, I have a lot of 18mm spruce plywood around (built a house extension out of it). By and large void free, but only 7 plys including faces. Any good? Moves around a fair bit more than birch ply if left unconstrained (e.g. drawer face) but fine once built into a cabinet (or house, for that matter).

Not as stiff (or heavy..) as 13 ply baltic birch, but 18mm 7 ply spruce plywood should be ~7% stiffer than OSB, and weigh less.
Given the choice, I'd choose the spruce ply over OSB or MDF even if it cost more.
Since you have it, use it!

Art

 

[MtlJazz]

What about Laminated Veneer Lumber LVL. Say for an open baffle design, this is pretty inert and mighty solid. Any downside besides pricing.

A tad overkill? 😳

 

[Tenson]

If you want to use what you already have, then yes OSB can work, basically anything can work to build a box. As mentioned you will need to fill or seal the surface well. I'd probably rub a load of wood filter in to it, diluted with PVA and a little water to make it more workable and bond well.

Need to also be careful of joins since there can be tear-out and voids on the cuts.

Lots of work to make a good speaker from a scrap material.

 

[Bazukaz]

Hi,

The laminated lumber, AKA plywood is tough and durable material. Some say void-free is necessary, but from personal experience I would say that normally voids, if there are any, are small and do not cause a problem. Can be finished using wood dye and varnish resulting in good looks.
In case of OSB it's surface is rough, so directly gluing thin veneer may be not an option. However thin plywood like 3-4mm can be glued over top and is neither particularly difficult or expensive to do while result can be excellent.

Regards

 

[Guerilla]

@TubaV