Tweed combo build

Is it important for the speaker baffle and back panels to be made of birch ply? Would fir plywood work in place of birch?

I would not notice any difference.

Give it enough time and someone will claim that birch ply has some secret mojo that no other ply has.
If the baffle board is secured to the cabinet adequately, I can't imagine any difference between birch or fir or any other type of plywood.

Beavers prefer birch.

In these parts Beaver prefer Aspen, probably cause its plentiful:wink:

Actually I have pine ply and birch in 2 different cabs and can't say my ears can tell the difference, both sound good to me.:cool:

Birch is defintely heavier, stiffer and more expensive, and MIGHT sound a bit brighter... but I think the difference would be less than what you'd hear from 2 different coupling caps in the circuit that are within tolerance.

Birch makes a bigger difference when you're using JBL, EVM, or other really heavy speakers-it's stronger, and will support more weight than pine or fir will, given the same thickness. But if you're using your typical Jensen or Weber Alnico speakers, by all means use the pine-not only is it cheaper, but it's (usually) more "vintage-correct" or whatever that means...

Franc Robert

Thx for the replies. I'll continue on with the cheap stuff.

I am going to think that 'void free' is more important that what wood is used....especially in the baffleboard.

Thx for the replies. I'll continue on with the cheap stuff.

I think that's the right approach.

I am going to think that 'void free' is more important that what wood is used....especially in the baffleboard.

What does "void free" mean?

Wally is absolutely right about this. A void is an empty space. In lower grade plywood, you have holes in the individual plies due to knots that create voids in the finished product. In the higher grades of plywood, these holes are plugged to make the final product more uniform - and stronger.

Wally is absolutely right about this. A void is an empty space. In lower grade plywood, you have holes in the individual plies due to knots that create voids in the finished product. In the higher grades of plywood, these holes are plugged to make the final product more uniform - and stronger.

Thx.

No love for pine?

No love for pine?

Every thing is pine but the baffle and back panels