Birch vs. MDF test (spl results inside)

[SPL140.2 5,000+ posts]

Resin will probably not make much of a difference.

resin made the impendance rise when I did my tests. Birch was louder in my tests as well but I was using more power than what the OP was using

egg

 

[audioarsonal 10+ year member]

Nice can't wait to hear about the sanded port.

 

[Gary S 10+ year member]

I'm not surprised by this test... in theory, people like to use MDF because it should be quieter... but in reality, it's not audible.

I'd like to see a test of a box braced vs. unbraced, and/or different thicknesses of wood.

As long as the box does not balloon while playing, you won't loose SPL. Braces or dowels are a good idea.

 

[PSturmer 10+ year member]

you should try single baffle with dowel bracing VS double baffle with no bracing (ie, is it a better idea to double baffle, or just use a single baffle with dowel braces. i have heard people claim single baffle with dowels is more effective than just using a straight double baffle.)
thats, if you didnt brace in the last test lol

well my box is going to be so small there will be no room for bracing. but some physics says this. if you have a side L with thickness R it will flex less if you half the distance of L, so .5L and R, versus if you double R, so L and 2R. meaning it is better to brace with a threaded rod than to double layer the wood. how much stronger the rod will be than double layering will change with every box, but on paper it is very significant.

 

[PSturmer 10+ year member]

resin made the impendance rise when I did my tests. Birch was louder in my tests as well but I was using more power than what the OP was using
egg

well if it makes the independence rise then it should be quieter. when i do this test i will clamp the amps. as box's get larger and larger i could see how birch will be louder.

i am going to start resining a box today so maybe friday i will get it on the meter.

 

[Lakota 5,000+ posts]

What about testing wire through the port vs. wire through the box?//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[PSturmer 10+ year member]

What about testing wire through the port vs. wire through the box?//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

lol, sadly i did that test:crazy:

 

[audioarsonal 10+ year member]

What were the results from the 45 degree corners?

 

[Lakota 5,000+ posts]

What were the results from the 45 degree corners?

Corners are a hit or miss deal. Sometimes they help and sometimes they hurt.

 

[PSturmer 10+ year member]

What were the results from the 45 degree corners?

its kinda box to box. sometimes they will help sometimes they wont. the port has my air flow and the box has more air pressure. so in ports, i would always recommend putting corners in or even doing this:

but it takes some math to get the correct distances for the corner pieces so the width of the port never changes.

 

[mdillon 10+ year member]

is there anyway to test the SQ of these two materials?

percussion companies are very picky with wood. their stance is some resinate more than others. the most used are hickory, birch, and maple.

 

[bonesninja 5,000+ posts]

ok and how is the type R after 1800 watts more then it was rated for?

try 2300 watts more...type r's are 500 watts rms

 

[Lakota 5,000+ posts]

We need more threads like these instead of "will my type r's be louder than my buddy's audiobahn flames?"

 

[IgnoreMe 5,000+ posts]

We need more threads like these instead of "will my type r's be louder than my buddy's audiobahn flames?"

true, but im also sure that there would be more threads like this if everyone had access to a TL.

 

[PSturmer 10+ year member]

is there anyway to test the SQ of these two materials?
percussion companies are very picky with wood. their stance is some resinate more than others. the most used are hickory, birch, and maple.

sq is still by ear. i guess i could test the freq responce of each would. but i only trying to get my car loud