What would I need to do to increase the tune?

[benner410 10+ year member]

Box is 2.5ft^3 net tuned to 33hz with 40.5 in^2 of port.

15"h x 34"w x 16"d outer dimensions.

I heard about adding blocks in the corners of the box to increase tuning... What would I do to make it 38hz? Cutting is not an option, box is already built.

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[FurbiesAndBeans 10+ year member]

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maybe seal it and run aero ports? idk if thats a good idea though.

 

[99grandprixGT 5,000+ posts]

either make the port wall longer or shorter i don't know which one though.

 

[ARSkemp 10+ year member]

shorter wall = higher tuning

 

[adam212 10+ year member]

definately shrink the port depth

or adding blocks inside anything to decrease the volume of the box will raise the tuning

 

[ARSkemp 10+ year member]

Adding about ~ .6ft^3 worth of blocks should raise the tuning around the 38hz range, but then your box is now ~1.9ft^3 net instead of 2.5.

 

[Immacomputer 10+ year member]

Making the enclosure smaller is the best option to raise the tuning frequency.

If your enclosure looks something like this on the inside, you can add the 45* angle pieces with these dimensions to bring the enclosure to about 1.9 cubic feet and it will tune it to around 38hz.

 

[mlstrass 5,000+ posts]

have you tried the box yet the way it is?

Otherwise I agree on taking up volume as the box is already on the large side.

 

[mcsoul 10+ year member]

What speaker(s) is this box for?

 

[benner410 10+ year member]

What speaker(s) is this box for?

HDC312

 

[mcsoul 10+ year member]

1 or 2 HDC312's?

 

[benner410 10+ year member]

1 or 2 HDC312's?

1, and to m1strass: i haven't tried the box yet, but I may like it, who knows? I was just told for the music I listen to (mainly bass-heavy rap) that 38hz would be the best, and 33hz would sound like utter crap.

 

[mcsoul 10+ year member]

I think you may need to sell this box and go for 2.5 at 40hz or 42hz.

I guess it would be impossible to use a dremel and try to remove some

of port piece B (I've never tried that).

 

[Immacomputer 10+ year member]

Let your ears decide, don't go by what people think you will like and not like. And don't buy into the bullshit that AQ subs have to be tuned to 40hz.

 

[mazdakid 5,000+ posts]

just make the port a little shorter. will make the volume of the box go up just a little though.