Making a test box (1 Viewer)

[Mark gas]

I am making a box for 6.5 inch drivers that will be adjustable so I can change the air space inside the box. What’s the maximum air space a 6.5 inch driver will need? 1 cubic feet enough or should I go 2 cubic feet?

 

[GrahamT]

The Vb depends on the driver and the desired Q. In general, 1 cu ft is plenty for a 6.5" driver but more info is needed. Why do you need to vary the Vb?

 

[Mark gas]

I want to try out a buch of driver that I have and see what box size suits them the best.

 

[Greg Monfort]

If you know its Vas, then 4*Vas is 'close enough' to a sealed IB, i.e. Qtc = ~Qts, whatever it is. If not, then just doing a quick search, the highest Vas I found for a 6.5" is 1.14ft^3, so I guess you can't go wrong with ~4.56ft^3.

GM

 

[GrahamT]

You can model the in box response in winISD and other programs if you have the TS parameters.

 

[Mark gas]

yes but once I do I have to build a box for them. This way i can use winisd for box size throw the driver in the test box with a tweet and use a active xover and give a listen and then try another driver within minutes. 4 cubes might be a little to big for space wise so i might go for 2 cubes.

 

[Wayne A. Pflughaupt]

No need to make the wall movable. You could build the box the biggest size you think you would ever need it, then cut several 1/4 cu. ft. styrofoam blocks. All you would have to do is drop enough blocks inside the box to reduce the airspace by the amount you want.

Regards,
Wayne A. Pflughaupt

 

[Mark gas]

thanx for the tip