Dayton 18" HO Ported Build Thread

[1Randy]

To calculate the volume of a cone, use the formula: volume = (1/3) × π × r² × h, where r is the radius of the base and h is the height of the cone. Simply plug in the values for r and h to find the volume.

You'll need to subrtact the small volume where the voice coil attaches for total accuracy, but it's negligible.

Volume Displacement = Sd x Xmax

Example:

So (1) ultimax 18" = more than (3) RSS315HF

 

[highfigh]

Volume Displacement = Sd x Xmax

Example:

So (1) ultimax 18" = more than (3) RSS315HF

Ever try to model an enclosure without a full set of Theil-Small parameters? If Sd isn't included, you'll need to calculate the area and I posted a tool that can be used by anyone, not just you.

 

[1Randy]

Ok, im just trying to figure out bass impact in a home theater, if you're using smaller drivers, how many do you need to equal bigger driver.

 

[Verdinut]

If the diameter is equal between the two, the deeper cone will displace more air but I never claimed a deeper cone will move more air, I provided the formula in order to show how to calculate the displacement. It's the diameter AND excursion that determine the air movement.

I have to disagree with you on that. I have Vance Dickason's Loudspeaker Design Cookbook 7th edition, and other books by Alden and Weems, and nowhere is a mention relating to a driver cone volume as a factor for air displacement.