over and under dual 414's cabinet help

[Elitopus1]

I appreciate the links GM

So if I understand this correctly, there are 3 types of damping with a driver.

The first is the mechanical build of the driver itself. The surround, spider, and cone material all determine how hard or easy it is to move the driver. These things are not easily changed without reconing the driver.

The second is the driver in an enclosure. How much force is needed to move the driver in the enclosure. Which would include whether its acoustic suspension, ported etc. This would include the amount of damping material as well. I assume your click test is used to test the driver in the enclosure to see how over, under, or critically damped it is.

The 3rd is the the VC itself acting like an engine brake. Just as the VC and magnet move the cone, it is also used to stop the cone.

[GM]

You're welcome!

Actually 4 types, there's also damping the rear of the driver with a loosely attached felt 'blanket' or similar to act as a diaphragmatic absorber. Not aware of any available speaker design program that can sim this unless AkAbak can.

You can mod the spider to lower Fs, raise Vas and add viscous damping by injecting silicone in the VC gap to some drivers [not sure about Altec/GPA] and of course add weight to lower Fs, increase Qts.

Correct, though an impulse response is the best way to measure it. Note that at the extreme, ~aperiodic loading [~completely flattens the impedance peak] occurs at high damping densities, so to optimize it requires measuring impedance.

GM

[lokie]

uhhmmm... I have no idea what your talking about but thanks for your efforts.

Anyway... I'm not married to the 32B horns. I just happen to have an extras pair and a pair of 802's. And I love how they integrate with my current 15"ers.

I also have a pair of Emilar EH500's and pair of Altec 594A's. But no corresponding drivers for those horns, with the exception of one Altec 291B.

BTW... GM- I have talked to you about my room on the phone once a few years ago. I live up the road from you in Athens. Good memory.