In article , TonyL
wrote:
Arny Krueger wrote:

At some point, measuring T/S parameters starts looking good.


Better than building 3 boxes, certainly.

I don't know about the UK, but in the states you can get a USB gizmo
with software that does full relevant set of driver tests using your
PC for under $100.


OK, but that would be somewhat more than I paid for the drivers. I do
have an amp module that goes down to DC as well as other bits of audio
gear so I might have a go at T/S parameters to give me a ballpark
figure for the box volume.

Someone else will know the details rather better than myself. But I think
you can estimate some of the basic parameters for a large bass speaker from
some quite simple measurements.

e.g. By using a ruler to measure the displacement of the speaker cone when
you apply a fixed dc voltage. And - with the speaker pointing upwards - how
much displacement a small weight produces. (Rotating from vertical to
horizontal and measuring the displacement will also let you estimate the
mass of the cone, etc.) None of that may be very accurate, but may still be
close enough.

IIRC The "Loudspeaker Design Cookbook" by Vance Dickason explains this in
an appendix. But I may have actually read the details somewhere else. Not
really my topic.

Slainte,

Jim

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