Wayne Parham Messages: 18835 Registered: January 2001
Illuminati (33rd Degree)
I purchased some AE TD12S midwoofers to try in my three π design, and am using the Smith & Larson tester to check them out. The three π speaker currently uses an Eminence Delta 12LF, and if this woofer works out, it will provide an upgrade option for that speaker.
I just did the electro-mechanical tests, and am now doing an in-box impedance sweep to make a ZMA file for the ICD. Then I'll use the ICD to look at the on-axis and off-axis response. If the woofer is smooth through the midrange (as I expect), then I'll make sure the crossover sets the forward lobe and vertical nulls where they should be, and if not, make changes accordingly.
Sure is nice to be able to have a tool like this. No more spending days trying to calculate phase and distances to estimate the position of the nulls, only to measure after the fact. WTPro makes it easy!
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