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Hy Wayne .recently get a eminence 10 inch woofer model valtec 1510 that modeled in WinIsd and model identical to the Alpha 10A . Comparing the Qts , Vas,Xmax ,Qes ,are the same .The good news is that this new driver is indeed cheap I got mine here in Mexico in $ 14.50 usd against the alpha 10A several times its price .Do you know this model Wayne I certainly would like to model this woofer with your program but I have problems with zip encoded programs beside that I am a newbie regarding to speaker modeling software .Her are the Thiele-Small parameters =Fs 60 hz =(Re) 5.32 =(Qts) 6.0 =(Qes) 0.63 =(Qms) 12.83 =(Vas) 55.7 Lts = (Bl) 8.5 T-M =(Xmax) 3.5 mm = (EBP) 96 = (Xmech) 7 mm =(Pwr) 80 Wrms ..Thanks
Great price for those speakers! PiAlign suggests 1.1ft3 tuned to 40Hz, which is in between the size of the one π and two π cabinets. Your speaker will work very nicely in boxes from 1.0ft3 to 5.0ft3 (28L - 140L) tuned to 40Hz - 45Hz. Basically, it will work in either the two π or two π tower with a port change to raise the Helmholtz frequency.
Hy .Wayne thanks for your answer when you say a port change to raise the Helmholtz frequency the port need to get smaller .thanks
That's right. Smaller diameter, shorter length or both. Helmholtz Formula</ul(.*)
Hi, I am not sure about accuracy, but here it is a site that looked pretty to me (in English and Metric units). Helmholtz Resonance Calculator
That's a handy link, thanks. It looks like the forumulas are slightly different, but they calculate similarly. Notice the length offset on one formula is (L + 0.8d) and the other is (L + 8/3πd). 8/3π = 0.85, so the formula are very similar. One uses 0.8d for length offset and the other uses 0.85d.