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Oh...Sweet...Jesus..... (LARGE comp. content)
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<blockquote data-quote="GordonW" data-source="post: 2269426" data-attributes="member: 568981"><p>Would having 8" woofers with 9mm Xmax in the doors, put you in the Big Midbass Club? //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif</p><p></p><p>I'm not kidding... the 8" woofers in my doors, have 7/8" inch LONG voice coil windings. With a 1/4" thick pole piece, that's 5/8" total overhang, or about 16mm. Divide by two and multiply by 1.15 (which is the standard definition of Xmax as specified by ALMA, the American Loudspeaker Manufacturing Association, calculating from geometry), and you get 9.1mm...</p><p></p><p>The fun thing? It's a readily-available woofer from a '70s-to-early-'80s Genesis Physics home speaker, that works GREAT in IB in a car door. They made thousands of them... I've got a stash of about 22 extra woofers, that I've gotten and fixed/rebuilt. Don't think I'll be running out of spares anytime soon, even if I build a 9-woofer-per-side home line array speaker out of 18 of them, like I've been casually "planning" for several years...</p><p></p><p>Amazing how much output they can put out, from 22w/ch (Proton 222) on them... they're flat from 25-400 Hz. No subs, THEY are the ONLY woofers needed!</p><p></p><p>Regards,</p><p></p><p>Gordon.</p></blockquote><p></p>
[QUOTE="GordonW, post: 2269426, member: 568981"] Would having 8" woofers with 9mm Xmax in the doors, put you in the Big Midbass Club? [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] I'm not kidding... the 8" woofers in my doors, have 7/8" inch LONG voice coil windings. With a 1/4" thick pole piece, that's 5/8" total overhang, or about 16mm. Divide by two and multiply by 1.15 (which is the standard definition of Xmax as specified by ALMA, the American Loudspeaker Manufacturing Association, calculating from geometry), and you get 9.1mm... The fun thing? It's a readily-available woofer from a '70s-to-early-'80s Genesis Physics home speaker, that works GREAT in IB in a car door. They made thousands of them... I've got a stash of about 22 extra woofers, that I've gotten and fixed/rebuilt. Don't think I'll be running out of spares anytime soon, even if I build a 9-woofer-per-side home line array speaker out of 18 of them, like I've been casually "planning" for several years... Amazing how much output they can put out, from 22w/ch (Proton 222) on them... they're flat from 25-400 Hz. No subs, THEY are the ONLY woofers needed! Regards, Gordon. [/QUOTE]
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