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FREE SUB PLAN: Dual Lab12 (Front Loaded) by Welter Systems
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<blockquote data-quote="Art Welter" data-source="post: 17246" data-attributes="member: 52"><p>Re: FREE SUB PLAN: Dual Lab12 (Front Loaded) by Welter Systems</p><p></p><p>Noticed a few mistakes on the Lab 2x 12+ design sheet, the design program evidently does not allow a few things we do in the real world.</p><p> </p><p>Seth Hochberg did those sheets for me, I don't have the software to correct them, but here are the mistakes:</p><p> </p><p>The internal dimension is 20 inches deep. The speakers are front mounted on the baffle, which is set back one inch from the cabinet front.</p><p> </p><p>The more detailed plans show the correct dimensions.</p><p> </p><p>This rough drawing may help some with the port detail:</p><p> </p><p><img src="http://www.soundforums.net/attachment.php?attachmentid=360&d=0" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>I'd recommend recessing the speaker in the baffle to provide more grill clearance for those users that use amps rated more than about 1100 watts. </p><p> </p><p>I'm using Crest CA 9 power amps, rated at 900 watts at 4 ohm, 1000 at 2 ohms for the 2 x12s. When the clip lights flash pretty bright, the cones just start moving the grill. With those amps, with stiff AC power, a pair of cones are probably getting close to 1500 watts peak, which pushes the cones right around their Xmax of 13mm.</p><p> </p><p>The Lab 12 cones are pretty tough, but I wouldn't recommend more than about 1600 ''real'' watts, unless using a peak limiter capable of limiting below 30 Hz and the 45 -50 Hz range.</p><p> </p><p>The Lab 12s are so clean that it would be easy to tear them up with too much power, they just won't give much audible sign of distress before they smoke or tear.</p><p> </p><p>Art Welter</p></blockquote><p></p>
[QUOTE="Art Welter, post: 17246, member: 52"] Re: FREE SUB PLAN: Dual Lab12 (Front Loaded) by Welter Systems Noticed a few mistakes on the Lab 2x 12+ design sheet, the design program evidently does not allow a few things we do in the real world. Seth Hochberg did those sheets for me, I don't have the software to correct them, but here are the mistakes: The internal dimension is 20 inches deep. The speakers are front mounted on the baffle, which is set back one inch from the cabinet front. The more detailed plans show the correct dimensions. This rough drawing may help some with the port detail: [IMG]http://www.soundforums.net/attachment.php?attachmentid=360&d=0[/IMG] I'd recommend recessing the speaker in the baffle to provide more grill clearance for those users that use amps rated more than about 1100 watts. I'm using Crest CA 9 power amps, rated at 900 watts at 4 ohm, 1000 at 2 ohms for the 2 x12s. When the clip lights flash pretty bright, the cones just start moving the grill. With those amps, with stiff AC power, a pair of cones are probably getting close to 1500 watts peak, which pushes the cones right around their Xmax of 13mm. The Lab 12 cones are pretty tough, but I wouldn't recommend more than about 1600 ''real'' watts, unless using a peak limiter capable of limiting below 30 Hz and the 45 -50 Hz range. The Lab 12s are so clean that it would be easy to tear them up with too much power, they just won't give much audible sign of distress before they smoke or tear. Art Welter [/QUOTE]
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