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Enclosure Design & Construction
12 years since my last box, before I start cutting figured I'd get a sanity check on this design. 2x Ev3 12s in 2x 1.76cf chambers ~32hz
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<blockquote data-quote="ExtremeODD" data-source="post: 8758571" data-attributes="member: 564981"><p>After running these for just over a week, I've gotta admit that they don't hit near as low as the 12s I grew up with. Maybe I was spoiled with a single eclipse tc9 12in with 25mm xmax, then dual okur k9 12s with the same 25mm xmax, where at full tilt a cloud of smoke would shift side to side over an inch during a low note. </p><p></p><p>I've seen where people have been able to do mutant looking port extensions to lower the box tuning but I've gotta wonder if it would be a waste of time considering the fairly small amount of cubes the box has. I'm also toying with the idea of cutting out the internal chambers to combine them and running a pair of tube vents but again I'm not even sure the ev3 12s could even benefit from that. Winisd hasn't shown me numbers that look too promising in that regard. Or maybe it's just my voltage is dropping a touch too much and when I finish wiring the PWM controller to the DR44G alternator to allow for more than a measly 13.Xv output they may wake up some more. It's hard to say how much power the amp is truly pulling as my hardwired ammeter on the 1/0 input line has a fairly slow update rate and will only ever get past showing 50a on test tones.</p><p></p><p>I suppose before doing anything drastic I should finish up the PWM alt mod and slap on big 3 using the 4g wire I got for nearly free from the junkyard (cobalt rear battery cable, wish I would have known about the 300 rear batt using 2g) before jumping the gun.</p></blockquote><p></p>
[QUOTE="ExtremeODD, post: 8758571, member: 564981"] After running these for just over a week, I've gotta admit that they don't hit near as low as the 12s I grew up with. Maybe I was spoiled with a single eclipse tc9 12in with 25mm xmax, then dual okur k9 12s with the same 25mm xmax, where at full tilt a cloud of smoke would shift side to side over an inch during a low note. I've seen where people have been able to do mutant looking port extensions to lower the box tuning but I've gotta wonder if it would be a waste of time considering the fairly small amount of cubes the box has. I'm also toying with the idea of cutting out the internal chambers to combine them and running a pair of tube vents but again I'm not even sure the ev3 12s could even benefit from that. Winisd hasn't shown me numbers that look too promising in that regard. Or maybe it's just my voltage is dropping a touch too much and when I finish wiring the PWM controller to the DR44G alternator to allow for more than a measly 13.Xv output they may wake up some more. It's hard to say how much power the amp is truly pulling as my hardwired ammeter on the 1/0 input line has a fairly slow update rate and will only ever get past showing 50a on test tones. I suppose before doing anything drastic I should finish up the PWM alt mod and slap on big 3 using the 4g wire I got for nearly free from the junkyard (cobalt rear battery cable, wish I would have known about the 300 rear batt using 2g) before jumping the gun. [/QUOTE]
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Car Audio Help
Enclosure Design & Construction
12 years since my last box, before I start cutting figured I'd get a sanity check on this design. 2x Ev3 12s in 2x 1.76cf chambers ~32hz
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