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Enclosure Design & Construction
Twin Sundown SA6.5 SW D2 32Hz Ported 0.6ft3 in Ford Escape Box Build
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<blockquote data-quote="shredder2" data-source="post: 8643761" data-attributes="member: 674047"><p>IDK... really after lookin' at both tunes, I feel the 40ish tune will sound better IMO. BTW I just overwrit my X6.5 parameters in the database earlier but the tune looks basically the same at 32hz. Too much loss of output and that's a bad tradeoff with small cone area IMO. Here's the database fixed so you can see it's a Sa-6.5D2 and it still is basically the same IMO. 38hz is as low as I'd personally go as the 45hzish punch will kinda be diminishing already tuning from 40hz to 38hz.</p><p></p><p>Green is 32hz and Yellow is a 40hz tune.</p><p></p><p><img src="https://snag.gy/MwizNY.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>I might be proven wrong yet but that's what I'd go with.</p><p></p><p>OP.. you said you saw frequency response curves in the Sundown parameters above that peaked at high 30's and low 50's... all I saw was impedance and phase in degrees annotated on that graph.</p><p></p><p>Modeling the subs is probably better than just using a box calc and manufacturer recommendations IMO.</p><p></p><p>If it was me and I had the width I'd do a single 3.5" round 23" long... that's 41.03hz in a .6ft3 net enclosure. You'd gain efficiency and punch right where you need it with the small cone area. I don't know if you have the space or desire to tune a touch higher (using a round) but the 32hz tune looked like a dog to me.</p></blockquote><p></p>
[QUOTE="shredder2, post: 8643761, member: 674047"] IDK... really after lookin' at both tunes, I feel the 40ish tune will sound better IMO. BTW I just overwrit my X6.5 parameters in the database earlier but the tune looks basically the same at 32hz. Too much loss of output and that's a bad tradeoff with small cone area IMO. Here's the database fixed so you can see it's a Sa-6.5D2 and it still is basically the same IMO. 38hz is as low as I'd personally go as the 45hzish punch will kinda be diminishing already tuning from 40hz to 38hz. Green is 32hz and Yellow is a 40hz tune. [IMG]https://snag.gy/MwizNY.jpg[/IMG] I might be proven wrong yet but that's what I'd go with. OP.. you said you saw frequency response curves in the Sundown parameters above that peaked at high 30's and low 50's... all I saw was impedance and phase in degrees annotated on that graph. Modeling the subs is probably better than just using a box calc and manufacturer recommendations IMO. If it was me and I had the width I'd do a single 3.5" round 23" long... that's 41.03hz in a .6ft3 net enclosure. You'd gain efficiency and punch right where you need it with the small cone area. I don't know if you have the space or desire to tune a touch higher (using a round) but the 32hz tune looked like a dog to me. [/QUOTE]
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Twin Sundown SA6.5 SW D2 32Hz Ported 0.6ft3 in Ford Escape Box Build
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