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Lovin' this 4th order
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<blockquote data-quote="shredder2" data-source="post: 8640333" data-attributes="member: 674047"><p>I haven&#39;t used a 4th in 20 years, I just used a low tuned ported or higher tuned to meet SPl goals. [USER=615398]@THATpurpleKUSH[/USER] got me started lookin&#39; at 4ths and playin around. The Sa-15 I was gonna use modeled up nicely with an insane amount of gain where I wanted it. For a single 15 daily use it seems like it turned out even better than I wanted it to... IDK... The Synergy EFA3K powering the thing is at 2 ohm nominal and it&#39;s only got a group 75 lead-acid up front at this point but... IDK... windshield is bouncin&#39; nicely up top and I haven&#39;t even left the driveway... only about 4 min listening time so far but the peakyness is evident but it still goes fairly low, I gotta get a feel for her before I open her up with those low notes... anyways I&#39;m relocated and it&#39;s a quiet neighborhood and I really don&#39;t want to cause the neighbors to call the cops.</p><p>It&#39;s not done yet... amp is just layin&#39; there at this point... but I HAD to hear it. Sub got here this AM after I had to return the 1st one (wrong impedance) and I just got a new one this time instead of tryin&#39; to save a buck on an open box item... duh!</p><p>Gotta get me a secondary AGM now and finish her up... but this thing pounds!</p><p>Thanks Kush</p><p><img src="https://i.imgur.com/FilUbO4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/vuMCHaH.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/1ujQ0Hl.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/6RYcaGs.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/wRYNzvW.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/9ZxnkwU.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/Djxzu1P.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/Bk9rSQI.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/BpapfCr.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>:thumbsup:</p></blockquote><p></p>
[QUOTE="shredder2, post: 8640333, member: 674047"] I haven't used a 4th in 20 years, I just used a low tuned ported or higher tuned to meet SPl goals. [USER=615398]@THATpurpleKUSH[/USER] got me started lookin' at 4ths and playin around. The Sa-15 I was gonna use modeled up nicely with an insane amount of gain where I wanted it. For a single 15 daily use it seems like it turned out even better than I wanted it to... IDK... The Synergy EFA3K powering the thing is at 2 ohm nominal and it's only got a group 75 lead-acid up front at this point but... IDK... windshield is bouncin' nicely up top and I haven't even left the driveway... only about 4 min listening time so far but the peakyness is evident but it still goes fairly low, I gotta get a feel for her before I open her up with those low notes... anyways I'm relocated and it's a quiet neighborhood and I really don't want to cause the neighbors to call the cops. It's not done yet... amp is just layin' there at this point... but I HAD to hear it. Sub got here this AM after I had to return the 1st one (wrong impedance) and I just got a new one this time instead of tryin' to save a buck on an open box item... duh! Gotta get me a secondary AGM now and finish her up... but this thing pounds! Thanks Kush [IMG]https://i.imgur.com/FilUbO4.jpg[/IMG] [IMG]https://i.imgur.com/vuMCHaH.jpg[/IMG] [IMG]https://i.imgur.com/1ujQ0Hl.jpg[/IMG] [IMG]https://i.imgur.com/6RYcaGs.jpg[/IMG] [IMG]https://i.imgur.com/wRYNzvW.jpg[/IMG] [IMG]https://i.imgur.com/9ZxnkwU.jpg[/IMG] [IMG]https://i.imgur.com/Djxzu1P.jpg[/IMG] [IMG]https://i.imgur.com/Bk9rSQI.jpg[/IMG] [IMG]https://i.imgur.com/BpapfCr.jpg[/IMG] :thumbsup: [/QUOTE]
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