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JBL W12GTI mkii: Bottoming out?
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<blockquote data-quote="mc71" data-source="post: 8456188" data-attributes="member: 664923"><p>I have 3 w12gti's &amp; 1 of them, at higher volumes, will hit a bass note &amp; make this popping sound. I listen to EDM &amp; at a certain point, like after a buildup &amp; the bass comes back in, the kick drums will become this distorted "bok" "bok" "bok" (call me for exact pronunciation) sound.</p><p></p><p>Or sometimes it happens on a sudden higher-pitch bassline note...if the bass is generally low freqs.</p><p></p><p>While my first assumption is it's bottoming out....it's a gti mkii! (known to be able to take tons of power &amp; has the DDD "brake"ing system built in, etc).</p><p></p><p>I should mention, it was bought used &amp; I've noticed the voice coil terminals can be twist-tightened to the point they'll keep twisting (like the bolt on top could be tighter). It's not loose, but still...could be tighter....&amp; yet that top bolt isn't easy to get to.</p><p></p><p>With these 3 w12gti's (each in JBL spec 2.25cu ft, 1" MDF, triple baffle, aero-ported at 30hz) I'm still not playing the volume I've previously gotten with just 2 10" Alpine type-R's in a Crutchfield prefab box.</p><p></p><p>Currently I have my amps' SSF's set at 23Hz...initially I had 30hz RCA SSF's plugged in-line.</p><p></p><p>Is it possible the bass notes could be loosening my wire connections &amp; causing this distortion?? Because it's odd that sometimes it happens on a high-bass note, odd that it still happens with 30hz SSF's, &amp; odd that it's happening on a w12gti (with way more power than my 10" Alpine, yet not as much actual volume).</p><p></p><p>The box I have these subs in is heavy as hell &amp; snuggly fits in my SUV...it's not easy to get the subs in &amp; out of the car. So I'm just wondering anyone's gut reaction.</p><p></p><p>Any thoughts??</p></blockquote><p></p>
[QUOTE="mc71, post: 8456188, member: 664923"] I have 3 w12gti's & 1 of them, at higher volumes, will hit a bass note & make this popping sound. I listen to EDM & at a certain point, like after a buildup & the bass comes back in, the kick drums will become this distorted "bok" "bok" "bok" (call me for exact pronunciation) sound. Or sometimes it happens on a sudden higher-pitch bassline note...if the bass is generally low freqs. While my first assumption is it's bottoming out....it's a gti mkii! (known to be able to take tons of power & has the DDD "brake"ing system built in, etc). I should mention, it was bought used & I've noticed the voice coil terminals can be twist-tightened to the point they'll keep twisting (like the bolt on top could be tighter). It's not loose, but still...could be tighter....& yet that top bolt isn't easy to get to. With these 3 w12gti's (each in JBL spec 2.25cu ft, 1" MDF, triple baffle, aero-ported at 30hz) I'm still not playing the volume I've previously gotten with just 2 10" Alpine type-R's in a Crutchfield prefab box. Currently I have my amps' SSF's set at 23Hz...initially I had 30hz RCA SSF's plugged in-line. Is it possible the bass notes could be loosening my wire connections & causing this distortion?? Because it's odd that sometimes it happens on a high-bass note, odd that it still happens with 30hz SSF's, & odd that it's happening on a w12gti (with way more power than my 10" Alpine, yet not as much actual volume). The box I have these subs in is heavy as hell & snuggly fits in my SUV...it's not easy to get the subs in & out of the car. So I'm just wondering anyone's gut reaction. Any thoughts?? [/QUOTE]
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JBL W12GTI mkii: Bottoming out?
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