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<blockquote data-quote="gltyrian" data-source="post: 198320" data-attributes="member: 543315">okay.. so i just installed my new avionixx 800.2 (800 x 1 at 4 ohm) sub to the elemental designs 12a.22... this was an &#039;upgrade&#039; to a ppi pc2400 (400x1) powering 2 JL 12w3&#039;s...i kinda phased my upgrade in 2 steps.. new box/sub first..powered by the pc2400.. which sounded fine.. hit a little harder than the 2 w3&#039;s.. not too much harder, but certainly tighter.. then i finally got a chance to switch out the amps today/rewire to 4 guage.. but yet..the sub still hits the same.. maybe a little worse!&nbsp; the main thing that stood out to me was how after upping the bass to a certain level (about 3/4)..the sub makes this really rattling noise.. its bass + this nasty vibration noise.. not from the trunk, but from the sub itself.. &#039;flab flab flab&#039; sorta thing..i was reading some guide sayin&#039; that if my bass goes &#039;flat,&#039; and my headlights dim... it means i need a capacitor to give my sub an extra umpphh.. but then im not really sure what they mean by &#039;flat&#039;?&nbsp; is that my experience?i was also thinkin if it could be caused by a bad box maybe? some leaks on the sealed enclosure?it seems like a lotta ppls got this avionixx/e12a setup..&nbsp; so it snot really &#039;hardware incompatibility&#039;... any ideas?? heeeeellp!! :-/</blockquote>

[QUOTE="gltyrian, post: 198320, member: 543315"] okay.. so i just installed my new avionixx 800.2 (800 x 1 at 4 ohm) sub to the elemental designs 12a.22... this was an 'upgrade' to a ppi pc2400 (400x1) powering 2 JL 12w3's... i kinda phased my upgrade in 2 steps.. new box/sub first..powered by the pc2400.. which sounded fine.. hit a little harder than the 2 w3's.. not too much harder, but certainly tighter.. then i finally got a chance to switch out the amps today/rewire to 4 guage.. but yet..the sub still hits the same.. maybe a little worse! the main thing that stood out to me was how after upping the bass to a certain level (about 3/4).. the sub makes this really rattling noise.. its bass + this nasty vibration noise.. not from the trunk, but from the sub itself.. 'flab flab flab' sorta thing.. i was reading some guide sayin' that if my bass goes 'flat,' and my headlights dim... it means i need a capacitor to give my sub an extra umpphh.. but then im not really sure what they mean by 'flat'? is that my experience? i was also thinkin if it could be caused by a bad box maybe? some leaks on the sealed enclosure? it seems like a lotta ppls got this avionixx/e12a setup.. so it snot really 'hardware incompatibility'... any ideas?? heeeeellp!! :-/ [/QUOTE]

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