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<blockquote data-quote="Jeffdachef" data-source="post: 8668543" data-attributes="member: 650438">I had the exact corolla. It has a really high vehicle peak frequency. If he likes rock and edm, he can just keep it like that with a moderately high tuned ported box 35-38hz.  if he like rap or anything with deep bass, he&#039;ll need to deaden his trunk because the car is flimsy as fk and has a hard time hitting lows naturally without acoustical treatments.  No blowthrough, there&#039;s too much air holes and pockets in the rear deck, your output will be sh*t and phase gets fked unless you do some fiberglass and seal off the rear deck completely off from the trunk.  Noticed literally zero output gains from the big 3 upgrade or alternator. The biggest gains in output I had was when i added batteries to the rear next to the amp, that was complete night and day difference in output.  I&#039;d go with a shok industries triton 12 d4, run it at 2 ohms then do two 12s later on when he doesnt need to give up as much room. Those were the loudest cheap subs I&#039;ve had on that car.</blockquote>

[QUOTE="Jeffdachef, post: 8668543, member: 650438"] I had the exact corolla. It has a really high vehicle peak frequency. If he likes rock and edm, he can just keep it like that with a moderately high tuned ported box 35-38hz. if he like rap or anything with deep bass, he'll need to deaden his trunk because the car is flimsy as fk and has a hard time hitting lows naturally without acoustical treatments. No blowthrough, there's too much air holes and pockets in the rear deck, your output will be sh*t and phase gets fked unless you do some fiberglass and seal off the rear deck completely off from the trunk. Noticed literally zero output gains from the big 3 upgrade or alternator. The biggest gains in output I had was when i added batteries to the rear next to the amp, that was complete night and day difference in output. I'd go with a shok industries triton 12 d4, run it at 2 ohms then do two 12s later on when he doesnt need to give up as much room. Those were the loudest cheap subs I've had on that car. [/QUOTE]

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