RE SX12 ported box size in your opinion?

sound giant
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im in the process of getting one RE SX12 D4 gonna be powered with a hifonics bxi2006d amp. So if i wire to 2ohm load then i get about 1200watts with that amp. Im wondering what size box i should build. The RE site optimal says 2.0 cu @ 32hz....should i go bigger with this power, maybe 2.5 cu @ 32hz? Im not sure, what is a really good size and tuning for this combo? I want to keep it sounding nice but i have room in the trunk so if going bigger will be better then ill up the size of the box.

 
it will handle more power in the larger box correct? sorry its been awhile since ive been into car audio.

go with the bigger box mine liked it better mine went from 1.6 to 2.25 and it was way different
what did you tune it to? Did it just get alot louder in the bigger box?

 
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