Hertz Hx380D

I"m no box guru or mad genius or anything..but if I remember right they liked sealed enclosures a bit more then ported and sealed was 1.75-2.25 and ported was 2.75-3.25 tuned around 30-32hz...but that is just from memory...Let me get some sleep and I will double check tomorrow on those specs.

Just seen RAM's post...he is more then likely right(from what I remember anyway)

 
Looks like Hertz gives recommended box specs right on that link for small sealed, sealed optimal, small ported, optimal ported... Of course vehicle response will make slight difference as well.

 
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