Randomly came across this right now (Answer on HZ tuning)

[Germ305 10+ year member]

What hertz should my subwoofer box be tuned to i? - Yahoo! Answers

Isn't it Tune lower for more SQ and higher for SPL?

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[dragnix 5,000+ posts]

that seems to be the general rule of thumb, yes. It appears the person who answered it didn't know what he was talking about. I could be wrong though...

 

[SourDeez 10+ year member]

Isn't it Tune lower for more SQ and higher for SPL?

I personally don't believe this is a valid argument (i've had boxes tuned to 30hz vs 40hz)

I have had some 45hz boxes that sounded great.. and some 32hz boxes that sounded like farts (same driver in the boxes)

 

[Imtjnotu 5,000+ posts]

The person who answered that is a ****** idiot flat out....he has no clue what he is speaking about

 

[shizzzon 10+ year member]

SQ is subjective and doesn't fit everyone's opinion.

SPL is measurable and not every vehicle peaks high.

We have some vehicles in my area currently peaking at 39hz and 28hz.

Now, the 28hz, we are 99% sure it's tuning error but the 39hz is correct after years of tuning.

Cool thing is the truck that is peaking at 28hz is winning still, hehe, so that's always a plus.