[sdiy] bass pedals? How low is too low?

[metasonix]

>The lowest note of Bass Guitar is 40Hz... organ pedals (the super long pipe
>organ style ... 32') can go to 20Hz.
>Almost no speaker can reproduce 20Hz reliably. 

I agree. Most of the high-ticket powered subwoofers on the market
barely do 35 Hz. In no other area have I seen so much spec inflation.

>those bllsh!t "bandpass boxes" do not count in my book, unless you are
>willing to build one for each note.  The extreme "Q" of these systems makes
>them suitable for shaking nearby buildings from a car

Which appears to be their only real-world application.
It's a billion-dollar market too.

"Hahahaha! Stupid Americans want car to boom!!
We sell them junk woofers with high Q in sealed box!!"

>Folded horn designs like the Klipshorn (sp?) that use the room walls as the
>final 'mouth' of the horn might do well also...

A Klipschorn isn't practical in most clubs or other venues. Rarely do you
find a clear, square corner suitable for it. I have seen people back them
with corners made of 8x8 plywood sheets, with questionable results.

Community Sound makes a horn with an 90-inch by 90-inch mouth
and a flare frequency of 34 Hz....it only weighs 750 lb...

What to tell this guy? He needs to shop for subwoofers, and take his
bass pedals with him.