how this design looks ( PI )
have anyone made one of those ?
eh, I doubt they couple as well as the simulation says.
And the corner loading, that better be 3 walls of concrete also.
Bass will blast right through walls otherwise (lose another 3db or more below 100hz).
Take the kf940.
It is a double 12" bass horn made by EAW.
32" x 36" x 52" at 300lbs each.
It has a 13' long mouth with maybe 6ft2 mouth area.
Notice it couples well at 200hz, but hardly at all at 25hz.
This is off of THEIR spec sheets, not someone else's tests.
But you can add eq (see their literature).
And 4 dual 12 bass horns can take 12db of boost at 30hz better than 1 dual 12" box.
I wouldn't ever build a sub-horn.
For the same area, you can get a bunch of 15's and add eq.
But I would build a bass horn on concrete floor (4-6ft2 mouth) and run it 100hz - 750hz if it could get up that high.
I like the tactile feel of bass.
I had a w-bin with 6-7ft2 of mouth.
I heard/felt no bass untill I was over 10' away.
And I was pounded listening down the hallway.
Pounded, not rumbled (not much below 100hz).
Bass horns are a different animal.
so that means the pi design is too bulky to be practicall
EAW is pricey and not in my league
I think so.
Bass horns (under 100hz) seem unpractical.
so i better stick to a TH sub design like the SS15
TH are nice, but limited bandwidth (in my opinion).
You have to cross them a bit b4 they get those 5-10db spikes.
But many love their sheer output.
I've never built or heard one, but they look interesting.
I'd require one or 2 15's, and that would be a BIG box.
It's up to you what you want (how low, how loud, how big, how expensive).
agreed with norman .
in the old days power was expencive and speakers had much les powerhandling and x-max.
nowadays power is cheap ,speakers have much more powerhandling and x-max.
if your gona use your sub to 100~125 hz for pa ,a th is great.
otherwise just bild br boxes(or ppsl)
I have 2 plan sets from Pi Audio, model 6 corner horn and model 8.
IF you read ALL the blurb about the Model 12, it says it's an Out Door device..... there was talk by Mr. Parham of horns to go atop the 12.
and to have small size for portability but maximize spl
yeah i know you cant break the laws of physics
from the top 3 i can choose 2 only
and the third will suffer
if i choose small size and high spl,,, it will be pricey
if i choose low price and small size, spl suffer
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