I guess knowledge was a poor term to use! Designing and tuning will not be a problem, just being in the car ICE industry ive not come accross folded horns ect, Its all been about quality and SPL rather than how far you can throw the sound!.
I need a set of subs that will throw lots of bass at the audience in a large/outside environment! HELP
The more SPL generated, the louder it is at distance.
SPL falls off at 6 dB per doubling of distance outdoors.
130 dB (about what one Keystone sub with 1500 watts can do at 35 Hz) at one meter will be 106 dB at 16 meters.
Josh Ricci's Gjallerhorn can do that at 25 Hz, but is over twice the size and uses an even more expensive driver.
Doubling drivers and cabinets driven at the same power level gets you another 6 dB.
If you want SPL of 130 dB at 16 meters, you need about 16 Keystones or 8 Gjallerhorns.
That said, a large array increases forward directivity quite a bit, you would still hear that array at around 94 dB at 2048 meters (1.26 miles) away in front of the stack.
Party on, dudes!
Art