Most powerful long throw sub?

[Ferrit37]

Hey Guys,
In keeping with the Martin-Audio tradition try this : Professional Loudspeaker Systems. Martin Audio Ltd.

[Patrick Bateman]

Originally Posted by Inductor

I only know Wayne's sub (2x12"). I don't know if it can compete in the same race. He and Danley are two best designers.
Bass Horn subwoofer
AudioRoundTable.com: Pi Speakers => Pi 12 sub plns please?

Here's Wayne's measurement of his sub. This measurement is at 10 meters; add twenty dB to compare it to 1M measurements. This is with 2400 watts.



Here's my sims of the McCauley M421 and TH-Mini. Note that this is a *sim*, and the mini is getting more watts than it can physically handle.


Some observations:

1) th-mini is crazy sensitive considering it's footprint. I can see why Danley moved away from front loaded horns. Even if the output per cubic foot was identical, the tapped horns are much much easier to manufacture
2) Wayne's sub detonated during testing, with 2400 watts.
3) The McCauley sub goes lower than both, but WOW is that a big heavy expensive box. (The drivers alone cost $3400 versus about $203 for a TH-Mini and about $330 for the Pi sub)

One thing that's a bit of a mystery to me is why the rolloff of the tapped horn is shallower than the sims would predict; sims say 24dB per octave but Jeff Knorr's measurements are showing about 12dB per octave. Odd.

[Original Burnedfingers]

I had to show this...the mother of all subwoofers





THE BIGGEST HORN SUB OF THE WORLD by Roberto Delle Curti ITALY

[NEO Dan]

Originally Posted by Original Burnedfingers

I had to show this...the mother of all subwoofers





THE BIGGEST HORN SUB OF THE WORLD by Roberto Delle Curti ITALY

Wow, I haven't seen this posted....



this week

[Phil B]

I`d say for "long throw " ( whatever that is !) then a block of 8 Terrahorns has always impressed me by how damn far the sub travels!

The Terrahorn

.p.

[epa]

if you want long throw,just make a endfire aray.
patrick,i'm intrested in the hr inputs of the mcauley ,if you have them?

[weltersys]

Originally Posted by Patrick Bateman

3) The McCauley sub goes lower than both, but WOW is that a big heavy expensive box. (The drivers alone cost $3400 versus about $203 for a TH-Mini and about $330 for the Pi sub)

One thing that's a bit of a mystery to me is why the rolloff of the tapped horn is shallower than the sims would predict; sims say 24dB per octave but Jeff Knorr's measurements are showing about 12dB per octave. Odd.

The M421 drops off at about 36 dB per octave below Fb.
The lack of coherency (red line) indicates the bump at 16 Hz is from some outside noise, probably wind or a passing truck.

Art