"Realhorn" a rather unsual PA rig. Opinions?

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Ran across this PA system elsewhere, not on a forum about PA/SR.

To me it seems "unusual" in almost every regard.

Your opinions/thoughts?
Have at it! 😀

_-_-bear
 

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Anyone want to discuss the technical aspects of the thing?

For example:

This bass horn is like all speakers of REAL HORNS water cooled. The heat is extracted with a refrigerant compressor, the speakers can be cooled down to 5 degrees. The voice coil, inside the speaker, which is usually highly heated, thereby remain substantially cooler or cooled by a current pulse much faster. The coils have a lower resistance and the current can easily tiles by such a system. Since the electric current (amperes) times the voltage (volts) gives the performance, it is possible to double the sound pressure (power) to produce compared to non-cooled systems. In plain language, without cooling the double amount loudspeaker is required. Also an impressive transient response on time, by the any time possible high current flow is ensured.

and the claim of "146dB" max spl.

Also that they are using an array of bass bins along the front of the stage, when the F3 point is claimed to be "28Hz"?

Stuff like that...

_-_-
 
All that partially-correct mumbo jumbo seems to translate to "reduced power compression". I suppose if you put a heat exchanger inside the sealed chamber of an FLH and refrigerated the inside you would get just that. It would run cooler, the resistance wouldn't skyrocket as much, and there would be more SPL and more current draw from the amplifiers. You would need decent low compression drivers to begin with, and there would be limits to how cool you could keep it. For maximum benefit, the heat exchanger pipes would need to run through or around the magnet/pole piece assembly. Maybe they did this.

146 dB max is believable, at least for short term. A full stack of lab horns simulates at 147 dB at 80 volts. Power compression robs about 6dB off that but if that could be eliminated it would be possible. The bass bins in that system are bigger than a lab horn. And I'm sure they spent more money on their drivers. Probably liquid cooled like the rest of the system. Bins that size (in an array) do have f3's in the mid/high 20's. Excursion limits prevent full output down there - f3 and max useable low frequency limit don't have to be the same number. It may be only full undistorted output down to 30 or 32, with an "f3" of 28.
 
the site translated from German claims the big center horn has the F3 @ 28.
So, I found it odd that they would use a slew of "old school" folded horns along the front of the stage, since they are touting the incredible performance of the large center horn.

my immediate guess is that the big horn is essentially "long throw" so you don't hear squat close in.

the other curious thing is that the only HF stuff is a single multicell in black up top, one on each side. Also some sort of JBL-ish long throw looking "baby cheeks" horn in black again, under the multicell... can't see any way that the HF stuff can possibly reach 146dB, probably nothing within 20+dB of that is my wild guess.

then too the polar response of this rig?

Probably one could save some $$ on the heat exchangers by just using CO2 to make "dry ice"... it only has to run for a few hours at a clip, right?

Reaching that much SPL is not so easy - and they've not got all that much power backing the rig, even with the horn loading helping...

But as I said here and elsewhere WRT this rig, it does look exotic, and probably thumps pretty good too! 😀
 
can't see any way that the HF stuff can possibly reach 146dB, probably nothing within 20+dB of that is my wild guess.

Not very many systems of any type can reach full output anywhere above a few hundred Hz. Mid/HF drivers just don't have the power handling, and even the 6dB per doubling rule breaks down after about 3 doublings. Even in simulations I get an upper limit of around 140dB at 500Hz and it just doesn't seem to go higher. Real world will be less, and continues to fall off with frequency. A single point source horn would have no hope.

Even these modern so-called best thing since sliced bread line arrays seem to have troubles in the mid range. I've heard far too many simply run out of headroom in the vocal range. There is no free lunch getting those kind of SPLs above the bass/low mid range.
 
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