Electronics > Beginners
Power wise to put on a big concert must be incredible
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dmills:
LED is fine for some things, but suffers from a brightness issue, you can make a large area emitter that puts out a lot of photons, but you cannot really make a high brightness (lots of photons from a small source) LED at this time.

This is a problem if you want to do anything involving a sophisticated optical chain, and is why led is usually not seen in profile type lanterns (and when it is they often cheat by imaging the LED surface rather then having a focal plane in the gate like a real profile does. This is a problem when you use the shutters or a gobo.

The big thing with speakers was a perfect storm of better magnets, better computer models, better DSP and cheap light weight multi channel power amplifiers at useful outputs.

Regards, Dan.
schmitt trigger:

--- Quote from: dmills on July 19, 2018, 10:52:57 am ---.................and cheap light weight multi channel power amplifiers at useful outputs.

Regards, Dan.

--- End quote ---

Indeed!
Class D amps fed by a switch mode power supply.
dmills:
The old Crown MA5000VZs and such like, (5U, and a 2 man lift) were dropped from the touring sound game like hot rocks just as soon as really reliable class D hit the scene. Same thing with analogue consoles and interconnection, ethernet or MADI is just so much less of a pain.

I can now carry 6kW of amp with one hand, and far more importantly the amps are cheap enough to allow one per speaker driver, with output feedback to a DSP running a model of voice coil temperature and displacement, which lets you get one hell of a lot more out of a given driver without risking damage. 

There are even steerable (phased array) speaker hangs these days, which are very, very cool technology.

Regards, Dan.
lordvader88:
Sorry guys I was under the influence when I made this thread.


But yeah some ET/EE gets paid good money for making sure it all works.
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