Dave Rat Transmission: Smart Amplifiers = Huge Changes In Professional Audio
With manufacturer-specific smart amps (and also increasingly, powered/processed loudspeaker systems), there's an opportunity for a fundamental shift in exactly who really has control of the starting-point sound of a PA system.
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Reminiscent of how large-scale line arrays caused a monumental change in professional audio, I believe we’re in the midst of another massive shift.

The days of “conventional power amplifiers” in upper-level sound reinforcement are dwindling, replaced by the newer, rapidly emerging breed of “intelligent amplifiers” outfitted with sophisticated digital processing and sometimes, a whole lot more.

After this new generation of amplifiers of intelligent amplifiers ("smart amps") was introduced, it took me a while to get my head around the concept.

Incorporating digital processing in every single amplifier seemed like a financial waste when one processor is capable of controlling so many identical amps.

But as I continued to ponder the idea, the more sense it made for several powerful reasons.

JUST A BAND-AID?
First, there’s the flawed concept that a bank of amps with the same model number are always identical.

The fact is that the output power of each amp is affected by its loudspeaker load, and rarely in the real world are all amps driven at identical loads.

Then there are issues like blown loudspeaker drivers and/or miswiring.

Smart amps are capable of analyzing loudspeaker loads, monitoring drivers and flagging improper wiring, and letting the operator know about these factors immediately.

This additional smart capability, in turn, allows loudspeaker manufacturers to further increase the quality and capabilities (i.e., sound better and get louder while blowing fewer drivers).

The plot recently thickened further with the (somewhat shocking) announcement by Dolby that they’re leaving the processor manufacturing business with the almost immediate discontinuance of the Dolby Lake Processor.

Yes, Dolby seems to prefer licensing versus making hardware. but for one of the top manufacturers of digital processors to pull the plug is saying something.


Comments (3) Most recent displayed first
Posted by Gadget  on  07/07/10  at  06:01 PM
I think another important benefit is the integration of new audio over ethernet protocols. Some of these protocols, over 1GB networks, can house an I/O of over 500/500 with less than 1ms. There are obviously specifics to this, but some of the systems have become as intuitive as: 'plug'-'assign'- and 'play'. This creates not just amplifier control but MASS system integration... the entire system then become intelligent.

It also pushes us into rethinking system architecture. Gone are the days of having specific amp racks and processing for different speaker systems. All you need now is just racks of "intelligent" amps... which are networked together... and you just tell each rack what it will be powering. DONE! This can be done to an even finer degree since some of these intelligent amps allow you to NOT just limit the output voltage... but to actually change the output rail voltage. A 2500W per channel amp can be easily changed to a 500W per channel amp... or have one channel be 2500W and another 250W... complete flexibility.

The next five years will be very exciting!

Posted by Rick Turner  on  07/07/10  at  01:07 PM
And why not go the next step and build power amps into the speaker drivers? This would allow phased arrays for aiming sound easily from line arrays for precise control of dispersion into any environment.
Posted by Curtis List (Too Tall)  on  06/27/10  at  02:26 PM
June 27, 2010

It seems to me that we went through a thread on this subject on the LAB some time ago.

What makes it interesting is I do not remember my opinion at the time.

I believe my opinion was focused on if it was a good idea to ask for a LCD (Least Common Denominator) for PA sound rather then “the best it could be”. A similar situation when asking for vocal mics in the tech rider where most ask for SM58.

On that situation I was against it, though in the end I suspect I would do the same thing as Dave (just not for vocal mics LOL).

NOTE: This does not address the room and where the speakers can be placed, which can make a huge difference. Where you may go from a basketball arena where the low steel is at 50 feet to an old auditorium with no place to fly.

This article came at it more from the hardware end, not the philosophy.

Dose it make sense money wise and for duplication of hardware?

Looking at the power amp the most expensive parts are the power supply and box.

So if you make a power amp you might as well stick a processor in there since you have paid for the box and power supply already.

What has to happen in the future is we need this processor to be as powerful as a Lake and cost less then a Crown PIP.

I have no doubt this will happen and that soon.

Too Tall

curtislist@gmail

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