Point Source vs Line Array| KV2 Audio

George Krampera, one of the founders of KV2 Audio, explains the difference between point source and line array.

[linandy]

In the beginning, there was a box. Awesome !

[Steveleebdutoit]

Interesting video. Also, if you drink every time he says "Know" you get messed up.

[rodellalexander]

Very clear and concise explanation, they (KV2) do point source the way it should be done.👍👌

[TimpBizkit]

When you NEED more than one speaker, the line array is usually the best way to try and combine them, although the Synergy horns probably do the horizontal splay/cluster better than any other speaker does, when angling at their -6dB points.

[steevests]

Delays and interferences provided by the bottom line array system do not affect drasticly the audience on high frequencies at the end of the venue/ mixing console. Both angles, and Fresnel circle theory affect the spl at a given point.

[panjacus]

you can hear "no" somehere between 10 Hz - 20 kHz

[mykdubz]

SO that basically means, knaw, that if you don't invite people to your event, knaw, you have better high frequency output, knaw... Since Corona this really is a valid point, knaw...

[caseykittel]

Wow. I am trying to set up 6 two way cabs (3 per side) on top or 2 big double 18” subs. I notice the interference effect playing pink noise as I move through the room. This lesson is really helpful. I am considering dropping down to 2 - 2-way tops per side and aiming each side across each other, so they horn load. Maybe this will reduce the comb effect. Right now each side is one one plane aiming to the idea listening position.

[karstenpe]

What they are not saying though is that in a linearray most people only hear one of the boxes (in the high frequencies). Because line array boxes have very narrow vertical dispersion.

That being said - I would love to hear a VHD 5 system. I've mixed on KV2 systems before. And they sound pretty good.

[hamarfourmusicproduction]

Despite the differences between line array and point source being dispersion or coverage, is there any other difference between line array and point source speakers with reference to the manufacture components eg inbuilt cross over unit, voice coil ?

[MrEnginears]

I get what KV2 are doing, with each frequency source being the same size & shape as the others relative to their wave-lengths, in order to get the same dispersion characteristics on each freq band, but I thought that was a pretty poor explanation of it.
I guess talking in a 2nd language didn't help though.

[Tuings]

Love how he didn't answer the question about loss over distance. It's still 6db per double distance for point source. And 3db for a line array.. ( in ideal conditions)

[SoundSystemDesigner]

I wonder if when he refers to line arrays, he means concert-J-arrays? I've used 3-meter line arrays in high RT60 environments with amazing results. You have to know how to put all listeners in the lobe, and yes, they don't have bristling high-end, but they work amazingly well due to their vertical control and their 1/r drop-off which way outperforms a point source in such environments. Basically, you get intelligibility for the sacrifice of some high-end. Most commercial and PA applications are fine if you can squeak from 10kHz out of your system.

[morganbelle]

What about directivity? I think this is a huge plus of line arrays. I see no chance of using single point sources in reverberant arenas...

[rikwashburn]

Dr Christian Heils “step theory” . Paper that started Line arrays future to dominate ALL performance systems to this day. AES ‘92. Vienna.

He must have missed that . “Wavefront Sculpture Technology”

And Danley is the point source king. Nothing against them for stadiums, just don’t make me tour with ‘em.🤪

[sledge]

Hearing 2m tall LineArray/Columnt speaker with time difference of 2 ms (= 0, 6 m) will be correct for the distance of 3 m. But this is not "large distance". For just 10 m far way, the time difference for 2 m LA would be less than 20 cm/0, 6 ms and this is basically the minimum distance in larger venues (as the LA is almost always hanged up). For 20 m distance, the time difference would be 10 cm/0, 3 ms; 40 m (which I would start to call "far enough") - 5 cm/150 microseconds.... so simple trigonometry will ruin George!s argumentation against LA's completely.... its obvious...

Another lie is that "ideal linearray works at low frequencies, not above..." actually at low frequencies it behaves as point-source, only at higher freqencies (with respect to distance, frequency and height of the LA) you can expect line-array beavios. If you are far enough, every LA turns to point-source/ -6dB SPL per double distance (in the moment when Fresnel zone contains all loudspeakers). The lower the frequency, the closer is the transition point between point-source/line-array radiation (6 dB/3dB per double distance).

LA doesn't sum at higher freqs? For true line array (column speakers), they did sum, especially at higher distances....

[jakelappygames]

Lets all just ignore D&B Array Processing, and Ignore the fact that MLA is a thing or the fact that we are all aware that you have to time-align your system

[peteryousef]

please i need a video how to calculate how many speaker i can connect together in one sub ?
the important information about line array before i buy it

[michaelfoss]

What he completely dodges is that when you need more SPL (at larger events) you would have to add more boxes of KV2. But than you are right back at the very 1st picture he drew except that the tweeters are in a different pattern. But you would still have phase cancelling throughout the system. It doesnt make sense.

[thomasflatz]

From acoustical point of view he might be right, but not from business side: The point source must match exactly the requirements, you can't scale it. And this means for upscaling and downscaling. For today's rental business are line arrays just the best solution, with all advantages and disadvantages.