Full Range Line Array Thoughts?

[mayhem13]

Being pressed with some installation limitations in a new home/media space i believe the only viable option might be a built in array. Given the recent slew of Tymphany Buyouts available i'm wondering if i should strike while the Iron's hot. Here's my thought..........

Two arrays comprised of 12 of these in each array grouped 2S-2S-4PS-2S-2S for power tapering( s-series/ps-parallel series)



http://www.madisound.com/catalog/pro...oducts_id=8659

......each side actively crossed at 120hz LR2 to stereo sealed 12" subs.

Here's the FR of the drivers for those willing to consider the idea as viable



My only concern is if i'll need a HF device of some sort(s)....maybe a centrally mounted super tweeter of high efficiency. It seems the consensus on such 'focused' arrays would require the Xo in the 4-5.5khz range but that seems counter productive to the use of 'full range' drivers? Throwing out some 'rules of thum(s)' could it work at say 8khz first order?

The other possibility is a 'Maggie" tweeter along side but there goes efficiency and power handling..........what's a guy to do?

Free Standing towers are out of the question due to ergonomics leaving only the built in arrays or a pair of high efficiency bookshelfs of the larger flavor. Kindly talk me in or outta love of this idea please?

[Henkjan]

ever since I heard a pair of DSP corrected "25"s (line array with 25 Visaton FR8) I have been thinking of doing something like this myself for my HT. there was no need for any added tweeter there (maybe consider a back firing 'ambient' tweeter), so with this Vifa there shouldn't be either. If you can afford some sort of DSP (like the Hypex AS2/100 amp&dsp) then do so, the difference was quite big (in favour of the DSP).

[mayhem13]

I'm hoping to go as minimalist as possible with this project so if i can avoid DSP and keep the filter 1st order simple i'll be a happy camper.

[John L. Murphy]

I'd like to invite all full range and line array enthusiasts to take a look at my new full range corner line array project at:

The Murphy Corner-Line-Array

This is a project using Dayton Audio's ND90 3.5" full range driver in a line array designed specifically for corner placement in order to optimize the placement of the room reflections. The design concept is sufficiently unique that I have formally disclosed this new invention in such a way as to place it in the public domain for the benefit of all.

Cheers!

John

[Henkjan]

Thanks for sharing this with us!

[Andrewbee]

I read the paper and look forward to updates by John.
I appreciate the theory as stated in laymans terms, even I could understand it.

I have never heard a line array (well at concerts but that does not count) and have been thinking about one for the last year or so to try but the cost keeps me at bay.

What I would like to know is ~efficiency of the finished speaker, how much power it needs, how are they wired, how much eq and where in the frequency band is required, enclosure damping, does the 1/2 inch bevel on the front of each driver hole affect the upper frequency response i.e. is there some horn loading happening and lastly (for now) does the cabinet not require any internal bracing?

Andrew

[norman bates]

I think the tc9 driver would be great for the $$.

It will take mucho eq to overcome the combing but for its purpose it should work well.

Home theater dynamics is a plus and the high intelligibility should make it a winner............

Norman

[MisterTwister]

yes, you will need efficient tweeter with these, more likely compression driver and horn or an array of small diameter tweeters (Dayton ND16FA-6 maybe)
there will be no sensitivity gain at higher frequencies ( frequencies that are beamed by woofers)
Parts Express: Project Showcase
for full range array I'd consider smaller FR drivers, such as HiVi B1S

[norman bates]

seems the line of 3.5" is down 3db at 4khz, so you can cross a tweeter in.

Or just run a long line of 3.5" drivers, you should be able to eq it with a 10 band equalizer.

It just depends on how you want to do it.

1 stout tweeter in the middle should work well, but now you have a crossover into changing impedances.

No tweeter then requires massive eq, and should have worse imaging in comparison.

I've been wondering what a kuze array or ids array sounds like.
Advantages* of the* IDS Technology
Parts Express: Project Showcase


A line a tweeters would add sparkle, but combing is always present.
I remember a selah array sounded better when you cover top and bottom tweeters.

Norman

[LineArray]

concerning combing

Simulierte Übertragungscharakteristik der Schallwand mit 6 Fullrange Treibern