FSP-ARRAY

do you mean depth and height of the entire rack? It's only my opinion, but mantaining the same measure for width, depth and height (or multiple of that) it's more simple to load a truck. All the load will be straight, and square.

The to do list:

Finalize dimensions of the trapezoidal spaceframe.
Finalize 'rack height' - what is 1U?
Design a few modules
Decide whether to whack an amp module on the back, and if so, whether to put DSP on. Not EQ, DSP (protection, etc).
Decide on vertical dispersion

I'm currently designing some compression driver modules - that's why I was asking about CMCDs.

Edited by: Deadbeat

Even though i'll probably be prototyping some after I'm finished with the current project -

I'd just like to get to know who's interested in this one.

If you are...then feel free to post about dispersion or size or anything!

This is a community design, it's as much mine as it's yours.

Any feedback or thoughts are welcome.

Importantly, I also want to know what modules people are interested in...

I'm so interested to collaborate.[img]smileys/smiley20.gif[/img]
The simplest module to design could be mid, high mid and highs but all the designs belong to the final dimension of the space frame. However 1 U on a standard rack strip is 4 cm, is composed by 3 square holes 8mm×8mm spaced by 3 mm each one. Every U is spaced by 6 mm. I think the littlest module (piezo array? bullet array?) may be 2 U of height.

arrgh! Can't design properly without the space-frame.

I need frontal dimensions the most.

We've established a width of 580mm.

The height is the next thing - it will define what one 'FSP rack space' is.
Should it follow the normal rack space? There's no reason to.
Any ideas then? I think a supertweeter array should fit on one unit of height.

UPDATE:

Am looking at Faital Pro compression drivers due to throat tube-less design.

Also check out their horns - 18sound looks like it has some competition now!

This may seem like pure indecisiveness, but I have read through this ambling thread again and have come to the conclusion that a full rack wouldn't be ideal for a venture like this. Sure, it would be great for straight horns doing 120-250hz upwards or somewhere, but I believe that the kick section should be an integral part of the FSP-Array if it is every to be compact enough (at least in a 80hz low pass version).

The design is not finalised yet by any means but I'll share some more info later on how I visualise this in pictures as I can't describe it accurately without a doodle or two.

QUESTION:
I've read on a few papers that there's a rough frequency below which where a human cannot spatially locate the source of frequencies.

However I can't find the papers, I'm afraid.

Can anyone enlighten me?


Edited by: Deadbeat

UPDATE:

Does anyone have experience with mids with very high cone strength? I'm talking 'can stand up to quite high compression' here.

I think most dedicated mid speakers can take high compression. The tight chamber also adds to the control of the cone, which unlike a bass speaker has little or no visible excursion above 120hz. A good mid usually needs a light cone to keep up the sensitivity figure. A dedicated mid shouldn't reck itself in a small chamber.
Some Hi Fi speakers has stiff cones, but once again used for lightness as apposed toughness. A tight pod around a mid speaker used in a horn usually does the trick.

presumably not particularly stiff cone needed as even if it reached xmax the actual pressure even in realy tight compression chamber isn't getting that big?

are your sims showing something different to that deadbeat?