http://www.audioroundtable.com/ArraySpeakers/messages/26.html

You can see some of the line arrays he builds, your biggest problem with line arrays that I see is getting the mid and tweeters close enough to together so you don't get comb filtering problems.

HTH
Bill W.

• Jim's white paper on Line array design

Bill's correct about the spacing; you can't have wide tweeter frames. I used a dozen 3/8" domes per side that were frameless round jobbies that I glued into holes in the baffle, so the dome to dome spacing came in at about an inch, which is good to about 10kHz for wavefront integration. Above that they comb, but only on the vertical plane of course, so that's a minor concern. BTW, they cost me $0.27 each.

These speakers cost me less than $60 for the pair, lumber included, and they sound quite literally like a thousand bucks.

Go with no less than 18dB slopes. Assuming the midwoofer and tweets are in lines that are side by side keep that distance as tight as possible and you need at least an 18dB slope to minimize crosstalk between the elements which would lead to serious combing on the horizontal near the crossover frequency.

What sort of output could you get from this line array? Most of the

These Onkyo tweeters are rated at 20w, so with 12 per side they're quite adequate; the same for the 15w midbass with eight per side.

This looks like a good use for my fly cutter.

Will details be in _aX_?

lon (who still has all ten fingers)

I noticed you cut holes in a lot of stuff like the Tuba
project.

So if I could draw in some remarks that TC had
about approaches to audio, do you see any of these
Tuba designs and Array designs coming together as a
complete solution or are they just discreet ideas?

I am still thinking back to the Snail designs of
yore and wonder if anybody ever built them (?) Or maybe
just for professional concert use. I liked the concept
for its complexity and elegance but it never has become
part of the vocabulary of the hobby... or has it?

My current home hi-fi setup of a Tuba 18 sub with TLAH mains (Transmission Line Array Horn) takes advantage of the respective merits of each concept. The end result of full spectrum 99dB sensitivity with minimum size and cost is one that I'm quite pleased with.

With the exception of Snail III all those boxes were pro-sound oriented, as are my DR horns. I'm aware of some people using Snails and DRs in the home, but the designs are less than ideal for that, which is why I came up with the TLAH.