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Following on from this post in the what are you building thread I thought I'd make a new thread as its gone on for a few posts. I did some "directivity" type plots of both the LTH142 horn and PH916 waveguide outdoors, using the lazy susan. Although my garden is pretty small it still is more open than my loungeroom. These were done at 2M distance, with no crossover except the 66uf protection capacitor, and smoothed to 12/octave for readability. Each reading is done rotated 7.5 degrees off axis, so I've got from 0 degrees (direct on axis) to 60 degrees available: Now I'm using a miniDSP EQ correction that makes the PH916 fairly flat on axis.. and I forgot to change this for the LTH142 when I switched over to this, which measures louder in the high frequencies. But it appears the PH916 has mostly better directivity as the FR falls off slower (narrower spread of lines), except it has more chaotic behaviour (notches appearing) above 12khz, while for the LTH142 although it has a notch on axis.. it actually gets smoother off axis at these high frequencies. I'm now toeing in my speakers @ 22.5 degrees to the listening position (and have adjusted the miniDSP EQ to suit), but as Paul mentioned getting the measurements across different angles has opened my eyes a bit. I'm still preferring the PH916, though it looks to me like for a more beamy response the LTH142 will actually give me more even high end frequency response. I'm currently set up crossing over at 700hz with a somewhat complicated MiniDSP EQ curve flattening out the response from the 800-3000 region. Still learning as I go here, but it's sounding pretty good.

Hi all, so i was previously considering a small line array project, but decided that to do it properly it would require more investment than i am willing to spend, and risk of turning out poorly is too high with the equipment i have. The speakers will be primarily for HT, with about 20% music, mainly rock/metal/electronic and some 60's/70's rock at moderate volumes. So, I stumbled across this "econowave design", I'm sure many of you have heard of it, seems to fit my budget and skills, but the availability of the drivers in many of the projects without having to pay hefty postage is a bit of a drawback. Its basically a high efficiency 2 way design with pro mid/woofer and horn tweeter. I am looking at doing an 8" version rather than the 10 or 12's which seem to be what most are doing. I have found, The Loudspeaker Kit stocks Daytons, although some reviews have said the Dayton horns aren't that great. But i stumbled across a local store that sells Eminence, which i'm very familiar with in the live music world, and seem to be nothing but positive reviews about them. So i had in mind this: http://www.ceceres.com.au/loudspeakers/pro-audio-speakers/eminence-alpha-8a-8-speaker.html With this horn/waveguide: http://www.ceceres.com.au/loudspeakers/horn-flares/eminence-apt150s-horn-flare.html http://www.ceceres.com.au/loudspeakers/hf-drivers/eminence-asd1001-s-hf-driver.html Crossed at about 2500hz. Its never going to have a whole lot of power going into it, I listen at far less than reference volumes as i have young children and live in a group of units, but this wont always be the case. Also the wife thinks the tiny pioneer (bose-style cubes we have are enough, so it needs to fit in her budget too....... I would say never more than 50w/channel will go into them, probably much less with the efficiency of them. I'd be using these for the front and centre channels reinforced with a sub crossed at 80hz. I'm in Adelaide so the fact i can get the speakers locally and not have to pay postage is a big bonus for my tiny budget. I would like to know if anyone has any other suggestions, if these speakers would suit the purpose or work together well. Height is not much of an issue for the enclosures but 8" is about the widest speakers/waveguide that will fit into the room without being too obtrusive. Cheers.

Hi all, After doing some reading, I’ve ordered a couple of Faital Pro 15PR400 mid bass drivers to team up with a compression driver/horn as a DIY Econowave style project. I am after suggestions for enclosure sizes, which for a sealed enclosure range from around 45 litres (Q = 0.7) to around 120 litres (Q=0.5). Vented options are around 90-100 litres, for an F3 of around 50 Hz. However, the Humble Home Made Hifi Calpamos speaker uses around 200-250 litres for an F3 of around 40 Hz. I am likely to be actively driving this unit via MiniDSP, and so have the ability to EQ the response. However, I would also like to make it able to be fully passive, which is where the enclosure becomes more important. I currently have a set of 120 litre enclosures to modify and play with, but am keen for enclosure alignment suggestions for the “good copy”. My wife is definitely likely to prefer the smaller enclosure, but this will restrict the low end if used alone. Any thoughts out there? Cheers! Matt