kodomo

I can get B&C 12nw100, what do you guys think about it? I think I should get 4ohm version and wire in series to get 8ohms. However it is only 92db efficient around 120hz. Two of them will get me 95db and the horn is supposed to add another 6db, which would be 101db. This wont be happening lower than 120hz though... How much volume I need in the chamber for these woofers and as these were mainly designed for bass reflex, do you think it would be a problem?

I plan on starting a second system project with these. What are the qualities I need to look for the 12" woofers for this horn? My only concern is the sound quality and I want to get about 103db+/1w/1m efficiency. I will build these sealed and drive from 70hz to 600hz where I will cross them to a Yuichi 290hz horn with 2" cd (probably radian 850pb-be as I love it) up to around 5khz and then a fostex or a visaton bullet horn tweeter. I plan to build two matching 20hz-80hz subs to go with them. This is the initial plan. So any recommendations

I guess Radian 745beryllium could be a very good candidate for the e-oswg-15.

I had a similar idea for friends systems. A more reasonably priced 2-way. I thought having this http://www.horns-diy.pl/e-oswg-15.html You can put jbl's or seleniums you have as you get a good price Bass solution, would be ported with appropiate cabinet size and a good matching driver. add x numbers of subwoofer

I have experienced a round horn and I really liked what I heard. I have the original klipschorn squawker, the volti v-trac and a rectangular cf190hz tractrix horn I have built. The cf200 round tractrix horn sounded less coloured. I could also hear instruments seperation better as if they had air around them. The sound didn't strain. I thought it didn't sound strained before but after hearing the round one I was surprised. I think having multi-channels and having the jmlc between 1800 to 10800, will help the system not being beamy. I also am not planning to push any driver or any horn in the system to its limits. My ceilings are 3meters tall. There will be acoustic absorbers on the ceiling in the first reflection zone and carpet on the floor.

I have completely changed what I am doing and decided to make a big project. I will continue working on it till it sounds right hORNS.pl is making my horns. I bought the drivers from various dealers. I have minidsp to work on crossover adjustments and then I will build a passive one for 160hz upwards. This is the system: 20hz - 38hz - Eminence Tapped horn I built with hypex plate amp 38hz - 160hz - Sealed bass arrays with Scanspeak 30W4558t00 driven by 1200watt x 2 amps 160hz - 600hz - 110cf round tractrix with Supravox 285-2000 alnico 600hz - 1800hz - 200cf round tractrix with Radian 850pb 1800hz - 10800hz - 1000cf JMLC with Radian 475 beryllium 10800hz - 45000hz - Fostex t500amkII

Why do you need to find the acoustic centre? If for alignment purposes, what I say is incredibly precise method to do it. Your mics are ok, and with REW you can do it. Juts get a multi channel soundcard from someone. I dont know about clio, maybe it is already capable of doing it, you should ask people who use that.

As I have a music studio, its easy for me. I have a few multichannel sound cards and microphones. You don't need a measurement mic for this, but you need at least a two channel sound card. You need to setup a loopback for reference purposes so that the program doesn't take your impulses automatically to t=0 That is a second channel feeding itself for reference. Then, in rew, just use the loop back as the time reference

Please consider having the tweeter time aligned Arash. I have been experimenting with this extensively and we have chosen the tweeter vertically, horizontally aligned over all other placements. With impulse response, you can fine tune the placement. I suggest using a delay for aligning with the bass too, as with Klipsch we cross around 300-350hz minimum and is quite high and the effects are audible. I really cant understand why people do not care about time alignment. I think it is because people did not have the chance to hear aligned or at least more aligned horn systems. When you spend time with that sound, and then turn back it is very easy to hear the difference. Also jamboree is very high and the midrange and tweeter will be even higher. This creates a soundstage like a stage you hear from the pit at a concert

Great Arash! as expected from you

What profile? What cutoff frequency? What is the dispersion you are looking for? I have built one that is tractrix with 190cf. It is rectangular mouthed, has wider dispersion horizontally. You can find the plans and the build @ https://community.klipsch.com/index.php?/topic/153762-bruce-edgar-tractrix-horn-project/page-4

The autocad dwg that Arash has put here works. I got autocad and checked it.

I cross around 6.5khz, it beams but not more than volti v-trac. The BMS 4592nd-mid 16ohm driver has a bump around 4khz and that is heard. The horn itself resonates a little as it is not braced to a chassis like the volti horn or Klipsch horns. This causes some sounds to be located coming from the speaker (less than stock klipschorn). They cant detach as good as a well braced one like v-trac. I think as it resonates it also creates a timbre which colours the sound. These are the areas I have to work on. However, the sound is more relaxed (sounds like more headroom) and has more dynamics. The integration with the bass is better. My crossovers that Greg built have 6db rolloff around 360-380hz. He has put 3 choices for the bass inductor. Low, mid and high. With the v-trac, the meaurements looked better when I used to choose the high setting but then it muddied the presentation, and it did not sound good. When I used mid setting, I was compromising some spl for clarity. There used to be a dip around 380hz. When choosing low, it lacked certain weight and had a bigger wider dip. Now with this horn, I can choose the low setting but it still measures very flat and sounds very clear. I can hear the tone of the bassdrums and the body of the bass guitars better. If the height wouldn't be an issue, I would build another tractrix with 1" mouth and 1khz cf, and cross it around 2khz. Then cross to my tweeters around 8khz. To do that, I have to change the bassbin too, otherwise the midrange and tweeters would be too high. One can use Inlows 80hz midbass with these tractrix I have built and 1khz tractrix on top of that plus tweeters. I have built tapped horns that can work below that, though 80hz would be too high for them to cross and sound as good as the klipschorn bassbin. I may put the v-tracs back on top one day, then build a 5 way system with what I have built

And here they are on top of my horns. I am very happy with the integration to the bassbins (soundwise) It sound even more effortless then my fc253hz tractrix's built by Greg. I put some tops on the bassbins and put these on that. I am planning to make a rigid rectangular piece and attach it to the lips. That bracing will help with the sound and make it even better according to what I hear. So not many problems, I am overall happy with this project! Here are some shots

Here they are painted. The second photo is to show the relative size to a klipschorn. I will take off the tophats and put these. This weekend will be a lot of listening and measuring and listening and some more listening