Super tweeter frequencies would be over 20.000hz as up to that the tweeters are ideally should be able to reproduce. I am not using the fostex as a super tweeter only but as actual tweeters. They cross at 12.000hz and are still in the picture although dimmer at 8.000hz.
You shouldn't get convinced by what I write here but you can get motivated to ask the question if it would be possible and then try and find out for yourself 🙂
Semantics, perhaps.
I (and many others) consider frequencies > 7 kHz or so to be 'supertweeter territory'.
Cheers,
Marco
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Wiki is on of the most basic places one can look into to have an idea on the general consensus.
https://en.wikipedia.org/wiki/Super_tweeter
https://en.wikipedia.org/wiki/Tweeter
Lets not turn this into a polemic and return to topic please 🙂
https://en.wikipedia.org/wiki/Super_tweeter
https://en.wikipedia.org/wiki/Tweeter
Lets not turn this into a polemic and return to topic please 🙂
new frame and new crossover ideas
I have redesigned the frame, dumped all the wood and made an adjustable in two axis, steel frame. It also has rollers so I can move it around until I am satisfied with the room integration.
I keep on measuring but for now what I hear is right is as follows;
160hz-640hz - cf 110hz Upperbass horn with Supravox 285-2000hf
640hz-3800hz - cf200hz midrange horn with Radian 850pb
3800hz - 7600hz - cf1000hz upper midrange horn with Radian 475be-pb
7600hz - open - Fostex t500amkII
I am still continuing to explore and experience different crossover points and integration of the drivers but the above seems to be what these drivers with relevant horns want to cover.
By the way a friend of mine asked me about my crossover points. For example for 640hz-3800hz coverage of midrange, I have 1200hz and 2000hz 6db slopes. For the 3800hz-7600hz coverage of upper midrange I have 3600hz and open on top...
I have redesigned the frame, dumped all the wood and made an adjustable in two axis, steel frame. It also has rollers so I can move it around until I am satisfied with the room integration.
I keep on measuring but for now what I hear is right is as follows;
160hz-640hz - cf 110hz Upperbass horn with Supravox 285-2000hf
640hz-3800hz - cf200hz midrange horn with Radian 850pb
3800hz - 7600hz - cf1000hz upper midrange horn with Radian 475be-pb
7600hz - open - Fostex t500amkII
I am still continuing to explore and experience different crossover points and integration of the drivers but the above seems to be what these drivers with relevant horns want to cover.
By the way a friend of mine asked me about my crossover points. For example for 640hz-3800hz coverage of midrange, I have 1200hz and 2000hz 6db slopes. For the 3800hz-7600hz coverage of upper midrange I have 3600hz and open on top...
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Is the Radian 475 a 8 ohm Version?
Which values do you use on the crossover between Radian 475 and T500?
Are you satisfied with the time alignement betwen theese? And is the response in the crossover region coherent and even?
Could you please post a Picture from the side of the placement of them? It will help me in my design of the cradle 🙂
Which values do you use on the crossover between Radian 475 and T500?
Are you satisfied with the time alignement betwen theese? And is the response in the crossover region coherent and even?
Could you please post a Picture from the side of the placement of them? It will help me in my design of the cradle 🙂
Yes it is the 8 ohm version with beryllium diaphragm. I am currently using dsp to test out crossover points. Only the JMLC1000 is fixed, tha bass horn, tweeters and the 200hz horn can be moved up, down, forward or backwards.
I can not cross it as high as I wanted to fostex, so I am in the process of testing it out with a JMLC1400. I will let you know the differences between 1000 and 1400 with radian 475be-pb 8 ohm.
I was planning to use the 200tractrix with 850pb in a narrower band but it will be crossing at 3800hz (higher than I anticipated) so JMLC1400 may be a better option there too.
I am listening and measuring and trying to listen to what system wants to play. I am trying not to dictate my preconceptions about it. As of now, the crossover points are as follows but this does not mean it will stay that way for sure.
160-640 - 110tractrix with supravox
640-3800 - 200tractrix with 850pb
3800-7600 - 1000jmlc with 475be-pb
7600-open - fostex t500amkII
3.5 meters, they integrate beautifully but 4 is better, you are like in the front row, similar to my current volti system but the stage has better depth than that. 5 or 6 meters and it is like an imax projection of sound in front of you. Not exegerated but as big as my front wall and this is with a mono channel! One important thing is they sound better if at least a meter away from the back wall.
You might get more solid bass if you used spikes instead of rollers. Nice speakers. I love horns.
Bass speakers are on spikes. You do not see them on the photo. I did not put them together yet. All parts are cut but not yet glued and painted. They are a pair of bass reflex cabinets utilising two TAD 1601b each.
Horn system that you see up here is very inert but still the rollers are temporary until I finalise their position in the room. I will take off the rollers, and they will rest on decoupled feet.
Hi Komodo ... looking great! Terrific job there. Would you post more pics of the frame from different angles?
G
G
I don't know if this is an issue with your speakers, but I have the big Heils outboard of a pair of wood 350hz tractrix horns and I was getting reflections off the side of the horn from the Heil so I put a piece of thin foam on the side of the wood horn and it cleaned up my hights just a bit.
Are you getting reflections off that big horn's outside from your tweeter?
Are you getting reflections off that big horn's outside from your tweeter?
I will snap some photos for you on the weekend Gluca 😉
There may be some reflections from the top of the bass horn but when the tweeter is crossed over 10k, this is not a big problem. The wavelength is less than 5cm's, so it wont be a primary concern. Still I may add some absorbing material at the top back of the bass horn. I do that with my klipschorns now. The fostex are on top of it and there is a 3cm thick felt mat in front of them. It creates a difference.
Agree on the texture! I like the matte look. I just spent the afternoon applying plastidip on my tweeter horn, and it came out quite similar.
Are the Paint job professionaly done?
Are the Paint job professionaly done?
The paint job on the horns is professionally done. The paint job on the frame is good old spray paint 🙂
I have taken the crossover point of the cf 110 upperbass horn higher. It is now playing up to 800hz where it crosses to midbass horn.
As far as I can say, I could have gotten a JMLC 350 instead of the tractrix 200 for the midbass. It would have been shallower and may have interacted less with the upper midrange horn. I could have put it 5cm's lower than the 200 tractrix. This is a guess though. I don't have it and I haven't measured it with my drivers. As I use the tractrix 200 for 800hz to 3400hz, it seems it can be covered by JMLC 350 and the natural high pass of the JMLC 350 may have helped me.
I have taken the crossover point of the cf 110 upperbass horn higher. It is now playing up to 800hz where it crosses to midbass horn.
As far as I can say, I could have gotten a JMLC 350 instead of the tractrix 200 for the midbass. It would have been shallower and may have interacted less with the upper midrange horn. I could have put it 5cm's lower than the 200 tractrix. This is a guess though. I don't have it and I haven't measured it with my drivers. As I use the tractrix 200 for 800hz to 3400hz, it seems it can be covered by JMLC 350 and the natural high pass of the JMLC 350 may have helped me.
What did you do, take the crossover point higher or replace the horn. I was wondering about your project, any photos or info?
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