I don't plan to use it anymore but I will decide later when I finish installing the system. I may keep it at the back of the sofa on its side and only use it for home theater
I will post measurements of each horn without crossover and also how they behave with different crossovers (1st, 2nd, 3rd order etc)
I also plan to make a 2" cd shootout between bms 4592nd-mid and radian 850bp.
Here is some more progress. I forgot to take photos when tweeter was in place. The 1000jmlc with 475 is normally positioned on top of the fostex t500amkII's. Here they rest where the tweeters are supposed to be...
Attachments
horn system
And think about 110hz Tractrix horn.
In bass i have 25hz tapped horn, midbass 95hz exponential (15inch driver), mid jmlc350, highs jmlc1400,
I also currently building horn system.
And think about 110hz Tractrix horn.
In bass i have 25hz tapped horn, midbass 95hz exponential (15inch driver), mid jmlc350, highs jmlc1400,
Nice project.
I am building a 5 way system with many similar components:
Fostex T500
Autotech Tractrix 1000 with Radian 475be
Autotech Tractrix 200 with JBL 2446 & Truextent
2 x Acoustic Elegance TD12M in sealed enclosure
Acoustic Elegance TD18H+ (with apollo upgrade) in 150 liter reflex
I use Groundsound 8 channel DSP and therefore i need to make a passive crossover between T500 and Tractrix 1000 with Radian.
My listening room is small so i must place the components as compact as possible.
I will follow your thread with interrest and remain with photo of my system when it is ready 🙂
I am building a 5 way system with many similar components:
Fostex T500
Autotech Tractrix 1000 with Radian 475be
Autotech Tractrix 200 with JBL 2446 & Truextent
2 x Acoustic Elegance TD12M in sealed enclosure
Acoustic Elegance TD18H+ (with apollo upgrade) in 150 liter reflex
I use Groundsound 8 channel DSP and therefore i need to make a passive crossover between T500 and Tractrix 1000 with Radian.
My listening room is small so i must place the components as compact as possible.
I will follow your thread with interrest and remain with photo of my system when it is ready 🙂
Hey good to hear someone walking a similar path. You can ask me anything you would like to.
I love the Fostex and I am using it with my current system. I tried the Radian 475be and I really like it. They work quite well with fostex too.
I have minidsp but just to check the crossover points. I am doing it with one speaker, so 2x4 was enough for me to try. The bass I uild with TAD's have their filter already. Actually I am building just one speaker, testing everything with it in mono and then will build the second one. Change whatever needed with the construction etc.
I have listening distance around 2,5 meter. I hope i dont get trouble with vertical loobing.
Also the passive crossover between Radian 475be in Tractrix 1000 and Fostex T500 could be a challenge because of the breakup around 10K on T500.
Also the passive crossover between Radian 475be in Tractrix 1000 and Fostex T500 could be a challenge because of the breakup around 10K on T500.
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10db jump at 10khz, yikes! You might get away with then firing forwards(parallel) as the off axis is smoothed out a bit. The difference between 0 and 30deg is huge, so I bet small changes in the angle great effect the HF response? Does your frame allow for adjustment? Or does it sit on top?
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The 10k jump is probably intentional- it's meant as a supertweeter, so think of it like a REALLY nice start to a 10kHz crossover 🙂
If you filter t500amk2 around 16khz with 6db and the 475be around 8khz with 6db, they cross around 12khz without problems and you get similar efficiency so you dont need extra attenuation on 475be.
I filtered the t500amk2 at 12khz with 6db as well, it still sounded good and crossed well but with 16khz, it fills the spectrum quite silky without taking attention to itself.
I filtered the t500amk2 at 12khz with 6db as well, it still sounded good and crossed well but with 16khz, it fills the spectrum quite silky without taking attention to itself.
Do you have measurements of crossover slopes and summing with this setup?
And have you time aligned them?
Time alignment of a supertweeter crossed over at 16kHz is delusional...
(but luckily it doesn't matter!)
M.
Yes they were time aligned in all instances with impulse response and no it is not delusional. I use 6db filter, so even if I filter starting from 16khz, i still get an audible signal down to 8-10khz. I don't know if you have tried, but I have and it is audible.
I don't have the graphs but I will post all of the measurements later when I arrange them and classify them. I have too many measurements at hand! Beyond measurements, when I make a change I let it stay for at least 2 weeks. It takes that much time for me to get it a tad more objectively...
I don't have the graphs but I will post all of the measurements later when I arrange them and classify them. I have too many measurements at hand! Beyond measurements, when I make a change I let it stay for at least 2 weeks. It takes that much time for me to get it a tad more objectively...
Just try to repeat the measurement with the microphone just 10mm or 20mm to the right or left, and then tell me if the impulses are still aligned.
(BTW: I don't know if you noticed, but you have two ears separated by approx. 15cm...)
I understand where you are coming from and I am not offended for your reminder of the distance between my ears 🙂 As much as I am aware of that distance, I also am aware of what I hear with them.
I listen extensively with and without alignment. As a klipschorn owner I also had to live with a time alignment issue because of my folded bass horns. I really don't know of your experience. My actual experience with on and off alignment is very significant and not very hard to hear too. If your system is active, just offset the time of your drivers and try. If they sound the same to you no problem. They do not sound the same to me with my crossover, drivers and room.
Yes, I choose a specific point to make the measurements but it corresponds to what I hear. I know only of my own auditory experience. I choose to listen to what I hear the best and am quite satisfied it somehow works with the measurements.
I listen extensively with and without alignment. As a klipschorn owner I also had to live with a time alignment issue because of my folded bass horns. I really don't know of your experience. My actual experience with on and off alignment is very significant and not very hard to hear too. If your system is active, just offset the time of your drivers and try. If they sound the same to you no problem. They do not sound the same to me with my crossover, drivers and room.
Yes, I choose a specific point to make the measurements but it corresponds to what I hear. I know only of my own auditory experience. I choose to listen to what I hear the best and am quite satisfied it somehow works with the measurements.
That is a very different issue. I agree that time alignment (and especially phase matching) does matter at lower frequencies (< 5 kHz).
I am just not convinced that it still matters (nor that it is in fact achievable in practice) at 'super-tweeter' frequencies.
Amicably,
Marco
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