Very impressive! Thank you!
I was not sure which driver is the best to replace original Eminence from volvotreter...looks like Eminence 4015LF is really good!
I'm using another driver from 18Sound now going to change for Eminence.
I was not sure which driver is the best to replace original Eminence from volvotreter...looks like Eminence 4015LF is really good!
I'm using another driver from 18Sound now going to change for Eminence.
I have a continuous rotary encoder for phase on my hypex amp I use with my tapped horn. I rotate it and measure until it is ok.
It works below 60hz, so time alignment is not a big issue. Still it sits about 3,5 meters closer to me than my main speakers. This makes up for some of its long folded path...
It works below 60hz, so time alignment is not a big issue. Still it sits about 3,5 meters closer to me than my main speakers. This makes up for some of its long folded path...
Its solved by flattening the impedance of 285 in crossover... Also my supravox 285-2000 are modified by removing the dust cap etc.
How do you feel the Supravox are in handling that critical range with regard to instrument tone, dynamics and weight?
I am getting more satisfied by the day. It took some time and effort to tune them. It is also the only driver I had whose sound opened up so much since I started using them. They started out as boomy and without much texture and detail. Now it is sounding quite open and detailed. Tuning of the back chamber, flattening of the impedance and playing for at least 20 hours have put them in the right track.
new measurement
I am still making small changes.
Internal volume of the back chamber has been reduced and damped with very thick felt.
+/- 1db attenuation changes in channels relative to each other
Here is the latest SPL response from my listening point, which is about 530cm's away from the drivers acoustic centres. It is 1/12 smoothed
I am still making small changes.
Internal volume of the back chamber has been reduced and damped with very thick felt.
+/- 1db attenuation changes in channels relative to each other
Here is the latest SPL response from my listening point, which is about 530cm's away from the drivers acoustic centres. It is 1/12 smoothed
Attachments
I forgot to add, I also set the crossover of my tapped horn to 30hz with 18db/oct. It was at 60hz before, but now the upper bass horn and the Tad bass boxes are set and better adjusted, I do not need it to work up to there. This seems like an overkill but it really makes a difference, it changes the general feeling and creates a stronger foundation.
final touches
I can finally declare I have finished building my speakers 🙂 Well, at least technically, further than this will be all about aesthetics and different trials to learn new things...
The final things I was waiting to do were, putting the granite bases under the bass reflex woofer boxes, spiking the br boxes, and putting the rockwool covered with felt opposite the drivers in them. Now that I finished that, the incredible spacious sound of the system extended down to lowest bass too. I am very very satisfied!
ps. My plans for the next months will be trying a JMLC 270 horn, instead of tractrix 200 horn to hear the difference of representation. I may change the 110hz horn to wood with the help of my Iranian friend Arash which can only better this insanely good response from upperbass horn. I am designing a static frame which is more aesthetically pleasing.
If I do these, and succeed in keeping the sound as good as now or even better, I will have close enough material to build another pair, except for the crossovers and the tweeters. I plan on trying a raal lazy ribbon for that pair and hopefully sell it and finance more diy projects. I was already approached by people to sell them my system but I have told them I am not finished and it is my prototype.
I can finally declare I have finished building my speakers 🙂 Well, at least technically, further than this will be all about aesthetics and different trials to learn new things...
The final things I was waiting to do were, putting the granite bases under the bass reflex woofer boxes, spiking the br boxes, and putting the rockwool covered with felt opposite the drivers in them. Now that I finished that, the incredible spacious sound of the system extended down to lowest bass too. I am very very satisfied!
ps. My plans for the next months will be trying a JMLC 270 horn, instead of tractrix 200 horn to hear the difference of representation. I may change the 110hz horn to wood with the help of my Iranian friend Arash which can only better this insanely good response from upperbass horn. I am designing a static frame which is more aesthetically pleasing.
If I do these, and succeed in keeping the sound as good as now or even better, I will have close enough material to build another pair, except for the crossovers and the tweeters. I plan on trying a raal lazy ribbon for that pair and hopefully sell it and finance more diy projects. I was already approached by people to sell them my system but I have told them I am not finished and it is my prototype.
Attachments
A really impressive journey. Considering how good your prior system sounded, this must be amazing.
ray
ray
Hey Ray!
This system sounds so much better than that system you heard it is hard to believe. I have spent two years on this prototype alone but I am glad I did that.
Just to make sure, we connected the old speakers and listened for the differences, it is not just night and day. It is a day on another planet!
Hi
Do you hear any problem with the big mismatch in radiation pattern between Tractrix 200 and JMLC 1400?
As you know i use Tractrix 1000 above Tractrix 200 and the pattern matches but since it is more narrow then JMLC 1400 it is less "air and space" in the soundstage.
I think that the most important is to keep the radiation pattern equal in the crossover frequency but i might be wrong? 🙂
In the post #2320 you can see a test with the cheep 18sound XT1086 waveguide(with Radian 475be) crossed over at 2000 Hz. I dont use Fostex T500 here. My first impression is that the soundstage is more coherent and the >10000 Hz area are much better than the Tractrix 1000 alone.
Hornlyd i et lite rom - Side 116
Do you hear any problem with the big mismatch in radiation pattern between Tractrix 200 and JMLC 1400?
As you know i use Tractrix 1000 above Tractrix 200 and the pattern matches but since it is more narrow then JMLC 1400 it is less "air and space" in the soundstage.
I think that the most important is to keep the radiation pattern equal in the crossover frequency but i might be wrong? 🙂
In the post #2320 you can see a test with the cheep 18sound XT1086 waveguide(with Radian 475be) crossed over at 2000 Hz. I dont use Fostex T500 here. My first impression is that the soundstage is more coherent and the >10000 Hz area are much better than the Tractrix 1000 alone.
Hornlyd i et lite rom - Side 116
I also listened extensively with JMLC 1000 as I had it at hand, and was my first choice, as I had similar concerns. Then I got the JMLC 1400 and it sounds much better with the rest of my system and I hear no problem of integration. JMLC 1000 and tractrix 1000 are closer sounding so you may have a guess there. Everything is a compromise so listen and choose which one you prefer 🙂
Also we cross over on different points and use different crossover topologies, so it will be different results...
Also we cross over on different points and use different crossover topologies, so it will be different results...
Yes, I do. The sound is a little more open and although with more detail, it is still relaxed.
The attenuation levels are really making a big difference too so as the toeing in procedures around these regions. So experiment with them. 1db up, 1db down and keep it at least a week. These make nearly as much difference as the changing of these lower tweeter horns!
The summed up result of both speakers at the listening spot may not show up much spl change within the measurements but -+1db attenuation with this horn changes the actual presentation. One can enjoy both results. The relative midrange horn -+1db change also makes a difference... So more to experiment there... Experiment but keep at least a week to sink in. Otherwise sometimes a little more detail, or just the sake of change can sound desirable.
The attenuation levels are really making a big difference too so as the toeing in procedures around these regions. So experiment with them. 1db up, 1db down and keep it at least a week. These make nearly as much difference as the changing of these lower tweeter horns!
The summed up result of both speakers at the listening spot may not show up much spl change within the measurements but -+1db attenuation with this horn changes the actual presentation. One can enjoy both results. The relative midrange horn -+1db change also makes a difference... So more to experiment there... Experiment but keep at least a week to sink in. Otherwise sometimes a little more detail, or just the sake of change can sound desirable.
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