Naim Aro own cable with BNC adaptor. Lyra Phonocable prototype when we used the Pre-Pre. L`Art du Son "Blue" cable between phonostage and preamp. Preamp designed by me has a direct soldered cable that has the same construction then L`Art du Son "Blue". Twisted pair solid core loudspeaker cable.
Hello Joachim,
Considering the new name for the speaker TDL, it seems that the more diffuse and greater the off axis sound the more the sound comes from everywhere. The direct on axis sound will still be the dominant factor for ear-brain placement of voices and instruments but the speakers will be lost in terms shouting a pin point physical location of the speaker. Just keep the speakers away from the walls.
Are you going to equalize the speaker outside hanging from a tree or inside in the listening space?
DT
All just for fun!
Considering the new name for the speaker TDL, it seems that the more diffuse and greater the off axis sound the more the sound comes from everywhere. The direct on axis sound will still be the dominant factor for ear-brain placement of voices and instruments but the speakers will be lost in terms shouting a pin point physical location of the speaker. Just keep the speakers away from the walls.
Are you going to equalize the speaker outside hanging from a tree or inside in the listening space?
DT
All just for fun!
I whould love to measure in a big open space over say 200Hz. In the bass it can be done in the "extreme nearfield" and then the bass has to be adjusted to the room.
DT, nice theorem how a TDL works.
DT, nice theorem how a TDL works.
Joachim,
Flat Roof of a high rise. Pointing up. Raise speaker around 2m above the roof. You probably can get a low cost stage speaker stand that will allow this to be done without too much hassle.
Have a really tall mike stand (like the ones you use for the overhead mikes when recording drumkit cymbals) and you can get mike above at 3m.
Unless you are in the airport landing/takeoff flightpath no worry about reflections. Doing it early on a sunday morning makes sure you do not get too much background noise...
I have done it like that a few times.
Ciao T
Flat Roof of a high rise. Pointing up. Raise speaker around 2m above the roof. You probably can get a low cost stage speaker stand that will allow this to be done without too much hassle.
Have a really tall mike stand (like the ones you use for the overhead mikes when recording drumkit cymbals) and you can get mike above at 3m.
Unless you are in the airport landing/takeoff flightpath no worry about reflections. Doing it early on a sunday morning makes sure you do not get too much background noise...
I have done it like that a few times.
Ciao T
That's probably caused by the strong contralateral reflection of your setup. Does the perception change when toe-in is removed?
6.283, true. The cables are nothing special anyway. Homebrewn solid core stuff. The Lyra is a prototype and not availlable at the moment.
When we start to talk about listening impressions, everything count's. If the other parts of the system are known equipment, they probably have been evaluated on other systems, and a general trend can be found. I don't expect too much valuable data to be posted here, but if we also have no understanding of the other associated equipment, then listening impressions are also worthless. When both data and listening impression both are not sufficient, then this thead is basically becomes a talk show.
Soon,
I believe this thread is about diffraction and the influence of a wide radiation pattern. If we focus our interest on that, I can't see how different cables (provided they are at least decent ones) could make a difference in those respects. I would even assume that any test, where diffraction issues change with cable swapping, must be faulty from the start.
Rudolf
I believe this thread is about diffraction and the influence of a wide radiation pattern. If we focus our interest on that, I can't see how different cables (provided they are at least decent ones) could make a difference in those respects. I would even assume that any test, where diffraction issues change with cable swapping, must be faulty from the start.
Rudolf
I don't think it's an issue of swapping cables alone. Everything in the playback chain count. It's not even about whether these change diffraction or not either; It's about what one's listening impression means relative listening impressions using similar equipment in other systems. How much of our listening experience varies depends on the effects of other parts of the system is a question. So if we are able to know what the impressions of the same equipment used with different speakers, we can indirectly have a better understanding of what the ZDL will sound like in our terms listening experence.
If we just talk about diffraction issues, we have to look at various data, analysis/sims, to see how high the diffraction levels are, and in what kind of spectrum is effected.
If we just talk about diffraction issues, we have to look at various data, analysis/sims, to see how high the diffraction levels are, and in what kind of spectrum is effected.
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😀
It's DIY Rudy - eventually someone is bound to link diffraction to installing roofing material, making plastic corks, or building power supplies for cheap crappy pulse width amps. Give it some time, they might actually find a real link in there somewhere.
😉
Over his threads Joachim has given much information on his system/s.
Also he has described his listening room pretty well - along with the equipment-supports which he uses. It would be fair to say that the room is purpose built and treated and that the "off the shelf" items such as TT, arm, cartridges etc are world class and properly set-up.
One of the sad facts is that on this forum at large people who may well have at their disposal pretty good amps and digital players often use speakers (which satisfy them, but no-one else) in totally untreated rooms.....I won't mention those who use ancient mid-market TTs with suspect/badly set-up arms and cartridges and THEN make sweeping statements based on the evidence garnered from such set-ups.😉😉🙄
Having said that I must admit that my own room, though pleasant sounding, has no sound treatment though it does most definitely need attention! 🙂
I also feel that we should all declare our system in our personal profile, and even more telling both our musical preferences and our most relied upon test recordings!
Much of what I appreciate from these threads are ideas. Some of the ideas we probably have had in mind just might have gotton buried. Discussions like these that exchange ideas certain uncover them. I personally have shown data on effects that had discovered during some experiments, primarily for the purpose of showing "what can be accomplished". These are the kind of data that I don't find in books.
I am also interested in what Joachim will come up with because I have also had interest in such design aspects. Some of the drivers I have also measured and listened to from other designs and have a good feeling what the tradeoff is in using different drivers. It is for those reasons that diffraction had taken a slightly second priority for me, but I always noticed that speakers with a very small baffle from disappears more often than larger ones.
One of the interesting things in audio for me is that once I've listened to what can be accomplished, if I cannot listen to that on a daily basis, it just keeps bugging me. I'm never satisfied for more than 3 months.
Measurements are what help prioritize design efforts. Organized engineering companies are used to doing this. If you can measure the effects of various design aspects such as distortion, delayed release of stored energy, diffraction, etc. then you can focus on the more dominant aspects rather than making some guesses and trying to enter the audibility argument which have more variables than one can imagine.
Listening impressions are also important, regardless whether other peoples setup is ideal or not, if the setup is expressed well enough, most of the time we can still have an educated guess on what we might expect during listening, if we listen to various systems quite often.
I am also interested in what Joachim will come up with because I have also had interest in such design aspects. Some of the drivers I have also measured and listened to from other designs and have a good feeling what the tradeoff is in using different drivers. It is for those reasons that diffraction had taken a slightly second priority for me, but I always noticed that speakers with a very small baffle from disappears more often than larger ones.
One of the interesting things in audio for me is that once I've listened to what can be accomplished, if I cannot listen to that on a daily basis, it just keeps bugging me. I'm never satisfied for more than 3 months.
Measurements are what help prioritize design efforts. Organized engineering companies are used to doing this. If you can measure the effects of various design aspects such as distortion, delayed release of stored energy, diffraction, etc. then you can focus on the more dominant aspects rather than making some guesses and trying to enter the audibility argument which have more variables than one can imagine.
Listening impressions are also important, regardless whether other peoples setup is ideal or not, if the setup is expressed well enough, most of the time we can still have an educated guess on what we might expect during listening, if we listen to various systems quite often.
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I am asembling the woofer cabinets and will publish photos soon.
Still my invitation stands to listen at my place when all is well and done.
I am coming forward well.
Later i will publish a small drawing how it will look.
Still my invitation stands to listen at my place when all is well and done.
I am coming forward well.
Later i will publish a small drawing how it will look.
Hello,
My wood working tools have been declared Persona non grata indoors (too much dust). The table saw has wheels. The router makes more dust than the table saw. I use the drill press when no one is looking.
I use a 30 meter 3 conductor #12 AWG weather proof SO cord for power outdoors. There is minimal voltage drop.
Joachim, please tell us more about the construction of the TDL woofer and enclosure!
Will this creation be coming to Berkley California for an audition?
DT
All just for fun!
My wood working tools have been declared Persona non grata indoors (too much dust). The table saw has wheels. The router makes more dust than the table saw. I use the drill press when no one is looking.
I use a 30 meter 3 conductor #12 AWG weather proof SO cord for power outdoors. There is minimal voltage drop.
Joachim, please tell us more about the construction of the TDL woofer and enclosure!
Will this creation be coming to Berkley California for an audition?
DT
All just for fun!
It´s a closed cabinet isobaric. Around 45 liter in volume, about 85cm high. There is a stiffening cross and the magnet of the inner woofer will be pressed against this cross.
I have some rubber sealant that i will put between the magnet and the cross. The down woofer will be screwd from inside to the top board and the upper woofer will be mounted from above. In between is a venting hole so that the woofers are pneumatically coupled. Back in the early 80th i have build my last isobaic and i foud that the volume between the woofers can cause some trouble. I found the less volume the better so i may put some suspended styrofoam between the woofers or something else. Maybe some damping material is enough. I have to find out. Putting the woffers vertically has a disadvantage because of gravitation but the woofers have a rather stiff suspension and the trapped air in the closed cabinet may help too.
This is not a commercial product so it is unlikely that it will make it to Berkeley. Shipping is rather expensive and i have to make a packaging.
Anyway, it is not that expensive to build and i may build one while i am there.
I have some rubber sealant that i will put between the magnet and the cross. The down woofer will be screwd from inside to the top board and the upper woofer will be mounted from above. In between is a venting hole so that the woofers are pneumatically coupled. Back in the early 80th i have build my last isobaic and i foud that the volume between the woofers can cause some trouble. I found the less volume the better so i may put some suspended styrofoam between the woofers or something else. Maybe some damping material is enough. I have to find out. Putting the woffers vertically has a disadvantage because of gravitation but the woofers have a rather stiff suspension and the trapped air in the closed cabinet may help too.
This is not a commercial product so it is unlikely that it will make it to Berkeley. Shipping is rather expensive and i have to make a packaging.
Anyway, it is not that expensive to build and i may build one while i am there.
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