i have bought a pair of sb15nbac-8 and are burning them in right now in a 10L closed box. i tried them as a replacement for rs225 woofer (working with SS 10f) , just for fun, and they are very transparent for better or worse. bass is very tight, but with depth in accordance to it's size. no sign of harshness or metallic sound at all up to now, which is not surprising because the cone looks more like «metal paper» to me than a solid bell. For instance, voices are very detailed like i rarely heard. I am curious how it would compare to the satori. probably the satori would be slightly less resolving, especially in the bass region, but overall may be more pleasing.... remains to be seen.
one thing i noted: the driver has average venting. the legs that join the cone to the motor are not optimised for airflow, compared to other high end drivers. so i tried to put tape around and over some «sharp» edges i encountered inside the driver, and it seems to give better low end, and a little more of it, because of the better airflow. also rounding the inside of the baffle around the driver did the same effect... very interesting. I don't know if everyone would notice the difference, because i have a very good bass reproduction, specifically, from my upstream gear.... but it's something anyone can try out.
one thing i noted: the driver has average venting. the legs that join the cone to the motor are not optimised for airflow, compared to other high end drivers. so i tried to put tape around and over some «sharp» edges i encountered inside the driver, and it seems to give better low end, and a little more of it, because of the better airflow. also rounding the inside of the baffle around the driver did the same effect... very interesting. I don't know if everyone would notice the difference, because i have a very good bass reproduction, specifically, from my upstream gear.... but it's something anyone can try out.
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Nice to hear your feedback!
I am waiting for some new drivers, I will go for a 3way with satori midrange(mr130) , still I am not sure how better the voices and the midrange can be.
I am waiting for some new drivers, I will go for a 3way with satori midrange(mr130) , still I am not sure how better the voices and the midrange can be.
i am not really sure what you mean, but the spokes of the driver basket should not cause any airflow problems as is, but a very thick baffle and no chamfering to it will cause problems, especially so with drivers with large magnets
Chances are it will sound different. less detailed because of cap in series, but likely better tone and separation. I would burn in the mr13p a bit in fullrange mode before final verdict, personnally. it helped a bunch with my SS 10F
celef,
per my subjective test, and i think it makes some sense, any sharp edge in the driver basket area will hinder cone movement, and become sound emitters, to a degree of course.
If you look at higher end drivers, the «spokes» are generally rounder and well spaced, i think not fortuitously.
Don't take it as money...only my observation.
per my subjective test, and i think it makes some sense, any sharp edge in the driver basket area will hinder cone movement, and become sound emitters, to a degree of course.
If you look at higher end drivers, the «spokes» are generally rounder and well spaced, i think not fortuitously.
Don't take it as money...only my observation.
More detailed is the feedback that I have from many people, different voicing because of the different cone material. I think that it is a matter of taste.
I'd be interested to hear the comparison between satori and it's «lower» grade sibling. 🙂
In my case, i would go more, in the near future, with the vifa ne180w as midwoofer.... half the price vs satori over here.
In my case, i would go more, in the near future, with the vifa ne180w as midwoofer.... half the price vs satori over here.
i can not see how this basket would hinder cone movement to any degree, yes it could if there where more spokes then openness, then air would need to be squeezed between the spokes, but this is not the case here
yes, but this does not mean that the spokes are badly shaped in this driver [/QUOTE]
celef,
maybe i made not myself clear 🙂
i only said the venting was average, not poor or inadequate. But at the same time, maybe it has benefits like limiting excursion or other sonic or cost condiserations.
It is only after i «modified» the spokes and the part that holds the spider in place, for lesser sharp edges, that i thought maybe it was not optimised, some some reasons, like i said.
It is not specifically poor, but from observation, the satori range and many Seas, as well as SS revelator/illuminator series have a more «aerodynamic» profile.
i don,t say what i hear is game changing. but i can hear the difference: deeper lower end, more of it and better quality for the bass and lower midrange.
It only makes sense when you think about it. The question is how significant to you it is, i think.
In my case, i have a well regulated amp PSU (sigma22), and a DAC with decent bass that helps bring up the difference. also, i should add, the sb15nbac has very good bass clarity, despite it's distortion
maybe i made not myself clear 🙂
i only said the venting was average, not poor or inadequate. But at the same time, maybe it has benefits like limiting excursion or other sonic or cost condiserations.
It is only after i «modified» the spokes and the part that holds the spider in place, for lesser sharp edges, that i thought maybe it was not optimised, some some reasons, like i said.
It is not specifically poor, but from observation, the satori range and many Seas, as well as SS revelator/illuminator series have a more «aerodynamic» profile.
i don,t say what i hear is game changing. but i can hear the difference: deeper lower end, more of it and better quality for the bass and lower midrange.
It only makes sense when you think about it. The question is how significant to you it is, i think.
In my case, i have a well regulated amp PSU (sigma22), and a DAC with decent bass that helps bring up the difference. also, i should add, the sb15nbac has very good bass clarity, despite it's distortion
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no AB testing, just my ears, for now at least. It is not obvious but noticeable. also, like i said, my system is «dialed» to notice a difference. it think it would be more obvious with a lesser unit, like the sb13pfc midwoofer, after and before mod. the mod being putting tape around the spoke, for now.
But it would be easy to AB with two speakers.
in any case, if you can,t hear the difference with or without inside baffle roundoff, i say don't bother, unless you have something like sb13pfc...
One thing one can do also, is instead of rounding of, is clustering with more material to only let a little bit of air passed, to accentuate the phenomena.
SS revelator 28w/4878t00 vs SB sb13pfc
But it would be easy to AB with two speakers.
in any case, if you can,t hear the difference with or without inside baffle roundoff, i say don't bother, unless you have something like sb13pfc...
One thing one can do also, is instead of rounding of, is clustering with more material to only let a little bit of air passed, to accentuate the phenomena.
SS revelator 28w/4878t00 vs SB sb13pfc
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So let me understand this. You did not perform a real time conventional AB comparison test with frequent switching back and forth between the two items.
Instead you listened to these drivers before you rounded off the edges of frame. And then you listened to them again sometime later after you rounded off the edges.
And you could remember the first sound so well that you could identify very small subtleties in the sound from the first time to the last, particularly in the bass.
Instead you listened to these drivers before you rounded off the edges of frame. And then you listened to them again sometime later after you rounded off the edges.
And you could remember the first sound so well that you could identify very small subtleties in the sound from the first time to the last, particularly in the bass.
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it think i made myself clear that this was not scientific in the traditional sense.
but if you consider my brain a computer, yes it compared and remembered two situations. nothing extraordinary in that, IMO.
also, A and B testing uses your senses too, it just makes it easier to compare.
When you go buy a set of speakers at the store, you don't compared datasheets and measurements to make your final decision. Same as with audio shows.
if you can wrap a piece of plastic or non-magnetic metal around the back of your driver spokes or glue a sharp edge to the inside of your baffle, and tell me you can't hear any difference.
i didn't say it was obvious, just noticeable to ME.
I'm not urging to take my word for it...just food for thought to share. maybe i will measure later, but for now i don't have the time.
please feel free to comment and be to skeptical 🙂
but if you consider my brain a computer, yes it compared and remembered two situations. nothing extraordinary in that, IMO.
also, A and B testing uses your senses too, it just makes it easier to compare.
When you go buy a set of speakers at the store, you don't compared datasheets and measurements to make your final decision. Same as with audio shows.
if you can wrap a piece of plastic or non-magnetic metal around the back of your driver spokes or glue a sharp edge to the inside of your baffle, and tell me you can't hear any difference.
i didn't say it was obvious, just noticeable to ME.
I'm not urging to take my word for it...just food for thought to share. maybe i will measure later, but for now i don't have the time.
please feel free to comment and be to skeptical 🙂
Well, I am very skeptical. This might be just a matter of confirmation bias like so many opinions are here.
But moreover, and as celef has opined as well, there is no scientific reason to believe that the edge sharpness of the spokes could in any way affect the sound. And that's particularly true at bass frequencies where the wavelengths are so large that the spoke edges are completely inconsequential.
But moreover, and as celef has opined as well, there is no scientific reason to believe that the edge sharpness of the spokes could in any way affect the sound. And that's particularly true at bass frequencies where the wavelengths are so large that the spoke edges are completely inconsequential.
Firt of all, I am not from France, although i speak french (though i would probably fail a french test in France based on my usage of this language 🙂 ).
Secondly, that is an interesting subject of discussion (i am ready to discuss in PM), though most experiences with americans i have, i would say, is quite friendly. 🙂
Thirdly, back to (off) topic , i would say maybe turbulence is a scientific reason to explain what i hear as different. like i said, it's OK to be skeptical, because maybe i am hallucinating also (could be a possibility).
Secondly, that is an interesting subject of discussion (i am ready to discuss in PM), though most experiences with americans i have, i would say, is quite friendly. 🙂
Thirdly, back to (off) topic , i would say maybe turbulence is a scientific reason to explain what i hear as different. like i said, it's OK to be skeptical, because maybe i am hallucinating also (could be a possibility).
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You are mixing up two entirely different things. The reason that sometimes the edge of a port tube has a radius is to eliminate port chuffing. This is not an improvement to the bass response itself, but rather just a means to get rid of some annoying, extraneous noise.
However, that is no similar issue with the frame supports in a dynamic driver. I can see no basis for your claim that rounding the edges of the frame supports can create a “deeper lower end, more of it and better quality for the bass and lower midrange”.
However, that is no similar issue with the frame supports in a dynamic driver. I can see no basis for your claim that rounding the edges of the frame supports can create a “deeper lower end, more of it and better quality for the bass and lower midrange”.