I'm thinking about building a pair of full range Jordan JX92S's. I'm wondering if anyone has experience with this particular build?
http://diyaudioprojects.com/Speakers/Jordan-JX92S-Bass-Reflex/
Seems like this cabinet produces great full range response. Certainly 35hz is pretty low for a FR driver set-up.
Thank you for your comments.
-David
http://diyaudioprojects.com/Speakers/Jordan-JX92S-Bass-Reflex/
Seems like this cabinet produces great full range response. Certainly 35hz is pretty low for a FR driver set-up.
Thank you for your comments.
-David
Well yes, I have experience with these as I built them.
They have been a real show stopper for me since completion. I have not had the urge to build anything else since finishing these. That says something to me. I doubt they go that low to be honest, but in my small (9' x 12') room the bass has a real snap and thump to it. Highs are nice and rounded to my ears. They were a crowd favorite at a local audio get together this summer as well.
I'm not good with reviews and words, but feel free to ask anything you may have questions on.
They have been a real show stopper for me since completion. I have not had the urge to build anything else since finishing these. That says something to me. I doubt they go that low to be honest, but in my small (9' x 12') room the bass has a real snap and thump to it. Highs are nice and rounded to my ears. They were a crowd favorite at a local audio get together this summer as well.
I'm not good with reviews and words, but feel free to ask anything you may have questions on.
Those are tall enuff that they would be ML-TLs, WinISD isn't going to be able to accurately model them. Those same cosmetics could eaasily be used on a GM 31" ML-TL.
dave
dave
Thanks guys for the help.
Gary, have you combined these speakers with a sub? My room is 12'x17' in size, so pretty similar.
Where are you located in MN? I'm originally from Duluth.
-David
Gary, have you combined these speakers with a sub? My room is 12'x17' in size, so pretty similar.
Where are you located in MN? I'm originally from Duluth.
-David
I'm in St Paul.
I have not used a sub yet. I picked up an old M&K sealed sub, but the driver needs some work. As a good friend said to me the last time he listened, "a sub will be an experiment in this room." They really do bass well, the best I've heard from a fullranger.
The drivers in them now have the EnABL treatment. Not a big difference in sound from the stock drivers, but a tad different sound.
I have not used a sub yet. I picked up an old M&K sealed sub, but the driver needs some work. As a good friend said to me the last time he listened, "a sub will be an experiment in this room." They really do bass well, the best I've heard from a fullranger.
The drivers in them now have the EnABL treatment. Not a big difference in sound from the stock drivers, but a tad different sound.
Gary, How did you arrive at the cabinet dimensions? Did you experiment with different size boxes, sim, or listen to other designs? Your wood work is impressive - very attractive choices on veneer and finish.
Dave, From your experience (which is considerable) is this a good cabinet dimension? Are there other sizes to consider?
Thank you!
-David
Dave, From your experience (which is considerable) is this a good cabinet dimension? Are there other sizes to consider?
Thank you!
-David
Hi David
I built something very similar to these:
http://diyaudioprojects.com/Speakers/Tobler-ONE/
I used a bottom firing port, and a slightly smaller cross section. I have been listening to them for about 6 months and I am very pleased. I am waiting for Dave to draw up plans for the half-jimi chang. Scott has designed the half-jimi, and Dave is going to draw the plans for me. I will email him today to see if he has had time.
JimS
I built something very similar to these:
http://diyaudioprojects.com/Speakers/Tobler-ONE/
I used a bottom firing port, and a slightly smaller cross section. I have been listening to them for about 6 months and I am very pleased. I am waiting for Dave to draw up plans for the half-jimi chang. Scott has designed the half-jimi, and Dave is going to draw the plans for me. I will email him today to see if he has had time.
JimS
jims said:
Hey Jim.
I'll be watching for you're thoughts on the half-jimi as I have a pair of Jordans looking for a cabinet design.
That is a nice looking bass reflex implementation with the JX92S. Over the years I enjoyed all of my Jordan designs (mini-monitor and MLTL variants).
The looks of the bass reflex is akin to both of Greg Monfort's (GM) 48 and 31 inch MLTL designs. These designs are mentioned on the Jordan website and have been discussed here on the DIYAudio.com site. Several people have successfully built this design and have reported excellent results. These MLTL versions are straight transmission lines so implementation is similar to the bass reflex version except stuffing is used around the driver.
Furthermore, the MLTL design accounts for the distance between the driver and port inherent within the tower. Most bass reflex box design software programs do not account for the height of the tower. You'll need baffle step comp with the MLTK implementation unless you use the speaker against the wall.
I have a Jordan JX92S with a ribbon design that uses Greg's basic 48" MLTL but adds an Aurum Cantus G2si ribbon tweeter to take the design to a new level. With the 48 inches MLTL you can achieve low end F3 performance in the mid 30 Hzs area. Again you can search for the DIYAudio.com threads that cover details about this with ribbon design.
Jim
The looks of the bass reflex is akin to both of Greg Monfort's (GM) 48 and 31 inch MLTL designs. These designs are mentioned on the Jordan website and have been discussed here on the DIYAudio.com site. Several people have successfully built this design and have reported excellent results. These MLTL versions are straight transmission lines so implementation is similar to the bass reflex version except stuffing is used around the driver.
Furthermore, the MLTL design accounts for the distance between the driver and port inherent within the tower. Most bass reflex box design software programs do not account for the height of the tower. You'll need baffle step comp with the MLTK implementation unless you use the speaker against the wall.
I have a Jordan JX92S with a ribbon design that uses Greg's basic 48" MLTL but adds an Aurum Cantus G2si ribbon tweeter to take the design to a new level. With the 48 inches MLTL you can achieve low end F3 performance in the mid 30 Hzs area. Again you can search for the DIYAudio.com threads that cover details about this with ribbon design.
Jim
Jim, Thank you. This was incredibly helpful and informative. Thank you also for the research pointers and sharing your experiences - really appreciated.
-David
-David
Hi guys,
WinISD is a good free tool, emphasis on free! 🙂 It really is a shame that commercial abuse has resulted in Martin's worksheets being pulled. WinISD does not consider damping and I don't think it considers the phase of the port and driver. So you do not see the effects when they are out of phase. Of course you will want to damp the box to your personal taste to address this.
Out of curiosity, what are people using for T-Line sims now?
Cheers
WinISD is a good free tool, emphasis on free! 🙂 It really is a shame that commercial abuse has resulted in Martin's worksheets being pulled. WinISD does not consider damping and I don't think it considers the phase of the port and driver. So you do not see the effects when they are out of phase. Of course you will want to damp the box to your personal taste to address this.
Out of curiosity, what are people using for T-Line sims now?
Cheers
Hi Gio, that's what I was wondering. I don't want to cause further aggravation.
But if Martin gave his blessing to a very limited, very simple web-based tool at some point, I would be willing to code it. E.g., something akin to the alignment tables, maybe with another variable or two. Something non-infringing and thoroughly simple (compared to his models / formulas).
Anyway, it looks like the poor guy got burned out helping lots of people, and I'm not sure he got the proper gratitude. At the very least, he said he did not have enough time for his own projects, so I hesitate to even bother him by asking. Let's bother him in six months! 🙂
But if Martin gave his blessing to a very limited, very simple web-based tool at some point, I would be willing to code it. E.g., something akin to the alignment tables, maybe with another variable or two. Something non-infringing and thoroughly simple (compared to his models / formulas).
Anyway, it looks like the poor guy got burned out helping lots of people, and I'm not sure he got the proper gratitude. At the very least, he said he did not have enough time for his own projects, so I hesitate to even bother him by asking. Let's bother him in six months! 🙂
gmilitano said:
Like most vented box programs, WinISD is strictly a Helmholtz resonator program, i.e it assumes a ~uniform particle density that's only found in golden or acoustic ratio cabs with no consideration for any of the variables of a MLTL, etc.. Better than nothing, but not by much.
A shame indeed! The few always ruin it for the many. 🙁
Hornresp for basic un-damped response, though with apparently infinitely ideal assumptions, so not very accurate once above the driver's mass corner. For more advanced sims, even more so than MJK's due to the amount of inputting flexibility, Akabak is where it's at, but the learning curve is steep, though I have it on good authority that for all its flexibility, accuracy that it too falls back on ideal situations that generally don't exist in typical speaker building reality, so tends to be somewhat optimistic also.
GM
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