planet10 said:
Well the thought has crossed my mind a few times yes. But when it comes to building speakers, I get as much of a woody from the aesthetics portion of it all as well as the listening pleasure. I am sure I could build my own and make them look decent but when I figure in the cost of the Scan-Speaks compared to the rest of the project's budget, it really does equal a minimal amount and well worth it in the end for me.
Noidster
bipole FR125
Pete - mine have been breaking in for just over a week now, and yep, they're pretty damned fine fresh from the box.
I've currently got three pairs of bi-pole MLTL's*; BB ply & MDF for the FR125 (awaiting arrival of more drivers from Bob for the materials "shoot-out"), and BB ply for Fostex FE127E.
* since initial supplies of "field test samples" of the FR drivers was limited, we're runnig WR's on the rear of the bi-pole; by merely rotating the tower 180degrees, it's pretty apparent that the tweaking on FR design definitely worked - makes one wonder what a FR165 might be capable of.
After recent tragedies with dust-cap-ectomies the latter FE127E, (consult Dave Dlugos for potential risks therein) I've had to install a fresh quad, and start the whole break-in process all over.
FWIW, while I've never actually heard a pair of Jordans, I can heartily agree that the CSS FR/WR125 will be hard to beat. However, as was mentioned earlier in this thread not SE friendly; but currently sounding wonderful on an EL34 P/P triode ( Jolida 302)
Tim, et al: I'm most interested in any listening impressions vis a vis the FE127E in similar application. Even fresh from the box, there's something quite organic and engaging about the midrange on this Fostex sleeper. I'm torn between them and the FR/WR125 bipole.
TomZ - will you be publishing drawings of your BLH for the FR125?
Peter Menting said:
Pete - mine have been breaking in for just over a week now, and yep, they're pretty damned fine fresh from the box.
I've currently got three pairs of bi-pole MLTL's*; BB ply & MDF for the FR125 (awaiting arrival of more drivers from Bob for the materials "shoot-out"), and BB ply for Fostex FE127E.
* since initial supplies of "field test samples" of the FR drivers was limited, we're runnig WR's on the rear of the bi-pole; by merely rotating the tower 180degrees, it's pretty apparent that the tweaking on FR design definitely worked - makes one wonder what a FR165 might be capable of.
After recent tragedies with dust-cap-ectomies the latter FE127E, (consult Dave Dlugos for potential risks therein) I've had to install a fresh quad, and start the whole break-in process all over.
FWIW, while I've never actually heard a pair of Jordans, I can heartily agree that the CSS FR/WR125 will be hard to beat. However, as was mentioned earlier in this thread not SE friendly; but currently sounding wonderful on an EL34 P/P triode ( Jolida 302)
Tim, et al: I'm most interested in any listening impressions vis a vis the FE127E in similar application. Even fresh from the box, there's something quite organic and engaging about the midrange on this Fostex sleeper. I'm torn between them and the FR/WR125 bipole.
TomZ - will you be publishing drawings of your BLH for the FR125?
Just finished first two spray coats on main cabinets, the base and driver baffle are red oak so they will take a few days to complete but were gett'in close.
Even in Bi-polar the 4 Ohm load that these drivers present at maybe 89-90 db is going to suck out a lot of power from any tubeamp, especially a SET.
I was planning on EL 84 PP, but I think I'll look into KT-88's instead, i believe that 30-40 watts should make them sing!
Pete
Even in Bi-polar the 4 Ohm load that these drivers present at maybe 89-90 db is going to suck out a lot of power from any tubeamp, especially a SET.
I was planning on EL 84 PP, but I think I'll look into KT-88's instead, i believe that 30-40 watts should make them sing!
Pete
it's just not about the watts
Pete, if you've got access to a working PP EL84, you might want to try that first before dedicating yourself to a higher power, possibly more complex amp than these babies really need.
For example, I borrowed an AudioNote OTO PP integrated from a local dealer the other day, just to prove the point: 12Watts EL84 (Sovteks), EI ECC83 input & phase/splitter drivers - nothing revolutionary about the circuit I don't think. Nice enough sounding amp, but I'd dare say could be equaled or excelled for a fraction of the price DIY.
Plenty of power for my listening needs, and I'm not sure the compatibilty issue is a matter of efficiency; the first pair of speakers I built about 5 years ago ( Vifa P13/D45 TL) are around the same efficiency level; even with crossovers they play fine at the same volume level on my EL84 monoblocks * that causes the amps conniption fits with the FR125 monopoles at 8ohms or the bipoles at either 4 or 16.
*(RH connected SE pentode/parallel feed output / EF86 triode driver)
There's something else going on there, but I'm not yet sure what.
Peter Menting said:
Pete, if you've got access to a working PP EL84, you might want to try that first before dedicating yourself to a higher power, possibly more complex amp than these babies really need.
For example, I borrowed an AudioNote OTO PP integrated from a local dealer the other day, just to prove the point: 12Watts EL84 (Sovteks), EI ECC83 input & phase/splitter drivers - nothing revolutionary about the circuit I don't think. Nice enough sounding amp, but I'd dare say could be equaled or excelled for a fraction of the price DIY.
Plenty of power for my listening needs, and I'm not sure the compatibilty issue is a matter of efficiency; the first pair of speakers I built about 5 years ago ( Vifa P13/D45 TL) are around the same efficiency level; even with crossovers they play fine at the same volume level on my EL84 monoblocks * that causes the amps conniption fits with the FR125 monopoles at 8ohms or the bipoles at either 4 or 16.
*(RH connected SE pentode/parallel feed output / EF86 triode driver)
There's something else going on there, but I'm not yet sure what.
Member
Joined 2002
I have gotten quite a few requests for the miniOnken plans so i tarted them up a bit and have posted them. I'm calling this version 0.9 just to cover my butt, but we are pretty happy with them.
http://www.planet10-hifi.com/boxes.html
dave
http://www.planet10-hifi.com/boxes.html
dave
Member
Joined 2002
Since i have been staring at these plans dave for the ribbon and the full range in a book shelf type box, and 2 enclosures with the extremmis driver's for sub's.. Would it be a good idea to go ported for now then when i get the subs built later on i could stuff the boxes OR get new ones made ?
Whats your idea..?
Remember i have 2 stereo amps with mini a's in them with 15 Watts of power and my blue amps class AB of 100watts for the extremmis driver's..
j'
Whats your idea..?
Remember i have 2 stereo amps with mini a's in them with 15 Watts of power and my blue amps class AB of 100watts for the extremmis driver's..
j'
jleaman said:
That works... we just had a practical example with your 8" sub. Pick a sealed box size that is approprite for the end application and then add an appropriatly tuned port.
I will be drawing up "normally ported variations of the miniOnken which would be just about right and easier to stuff the port than the miniO.
dave
Member
Joined 2002
Pictured is my zHorn back horn design employing the CSS FR125S.
To my ears this driver does well in a small back loaded horn. There is little in the way of a midbass hump created, oh, maybe a single dB around 100Hz. The bass starts to roll off below 60Hz, but has some presence down to about 40 some, with another drop off below this.
I am really liking this driver more and more. The midrange is opening up. Besides dynamic nuanaces that convey swing and the performer's emotional intention, this driver has an upper range harmonic integrety. I hear when another musician takes over a melodic line from another.
To my ears this driver does well in a small back loaded horn. There is little in the way of a midbass hump created, oh, maybe a single dB around 100Hz. The bass starts to roll off below 60Hz, but has some presence down to about 40 some, with another drop off below this.
I am really liking this driver more and more. The midrange is opening up. Besides dynamic nuanaces that convey swing and the performer's emotional intention, this driver has an upper range harmonic integrety. I hear when another musician takes over a melodic line from another.
Attachments
Here is a picture of the inside.
Now that they are together, I'll have to play around with the chamber behind the driver, i.e. wall damping. Presently, I've employed a 1/2 inch thick piece of wool felt on the wall opposite the driver.
About the design: thinking it is not a highly damped driver, with highish QTs, maybe a larger chamber behind the driver would be best.
This is a narrow design baffle that fits into my nearly reorganized room with about 5 feet behind the cabinet, thus midroom. I'd next like to make a wide baffled, say 12 inch wide, back loaded horn. I like a wide baffle because it creats a larger stage image, seems more efficient (with more sound energy directed toward the listener) and easier room placement (room effects are minimalized).
About the CSS FR125S driver: no desire, in the least, to move it from my main system.
Now that they are together, I'll have to play around with the chamber behind the driver, i.e. wall damping. Presently, I've employed a 1/2 inch thick piece of wool felt on the wall opposite the driver.
About the design: thinking it is not a highly damped driver, with highish QTs, maybe a larger chamber behind the driver would be best.
This is a narrow design baffle that fits into my nearly reorganized room with about 5 feet behind the cabinet, thus midroom. I'd next like to make a wide baffled, say 12 inch wide, back loaded horn. I like a wide baffle because it creats a larger stage image, seems more efficient (with more sound energy directed toward the listener) and easier room placement (room effects are minimalized).
About the CSS FR125S driver: no desire, in the least, to move it from my main system.
Attachments
The strike is still going.
http://story.vancouverstar.com/p.x/ct/9/cid/535f27099a41ff22/id/33c79efa98507470/
http://story.vancouverstar.com/p.x/ct/9/cid/535f27099a41ff22/id/33c79efa98507470/
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