Hi
I have a Iwatahorn 300 with a Radian 950 PB driver and i am looking for the best audioquality for the mid-/bass and bass frequencies. i think that Onken or VOT would go perefectly with The Iwata's but it is very difficult to find some old Altecs 416A or 515 in good quality. I would like to know which other drivers you would suggest for Onken or VOT?
Thanks a lot for answering😀
Souldriver
I have a Iwatahorn 300 with a Radian 950 PB driver and i am looking for the best audioquality for the mid-/bass and bass frequencies. i think that Onken or VOT would go perefectly with The Iwata's but it is very difficult to find some old Altecs 416A or 515 in good quality. I would like to know which other drivers you would suggest for Onken or VOT?
Thanks a lot for answering😀
Souldriver
Great Plains Audio makes 515 series drivers that are highly suitable, as did Iconic (165 series).
There are also a number of drivers from Eminence that have reasonable TS parameters for these sorts of alignments. I believe that B&C may also have several suitable models, but have not checked recently.
There are also a number of drivers from Eminence that have reasonable TS parameters for these sorts of alignments. I believe that B&C may also have several suitable models, but have not checked recently.
Plus GP's 411, 414, 416, 421 series if they can still assemble per original specs listed here: Thiele/Small Parameters for Altec LF Loudspeakers
Regardless, one can use WinISD Pro or similar to check drivers to see if they are suitable by selecting a Qb3 alignment with [6-8] vents totaling [0.75-1.0x] driver area [Sd] that don't exceed ~35 cm long.
GM
Regardless, one can use WinISD Pro or similar to check drivers to see if they are suitable by selecting a Qb3 alignment with [6-8] vents totaling [0.75-1.0x] driver area [Sd] that don't exceed ~35 cm long.
GM
Ditto what Kevin and Greg said. You can use a box simulator to "try before you buy" be using the parameters listed above. You can think of the original Onken as a 340L bass reflex tuned to 39Hz.
The nice thing about the 416 was its high efficiency and low Fs. If you don't get a modern 416, then look for something like it. Most pro 15s have a higher Fs than the Altec.
The nice thing about the 416 was its high efficiency and low Fs. If you don't get a modern 416, then look for something like it. Most pro 15s have a higher Fs than the Altec.
Thanks a lot for your advise. i will give try to check out these thiele /small parameters with some other speakers. i think it is quit difficult (after reading some treads about the Onken) to find other speakers then Altecs or GPA's. Yes, the Supravox could be a possibility but somebody wrote that the 285 does not go below 50hz which is not enough for me. on the other hand i will have a closer look to open baffles design. i guess with 4 18' Dipoles i could get some nice performance as well. il keep you informed. any further adises will be veeery welcome. thanks again!
Did you see this system?
http://www.diyaudio.com/forums/multi-way/99441-hemp-coaxial-9.html#post2651136
http://www.diyaudio.com/forums/multi-way/99441-hemp-coaxial-9.html#post2651136
Hmm, a 200 L cab can't be an Onken due to excessive vent length, at least not without stuffing the vents to make them ~aperiodic, nulling out the performance part of the Onken's allure.
I'd forgotten that Unibox could do multiple vents/adjustable end correction, so plugging published specs into an Onken calculator for a n = 6.34 alignment:
482.1 net Vb
F3/Fb = ~31.46/30.9 Hz
modest vent area [Av] reduction to 752.64 cm^2 = 29.35 cm long vents whereas Unibox = 29.45 cm [plenty close enough] when the proper 1.728 end correction is used and WinISD Pro = 40.78 cm since it doesn't allow this high an end correction.
GM
I'd forgotten that Unibox could do multiple vents/adjustable end correction, so plugging published specs into an Onken calculator for a n = 6.34 alignment:
482.1 net Vb
F3/Fb = ~31.46/30.9 Hz
modest vent area [Av] reduction to 752.64 cm^2 = 29.35 cm long vents whereas Unibox = 29.45 cm [plenty close enough] when the proper 1.728 end correction is used and WinISD Pro = 40.78 cm since it doesn't allow this high an end correction.
GM
interesting....ive been thinking about a Svent = Sd type reflex old style thing for a while.....perhaps even a simple port reflex....
Good luck!
Good luck!
hi in my long research for alternative driver for 340l onken box i have found that the peveavy 1508 is the best fit. I do not know anything about sound quality though.
regards
regards
Interesting, the published specs must be pretty far off since only the 'HE' variant had [barely] short enough vents to qualify as an 'Onken'.
GM
GM
I´d say HE is unsuitable giving you a F3 of almost 60Hz when strictly following the Onkens design formulas.
True, but its high F3, Fb has nothing to do with whether or not it's suitable for an Onken alignment, that's a user's choice 😉 and a good one if a sub system is planned.
GM
GM
Can you help some on the end correction factor? Unibox allows it, but I don't know much about it, other than the canned factors it comes with.
E.G., how did you arrive at 1.728 for the Onken vents? I was using 0.723 (one flush end)
P.S. Looks like I was wrong about the 200L box. 240L, maybe.
FOR ONKEN 360 EMSPEAKER B15EX
Hello,
I builded ONKEN 360 cabinets with EMSPEAKER B15 EX, french speaker.
This speaker have an independante excitation. It's possible to adjust the parameters of the speaker to the cabinet.
The B15 EX for me is better than the SUPRAVOX and the ALTEC speakers.
But this price is very expensive : 3300 € for two
Hello,
I builded ONKEN 360 cabinets with EMSPEAKER B15 EX, french speaker.
This speaker have an independante excitation. It's possible to adjust the parameters of the speaker to the cabinet.
The B15 EX for me is better than the SUPRAVOX and the ALTEC speakers.
But this price is very expensive : 3300 € for two
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