hey 007 - a deluxe home for 12LTA - a 0.7 scale VOT - I'd love to have this size VOT as it would be close to the size of the Karlson K15
that's 1pi ~1 watt for the sim
that's 1pi ~1 watt for the sim
An externally hosted image should be here but it was not working when we last tested it.
Kappa12 would sim better than 12lta - there may need to be a bit of fudging vs strict 0.7 scale to get things to fit
I don't like how the website mixes different cabinets with various drivers. A lot of the drivers have unusably high Qts's for vented alignments, or in some cases even for sealed.
John
hi planet10 - are you referring to the cavity peak which can occur around 200Hz in that size Karlson? - its not too bad (my standards - probably not yours) in a K12 with a pym1298. It can be a problem if the peak is strong and there's not much power below as can happen sometimes when using say a strong motor 8 in a "K10 size"
I do wonder if a scaled VOT as above would have similar characteristics to an A7. I've only heard one of those close to 40 years ago - loud - dull top end (beamy horn with poor power response in the top octave)
I do wonder if a scaled VOT as above would have similar characteristics to an A7. I've only heard one of those close to 40 years ago - loud - dull top end (beamy horn with poor power response in the top octave)
@ freddi
Those are 12inch Fane full range drivers in a 7 cubic ft box tuned to 50hz. I used 3/4 exterior ply with a 2x3 brace front to back just below the driver. Lined 5 sides with 3.5 inch Bonded Logic house insulation. They play quite loud even using a el84 single ended amp. Oh and no need for a tweeter, everyone that's listened to them has been impressed with their top end.
Larry
Those are 12inch Fane full range drivers in a 7 cubic ft box tuned to 50hz. I used 3/4 exterior ply with a 2x3 brace front to back just below the driver. Lined 5 sides with 3.5 inch Bonded Logic house insulation. They play quite loud even using a el84 single ended amp. Oh and no need for a tweeter, everyone that's listened to them has been impressed with their top end.
Larry
Scaling a VOT as a whole isn't a good plan, you want to scale the horn based on its upper mass corner, which is ~200 Hz for 825/828 cab Vs the intended driver's, then calculate the rear cab tuning per the driver's specs.
GM
true - the 0.7 VOT scaled rear chamber is ~123 liters so a bit large for some 12" speakers. In this exercise, I'd like to keep overall enclosure depth to no more than 18". I have a 12pe32 but pym1298/Kappa12a might be more suitable for the reflex section.
Nice larry.
After having 3.2ft3 sealed, I've been curious about the sound of the fane in around double that, or 7ft3 tuned to 40-50hz.
After having 3.2ft3 sealed, I've been curious about the sound of the fane in around double that, or 7ft3 tuned to 40-50hz.
![Fane 12-250TC 38 Hz MLTL [223 L_7.875 ft^3].PNG](/community/data/attachments/573/573318-8b602dcc131fcf5385ad361ef9b259fb.jpg?hash=i2AtzBMfz1)
Norm - if you still have a 2-15 cabinet and some wood to cover one driver opening, and make a 15" to 12" speaker adatper, you could try your Fane in that box. That's a real nice sim GM and should be perfect for the 12" FR goal.
Hey GM - I don't know how to import a .txt into hornresp so typed it - didn't figure out the fill -
did I botch it?
Hey GM - I don't know how to import a .txt into hornresp so typed it - didn't figure out the fill -
did I botch it?
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No, though note that while HR sims the vent at the bottom, the response plot, etc., is modified in the basic program to be acoustically located at ~4/5ths down from the top [L*0.84].
In the HR folder is an 'import' folder to DL to and an 'export' folder to store ones you want to post.
Once DL'ed; in HR click on 'file', 'import'---Hornresp Record and a window will open to choose from and it will auto install in a new Record.
In the LW, click on the 'filling' option and set Segment 1 & 2 @ 47.00. No clue what it really converts to re fiberglass, etc., but sim looks about like 0.2 lbs/ft^3 of fiberfil in MJK's program.
GM
In the HR folder is an 'import' folder to DL to and an 'export' folder to store ones you want to post.
Once DL'ed; in HR click on 'file', 'import'---Hornresp Record and a window will open to choose from and it will auto install in a new Record.
In the LW, click on the 'filling' option and set Segment 1 & 2 @ 47.00. No clue what it really converts to re fiberglass, etc., but sim looks about like 0.2 lbs/ft^3 of fiberfil in MJK's program.
GM
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thank you very much for all those details - imported - fill shows 0.521kg polyfill and nice graph- had a headache for a week which can't shake. Did Leonard Audio's T-line program disappear ?
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here's the Fane with 15 liter back chamber, 2nd order highpass, 200w corner 🙂 - like to see how it would sound in real life https://i.imgur.com/8QvqNI0.jpg
Ah, thanks GM, an mltl option would be great as well.
I had mentioned it earlier, but I don't think anyone answered - - Doesn't it matter how the bass frequencies from below and above the XO point match up?
For example, if both the full range and the helper woofer were in sealed enclosures and wired in phase, then I would expect that the bass at 140 hz and 160 hz (assuming 150 hz xo freq) would arrive at my ear at roughly the same time (many other things with effect neglected of course). With the mltl, BiB, and many other non-sealed designs, that bass wavefront would be arriving later than the bass from the direct radiating (and most likely sealed enclosure) woofer since it has a longer path to take.
GM alluded to it being an issue perhaps, mentioning using electronics with a "delay" feature, but I was not planning on using one. I have not actually purchased the active crossover yet, but was planning on the CX2310. Should I be re-evaluating?
I had mentioned it earlier, but I don't think anyone answered - - Doesn't it matter how the bass frequencies from below and above the XO point match up?
For example, if both the full range and the helper woofer were in sealed enclosures and wired in phase, then I would expect that the bass at 140 hz and 160 hz (assuming 150 hz xo freq) would arrive at my ear at roughly the same time (many other things with effect neglected of course). With the mltl, BiB, and many other non-sealed designs, that bass wavefront would be arriving later than the bass from the direct radiating (and most likely sealed enclosure) woofer since it has a longer path to take.
GM alluded to it being an issue perhaps, mentioning using electronics with a "delay" feature, but I was not planning on using one. I have not actually purchased the active crossover yet, but was planning on the CX2310. Should I be re-evaluating?
Larry, thanks for sharing - those are a nice size, not too big/not too small 🙂
If I was to do a bass reflex, it would probably look pretty similar.
Freddi - Another acronym I had to look up - VOT, ha! I should have known that one from prior reading. That would still be a rather large enclosure - seems like it would be much larger than the k15 still, no?
If I was to do a bass reflex, it would probably look pretty similar.
Freddi - Another acronym I had to look up - VOT, ha! I should have known that one from prior reading. That would still be a rather large enclosure - seems like it would be much larger than the k15 still, no?
You're welcome!
Well - duh! To accurately reproduce a signal it must be in correct time, phase, amplitude. Note though that due to our very poor hearing acuity down low there's lots of latitude and somebody famous [I forget now] mentioned that phase could be off in the hundreds of degrees and still sound good.
Yes, unless you plan on either mounting the sub
GM
you could make a baby Voice Of The Theater about the same dimensions as K15 depending upon the 12's motor strength - whether worth the endeavor = ?? (maybe - I'd be game lol) - GM's ~8CF MLTL for Fane's 250 TC has enough LF extension that at modest levels, you would not need any subwoofer. It would be one of your cheapest options for a truly FR single driver setup.
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