Hi, i am looking for a design that can work on this speaker. I think maybe could work the tham15 or the ML-transflex . The manual come whit a design of a turbo box but I don’t know how to simulate in hornresp for know how is the response. What i really want is achieve 125db in 45-100 Hz. I load images of the sub and the turbo box. I appreciate any answer. Thanks.
CAR
T/S
Power 600W
Z dual 4Ohms
Revc=dual 3.5 Ohms
Levc=7.12(8Ohms)-1.76(2Ohms)
Fs=53.4 Hs
Qms=20.16
Qes=0.65
Qts=0.63
Vas=41.36 Lts
Rms=3.65 NS/m
Mms=219gr
Cms=4x10-5 m/N
Diameter=329mm
BL=28.3(8Ohm)-14.2(2Ohm) T.m
Xmax=6.6mm
manual
CAR
T/S
Power 600W
Z dual 4Ohms
Revc=dual 3.5 Ohms
Levc=7.12(8Ohms)-1.76(2Ohms)
Fs=53.4 Hs
Qms=20.16
Qes=0.65
Qts=0.63
Vas=41.36 Lts
Rms=3.65 NS/m
Mms=219gr
Cms=4x10-5 m/N
Diameter=329mm
BL=28.3(8Ohm)-14.2(2Ohm) T.m
Xmax=6.6mm
manual
Attachments
HornResp tells me thusly:
Summary - you could get it to 125dB in that frequency range, but you'll have to apply a steep filter below 40 Hz.
JAG's likely going to chime in concerning that large Le value and its possible impact on the accuracy of the HornResp sims... 🙂
Summary - you could get it to 125dB in that frequency range, but you'll have to apply a steep filter below 40 Hz.
JAG's likely going to chime in concerning that large Le value and its possible impact on the accuracy of the HornResp sims... 🙂
Attachments
No I don't think so, not for a 12 inch driver with 6.6 mm xmax. Lossy inductance won't like be much of an issue, if at all. High Le alone doesn't seem to cause losses, just a droopy top end. But when you get into massive coils and motors and ultra high excursion you start to see real motor strength losses.
Hi Brian , Thanks a lot for you reply . I have seen errors on my post , the diameter of the speaker is 38cm because is an 15” and the manual that I put there in the link is the 12” version . Sorry for that. You know how to simulate that Turbo box that come in the manual ? I suppose is a 4th order Bandpass , that is ok?. Iam thinking that for the tham the xmax of 6.6 is not enough😕
Doesn't matter - I used the parameters you provided and assumed a typical Sd for a 15" driver for the HornResp sim.
I wouldn't worry about the 6.6 Xmax - that's going to be the limiting feature for any subwoofer alignment you come up with for this driver.
Concerning the "Turbo box" design, it looks more like a slot-loaded sealed box. If you can tell me the volumes of the rear and front sections, I'll see if I can work out a HornResp sim for it. However I suspect it may not meet your output and frequency extension requirements.
Hi, i found the volumes, in the sealed are 17 lts and the rear is 106lts. The port length is 44cm x 6.5cm. So yo think that the tham15 is a good design for this driver? i am concerned about exceed the xmax and damage the speaker.Thanks for you reply again
If you don't mind me saying
Crivero ,
I didn't go over your sim or sketch yet in detail but a series tuned 6th order cabinet can be a really solid solution for some drivers ....
Your sketch reminds me just a little of the ML-TP (ML-Translfex) for the LAB15-4 , and the type of ducting reminds me just a little of the KARLFLEX (both designs are Series Tuned 6th Order types ...... A Tapped Horn is also in this same category)
Considering a bunch of factors such as the high Fs figure (free-air resonance) of the driver , and it's fairly small VAS figure for a 15 (it is a lower compliance type driver , which is not a bad thing necessarily) , along with it's limited Xmax rating i would not tune it too low ......
Your 40hz Fb (tuning) as shown in your design and Brian's is about as low as i would go with it...🙂
Higher tunings would of course allow for higher output and higher power handling but really starts to take away from many modern musical styles so you should try to figure out just how low your music really goes ...
If it turns out that your music only goes down to 50hz or 45hz then that is great!
Tune your cabinet to that frequency and enjoy the increased performance 
Crivero ,
I didn't go over your sim or sketch yet in detail but a series tuned 6th order cabinet can be a really solid solution for some drivers ....
Your sketch reminds me just a little of the ML-TP (ML-Translfex) for the LAB15-4 , and the type of ducting reminds me just a little of the KARLFLEX (both designs are Series Tuned 6th Order types ...... A Tapped Horn is also in this same category)
Considering a bunch of factors such as the high Fs figure (free-air resonance) of the driver , and it's fairly small VAS figure for a 15 (it is a lower compliance type driver , which is not a bad thing necessarily) , along with it's limited Xmax rating i would not tune it too low ......
Your 40hz Fb (tuning) as shown in your design and Brian's is about as low as i would go with it...🙂
Higher tunings would of course allow for higher output and higher power handling but really starts to take away from many modern musical styles so you should try to figure out just how low your music really goes ...
If it turns out that your music only goes down to 50hz or 45hz then that is great!
Tune your cabinet to that frequency and enjoy the increased performance Hi Matthew, thanks for your reply. Yes, that are the boxes a watch before for build so I not decided to but think I go for the 6th order bandpass…😀
Looks like you went with a THAM15 layout. Did you go with the original box dimensions, or did you tweak them for best results with that Pioneer speaker?
Yes, i finally use the original tham15 layout and y really like the sound. it has a deep bass but has a little lack in the punch bass. I think 4 of them go to solve the problem jaja. I recomend the design 
The original THAM15 layout (S1=344, S4=1187, path length=234.70) actually is a fairly decent match for that Pioneer driver, going by its t/s parameters. Useless above about 100 Hz though. Response will smooth out a bit with 4 of them, but you still need something that can takeover from about 100 Hz up at least.
Is that specifically for this driver?
Usually the response is fine to about 130Hz, the dip kicks in around 150Hz, graph below from Andrew Cowan using the 18sound 15lw1401, a fairly standard 15" driver.
Hi Martinsson, Since the Tham15 is a pretty old design and with the way Hornresp is improved over the years, do you think the Tham15 design can also be improved likewise?
True, the THAM15 is getting close to being 9 years old counting from the design release, I have no doubts it can be improved, and I know there has been attempts made here and there.
The initial question for such an exercise will most likely be what the constraints should be, and what would constitute an improvement?
it is fun to notice though that the interest for the THAM15, despite it's age, is still remarkably high and it is the design I get most questions, comments and impressions about via mail, sometimes I wonder how many has been built worldwide.
The initial question for such an exercise will most likely be what the constraints should be, and what would constitute an improvement?
it is fun to notice though that the interest for the THAM15, despite it's age, is still remarkably high and it is the design I get most questions, comments and impressions about via mail, sometimes I wonder how many has been built worldwide.
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