bass is important to be in front, a THAM I believe that is a hybrid horn, it has bass from closer front to distance, a standard horn have from 3-4 meters to low, and at 10 meters is very powerfull. I dont want standard horn inside!
BR is all around, so I dont need bass on stage. I dont want to make cardioid or end fire set up.
I want a THAM that get lower to 42 Hz.
BR is all around, so I dont need bass on stage. I dont want to make cardioid or end fire set up.
I want a THAM that get lower to 42 Hz.
I want a THAM that get lower to 42 Hz.
It's not that difficult to design a TH with a THAM-type fold that will reach 42 Hz. My POC2 for example is a 42 Hz capable 12" TH in a THAM-type fold. The issue you run into however is reduced SPL and power handling. If I was going to do that build again, I'd do it very differently (narrower box, driver mounted in the mouth rather than through it, more bracing at the throat). And if I wanted to do 40 Hz at any authority, I'd opt for a design based on a 15" or 18" driver with decent excursion potential.
The Subwoofer DIY Page - Projects : "Proof of Concept #2"
The THAM15 is 40 Hz capable without modifications. Look at the cone amplitude at 1000 watts and 11 mm (XVAR) with a B&C15TBX100. It is clearly amplifier limited below 45 Hz. Not xmax limited.
With the right processing the THAM15 is 40 Hz capable alone in 2,0 Pi.
With the right processing the THAM15 is 40 Hz capable alone in 2,0 Pi.
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The lowest resonance frequency of the THAM15 is above 40 Hz - check your first image. Typically, the only processing you want to do with a high-order alignment below its lowest resonance frequency is high-pass filtering to prevent over-excursion.
ROAR15 is even more capable down below 40 Hz and it has a much better midbass punch then THAM15.
A single ROAR12 could play Ninze, Jacob Groening, Balu Brixton and Deadmau5 without any subjective lack of bass at very loud levels in a large warehouse. Once we started to boost the bass down below 35 Hz with some EQ the B&C12PS100 started complaining quite loudly. But this was with a single channel from a Powersoft K10 (lots of power for a single 12PS100).
YouTube
A single ROAR12 could play Ninze, Jacob Groening, Balu Brixton and Deadmau5 without any subjective lack of bass at very loud levels in a large warehouse. Once we started to boost the bass down below 35 Hz with some EQ the B&C12PS100 started complaining quite loudly. But this was with a single channel from a Powersoft K10 (lots of power for a single 12PS100).
YouTube
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That 15TBX100 is an interesting driver btw. Did you use the semi-inductance parameters for it in your sim? They can make quite a difference.
This is an example of a 42 Hz tuned THAM-style fold that could work for the 15TBX100. Box size is 18"x25"x30" and CR is 3:1. Problem is that while the response looks decent with semi-inductance turned off, turning it on (using some parameters I derived from its published impedance curve) results in something quite different.
This is an example of a 42 Hz tuned THAM-style fold that could work for the 15TBX100. Box size is 18"x25"x30" and CR is 3:1. Problem is that while the response looks decent with semi-inductance turned off, turning it on (using some parameters I derived from its published impedance curve) results in something quite different.
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Thanks mate for yoru help.
Here is it.Below is the correct driver I have
RCF LF15G400
THIELE SMALL
Fs:48 Hz
RMS:800 WATTS
frecuencie Reponse : 30 ÷ 2 500Hz
Re:4,90 ohm
R2:10,00 ohm
Qms:6,10
Qes:0,31
Qts:0,290
Xmax:8,00 mm
Mms:99 g
mHL2:2,59 mH
L1:1,05 mH
impedance:8 ohm
Hvc:23,00 mm
Hag:14,00 mm
EBP:150
Vas:126 litre
Cms:108 µm/N
Sen:97,0 dB
Bl:21,5 Tm
Vd:728 cm3
Sd:910 cm2
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Here are some simulations i made with several drivers with Hornresp
Faital 15HP1010
Fs 40 Hz
Re 5.3 ohm
Qes 0.38
Qms 10
Qts 0.37
Vas 93.1 L
Sd 759 cm²
efficience 1.5 %
Xmax 9.75 mm
Mms 138.9 gr
BL 22 T.m
Le 1.8 mH
Beyma 15FC700
Fs 41 Hz
Re 5.9 ohm
Qes 0.38
Qms 4.8
Qts 0.35
Vas 153 L
efficience 2.7 %
Xmax 9.8 mm
Mms 106 gr
Le 1 mH
Precision Devices PD156
Fs 50.25 Hz
Re 5.69 Ω
Qms 7.45
Qes 0.5
Qts 0.47
Le 1 mh
L2 1.84 mh
R2 17.98 Ω
Vas 93.4 litres
Mms 124.55 g
Sd 907.92 cm2
Cms 80.83 µm/N
BL 20.98 T/m
Xmax 8.1 mm
Vd 0.648 litres
Ref. Efficiency 3.63%
I'm aiming for efficiency here (sound system will be running on batteries)
So i thought the Faital was maybe the best to go,
Any thoughts ?
Faital 15HP1010
Fs 40 Hz
Re 5.3 ohm
Qes 0.38
Qms 10
Qts 0.37
Vas 93.1 L
Sd 759 cm²
efficience 1.5 %
Xmax 9.75 mm
Mms 138.9 gr
BL 22 T.m
Le 1.8 mH
Beyma 15FC700
Fs 41 Hz
Re 5.9 ohm
Qes 0.38
Qms 4.8
Qts 0.35
Vas 153 L
efficience 2.7 %
Xmax 9.8 mm
Mms 106 gr
Le 1 mH
Precision Devices PD156
Fs 50.25 Hz
Re 5.69 Ω
Qms 7.45
Qes 0.5
Qts 0.47
Le 1 mh
L2 1.84 mh
R2 17.98 Ω
Vas 93.4 litres
Mms 124.55 g
Sd 907.92 cm2
Cms 80.83 µm/N
BL 20.98 T/m
Xmax 8.1 mm
Vd 0.648 litres
Ref. Efficiency 3.63%
I'm aiming for efficiency here (sound system will be running on batteries)
So i thought the Faital was maybe the best to go,
Any thoughts ?
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
hey can some one help me to redisign this subwoofer in size
it should be Front 50wide x70 high x45 deepperphaps up to 60 deep all in cm.
i want to use the 18sound 15nlw9600 in 4ohm or something better more modern from
faital - the brand new beymas.
could some one simulate this for me in AJHorn or Vituixcad or whatever
the orignal THAM15 is a bit smaller and i want to have this dimensions in cm to match my Tops. they are 50x70cm in Frontpanel.
Thanks
it should be Front 50wide x70 high x45 deepperphaps up to 60 deep all in cm.
i want to use the 18sound 15nlw9600 in 4ohm or something better more modern from
faital - the brand new beymas.
could some one simulate this for me in AJHorn or Vituixcad or whatever
the orignal THAM15 is a bit smaller and i want to have this dimensions in cm to match my Tops. they are 50x70cm in Frontpanel.
Thanks
You could use the BOXPLAN-THAM workbook from the site below for that purpose.
The Subwoofer DIY Page - Horn Folding
Wow, I haven't seen someone mention AJHorn in years. I think I have the program saved on my job's server.
Yeah, calling a 50 Hz cab a subwoofer is a bit of a stretch
It's all about the compromise. For PA use, SPL and packing density take priority most of the times, and like I said before, I've never seen a patron leave a party because he wasn't hearing anything below 50 Hz...
Probably depends more on how cold the beer is?
Have you ever measured the semi inductance values (derived from a sweep you performed)? Other than manufacturer data or obtaining measure from higher input than a dats provides I don’t really know how to go about it, but often see it’s necessity or potential improved accuracy.
Yeah, calling a 50 Hz cab a subwoofer is a bit of a stretch
It's all about the compromise. For PA use, SPL and packing density take priority most of the times, and like I said before, I've never seen a patron leave a party because he wasn't hearing anything below 50 Hz...
While nobody has left the party because of a 50Hz cutoff, I see people's eyes light up when they've got something flat to 40Hz and the bass drops down there.
My next sub will be flat to 30Hz, which should be an experience.
Chris