Okay thats what confused me. I figured that was just a generic name that he gave the tapped horn. I think I am going to build a few of these for some DJ friend, i just need them to give me the okay and the funding!!! (because i have absolutely NO need for these at all, but i do want to build lol)
Can you model some B&C drivers in this box? Thankyou!
Can you model some B&C drivers in this box? Thankyou!
I have done a quick sim on the B&C 18TBX100
Initial 1w response looks promising
If Xmax is 9mm then x-max is reached at just above 56V (400W /8R)
(no allowance for compression!)
Comparisons on charts
2.8v Grey PD1850 Black B&C TBX
Theoretical Xmax limited outputs Grey PD1850 @80V - 11mm Black TBX100 @ 56V 9mm
Please download Hornresp and feel free to compare other drivers yourself!
Initial 1w response looks promising
If Xmax is 9mm then x-max is reached at just above 56V (400W /8R)
(no allowance for compression!)
Comparisons on charts
2.8v Grey PD1850 Black B&C TBX
Theoretical Xmax limited outputs Grey PD1850 @80V - 11mm Black TBX100 @ 56V 9mm
Please download Hornresp and feel free to compare other drivers yourself!
Attachments
18TBX100
The system Fs is 38Hz and the driver has an own resonance of 34Hz so nothing to worry about when it comes to excursion. To drive it to 11mm you need 69V = 600Watt and then it's already suffering from severe compression (3dB to 6dB). So you need at least 1200 Watt to get it to 11mm. You can drive this B&C just as it is AES rated which counts for most well engineered drivers in TH's.
The system Fs is 38Hz and the driver has an own resonance of 34Hz so nothing to worry about when it comes to excursion. To drive it to 11mm you need 69V = 600Watt and then it's already suffering from severe compression (3dB to 6dB). So you need at least 1200 Watt to get it to 11mm. You can drive this B&C just as it is AES rated which counts for most well engineered drivers in TH's.
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In a way it is, I wanted people to think about the distribution of frequencies in actual program material.
Years ago I had a sub that according to the simulation would hit x-max with about 150W. With actual program material I could put 1KW into it without a problem.
If I mix two tones an octave apart at 1:1 the upper tone will only add about 25% to the total excursion while requiring 6dB more power than just the lower tone by itself. This is a bit of a simplification, but gives a look at what is actually happening.
The woofer I was using had a low mechanical damage limit and could be bottomed out with a 100W amplifier if allowed to clip, but it would handle 1KW if it was clean. If I pre-clipped the signal to the amplifier, you could drive it 6dB~10dB into clipping without the driver bottoming out. Look at the 'soft clip' circuit in a NAD amplifier for an example of this circuit. It's actually a diode clipper on the input signal to the amplifier, the amplifier itself doesn't actually clip.
Years ago I had a sub that according to the simulation would hit x-max with about 150W. With actual program material I could put 1KW into it without a problem.
If I mix two tones an octave apart at 1:1 the upper tone will only add about 25% to the total excursion while requiring 6dB more power than just the lower tone by itself. This is a bit of a simplification, but gives a look at what is actually happening.
The woofer I was using had a low mechanical damage limit and could be bottomed out with a 100W amplifier if allowed to clip, but it would handle 1KW if it was clean. If I pre-clipped the signal to the amplifier, you could drive it 6dB~10dB into clipping without the driver bottoming out. Look at the 'soft clip' circuit in a NAD amplifier for an example of this circuit. It's actually a diode clipper on the input signal to the amplifier, the amplifier itself doesn't actually clip.
Hi Djim,
Post #228: "...system Fs is 38Hz and the driver has an own resonance of 34Hz..."
Just for accuracy's sake: Fs is the designation for the free-space resonance of the driver; Fb is the combined driver/enclosure(box) resonance frequency.
Post #228: "...own resonance..."
Probably a translation from the German Eigenfrequenz. You will sometimes find the term eigenfrequency, but usually not in the audio field.
A nice reference for general usage is:
Measuring Loudspeaker Driver Parameters
I know you know the technology very well, just trying to help with the translation.
Regards,
Post #228: "...system Fs is 38Hz and the driver has an own resonance of 34Hz..."
Just for accuracy's sake: Fs is the designation for the free-space resonance of the driver; Fb is the combined driver/enclosure(box) resonance frequency.
Post #228: "...own resonance..."
Probably a translation from the German Eigenfrequenz. You will sometimes find the term eigenfrequency, but usually not in the audio field.
A nice reference for general usage is:
Measuring Loudspeaker Driver Parameters
I know you know the technology very well, just trying to help with the translation.
Regards,
Hi Oliver,
Thank you for correcting me and your subtly way of notifying you are still reading, Oliver. I guess all these different languages with their own technical words over the years do seem to have an effect on my English. Btw, Fs in German language is "eigenresonanz" (literally: own-resonance) but you seem to know the difference with "eigenfrequenz" already, it makes me wonder...
Thank you for correcting me and your subtly way of notifying you are still reading, Oliver. I guess all these different languages with their own technical words over the years do seem to have an effect on my English. Btw, Fs in German language is "eigenresonanz" (literally: own-resonance) but you seem to know the difference with "eigenfrequenz" already, it makes me wonder...
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i have a macI have done a quick sim on the B&C 18TBX100
Initial 1w response looks promising
If Xmax is 9mm then x-max is reached at just above 56V (400W /8R)
(no allowance for compression!)
Comparisons on charts
2.8v Grey PD1850 Black B&C TBX
Theoretical Xmax limited outputs Grey PD1850 @80V - 11mm Black TBX100 @ 56V 9mm
Please download Hornresp and feel free to compare other drivers yourself!
how about the peavey lowrider as a pretty darn cheap alternative?
Peavey 18" Low Rider Subwoofer Speaker Driver
$350 or so for the entire subwoofer (driver, wood, glue etc)
Lame excusei have a mac
Get VMWare Fusion and WinXP, if you worry about viruses disable the network connectivity for the VM.
So in this article it states that an Eighteen Sound driver is used in the TH118...
Church Sound: Danley Introducing New TH-118 Tapped Horn Subwoofer At 2010 InfoComm - Pro Sound Web
Which one is he using? From the specs (power handling) i believe it is the 18nlw9600c woofer... the basket looks the same as well.
Anyone want to model the 18NLW9600c in this box? Thanks! (about $700 USD)
Or a cheaper alternative to the 9600c, the 18LW2400..... (about $320USD)
Church Sound: Danley Introducing New TH-118 Tapped Horn Subwoofer At 2010 InfoComm - Pro Sound Web
Which one is he using? From the specs (power handling) i believe it is the 18nlw9600c woofer... the basket looks the same as well.
Anyone want to model the 18NLW9600c in this box? Thanks! (about $700 USD)
Or a cheaper alternative to the 9600c, the 18LW2400..... (about $320USD)
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Would a cabinet loaded with the 9600 make enough of a difference to use only two cabinets vs. four cabinets loaded with the 2400's? 4 cabs with 2400's are right around the same price as the 9600's, but size increases by a lot, so harder to transport etc etc....
I'm going through the pdf posted in post # 215 and some of the measurements don't line up so i'm not sure which is off but i'm working on a cut sheet etc to see how much it's gunna take to do this. I can't wait!!
BTW Danley Sound Labs TH118 is $3300.... :O
I'm going through the pdf posted in post # 215 and some of the measurements don't line up so i'm not sure which is off but i'm working on a cut sheet etc to see how much it's gunna take to do this. I can't wait!!
BTW Danley Sound Labs TH118 is $3300.... :O