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X1 Data and graphs with diferent drivers

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Mircea Bartic View Drop Down
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    Posted: 20 March 2007 at 5:02pm
Hi everybody

I started this thread in order to help the more beginner members of our forum build X1's  loaded with diferent drivers than the original one

first:

enclosure data

X1 is a  6th order bandpass

Chamber 1 - 189 Liters tunned to 42.2 Hz
Chamber 2 -  62 Liters tunned to 84.7 Hz

seems that ROG has done a veery good job with this bandpass, as it models verry good with a lot of drivers.




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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:11pm
P audio SD-18 

800W RMS

100dB/1W
129 dB / 800W

graph at full power below:


highpass at 35 Hz with 24 dB/octave
no excursion problems
do not exceed 1KW !

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:14pm
P audio C18-650EL

650W RMS

100dB/1W
128 dB / 650W

graph at full power below:


highpass at 35 Hz with 24 dB/octave
no excursion problems
do not exceed 800W !
general manager & head designer at nexus-acoustics research
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:17pm
P audio SD-18EL

1000W RMS

99.5dB/1W
129 dB / 1000W

graph at full power below:


highpass at 35 Hz with 24 dB/octave
no excursion problems
do not exceed 1200W !
general manager & head designer at nexus-acoustics research
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:21pm
P audio WN-18S

500W RMS

99.1dB/1W
126 dB / 500W

graph at full power below:



highpass at 35 Hz with 24 dB/octave
no excursion problems
do not exceed 600W !
general manager & head designer at nexus-acoustics research
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:24pm
P audio HP-18S

500W RMS

99.6dB/1W
127 dB / 500W

graph at full power below:


highpass at 35 Hz with 24 dB/octave
no excursion problems
do not exceed 600W !
general manager & head designer at nexus-acoustics research
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:27pm
P audio HP-18W

400W RMS

99.5dB/1W
126 dB / 400W

graph at full power below:


highpass at 35 Hz with 24 dB/octave
 excursion problems above 400W
do not exceed 400W !
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2007 at 5:31pm
Drivers tested, and found not to be usable in this design, even with alterations to the ports are:

P-audio C18-600LF
P-audio P-18N

is looks like there are some really cheap driver that can perform in this enclosure

remember, DO NOT OVERDRIVE these speakers, especially the cheaper ones because the X1 is a very brutal bandpass with uneven loading of the cone and severe unloading outside the operating range.

if you need other cones simulated in this designs , just ask

hope this helps



Edited by Mircea Bartic - 20 March 2007 at 5:32pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2007 at 9:55am
Nice thread my man.
 
Looks like your using Bass Box Pro for the sims. I didn't use that when I designed it. I'm not sure its accurate at 6th order BP. Cabs build from Bass Box Pro don't measure anything like the sims say they should.
 
The data used for the X1 is this, your'e close but I'm going to give you a detention for getting it wrong ha ha.
 
Rear Chamber (Vb1) 180 Litres
Front Chamber (Vb2)  64 Litres
 
Rear tuning      (Fb1) 38.5Hz
Front tuning     (Fb2) 73.5Hz
 
Bandwidth -3dB         56.7Hz
 


Edited by Rog Mogale - 27 March 2007 at 9:56am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote soundsystemdan Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2007 at 10:41am
I think the Void V18-1000 and PD1850 will of interest to a few.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike Severloh Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2007 at 12:39pm
Originally posted by Mircea Bartic Mircea Bartic wrote:

Drivers tested, ...
if you need other cones simulated in this designs , just ask

hope this helps

 
Hi Mircea,
 
it indeed does.
 
Personally IŽd like 2 see simus of the following drivers:
 
PD.186, PDN.18SB40 and PD.18BR40
BMS 18n850 (will withstand 2.5 kw of power, people say)
Beyma 18G480 and 118ndw
18sound 18ND9300
B&C 18TBX100 and 18PZB100
Ciare 18.009
Selenium 18SWS1100 and 18WS600
Dayton PF460
 
, mainly the lightweight neodyms, and of course with cabinet parameters Rog already released.
 
Thanx in advance.


Edited by Mike Severloh - 27 March 2007 at 12:41pm
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Rog View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2007 at 8:35pm
The problem is Mike that unless Mircea uses the program I used to design the X1 if he uses my tunings and chamber sizes he will not get an accurate sim.
 
I used two programs to do the X1. I used an Akabak script I wrote that takes many things into account, like that both ports are on the floor so the end correction gives a new lower port tuning. I also used a really old and modified version of LEAP that always seems spot on with real measurements.
 
Mircea's plots show the F3L point in the mid 40's, my sims all give an F3L in the mid to low 30's, which is consistant with Vb1. Theres also a plot on this site somewhere of an X1 vs a Lab horn, and the plot dosen't look anything like Mircea's sims. Just found the plot.
 
 
The plots were not taken in ideal condidtions as they were made at a bass shootout. So the location and room placement is reinforcing the low end quite a bit.
 
Rog.
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