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stanley dj
Registered User Joined: 19 July 2013 Location: Ireland Status: Offline Points: 154 |
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Posted: 23 July 2014 at 7:39pm |
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hi all any plans for some g subs with 18 sound 18lw1250 i have couple of this drivers and want to use them in some nice project thanks to all there is parameters
General Specifications
Nominal Diameter 460mm(18 in) Rated Impedance 8Ohm AES Power 1000W ProgramPower 1400W Peak Power 7000W Sensitivity 98 dB Frequency Range 35 - 3500 Hz Power Compression @-10dB 0,7 dB Power Compression @-3dB 1,6 dB Power Compression @Full Power 2,6 dB Max Recomm.Frequency 500 Hz Recomm. Enclosure Volume 120 ÷ 350 lt. (4,24 ÷ 12,36 cuft) MinimumImpedance 6,4Ohmat 25°C Max Peak To Peak Excursion 36mm(1,42 in Voice Coil Diameter 100mm(4 in) Voice CoilWindingMaterial copper Suspension M-roll. Polycotton Cone Curvilinear, Paper Thiele Small Parameters Fs 35 Hz Re 5Ohm Sd 0,1134 sq.mt. (175,7 sq.in.) Qms 8 Qes 0,28 Qts 0,27 Vas 268 lt. (9,47 cuft) Mms 142 gr. (0,31 lb) BL 23,6 Tm LinearMathematical Xmax ± 9mm(±0,35 in) Le (1kHz) 2,73mH Ref. Efficiency 1W@1m(halfspace) 98 dB Edited by stanley dj - 23 July 2014 at 7:40pm |
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djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Stick all the info into WinISD (a totally free download) and see what you get. Change the cab volume if needed until you achieve a perfect box for the drivers.
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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stanley dj
Registered User Joined: 19 July 2013 Location: Ireland Status: Offline Points: 154 |
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mm its not working on mac :(
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djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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Should work as-is, with a bit of EQ.
The combination of quite high Le and lowish Qts means there will be a steady increase in sensitivity as frequency increases which will throw off your crossover point if you don't correct it, and it'll take a little boost near Fb to stretch the low end a little. Yellow is unprocessed, Blue has the following: PEQ: 230Hz, -3dB Q 0.6 LPF: 100Hz Butt24 HPF: 32.7Hz Butt24 PEQ: 37.8Hz +2dB Q 3 Both have power set to keep excursion at or below Xmax within the passband, the processed one also keeps it below Xmax at all frequencies, unprocessed it exceeds Xmax at all frequencies below 33Hz. Edit - resized image to be clearer
Edited by DMorison - 24 July 2014 at 8:32pm |
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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PS you can save a few milliseconds off the group delay from all that processing by using a higher frequency, lower order HPF and more boost on the 2nd PEQ to compensate: HPF: 41.2Hz Butt12 PEQ: 37.8Hz +4.5dB, Q 2.5 HTH, David.
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stanley dj
Registered User Joined: 19 July 2013 Location: Ireland Status: Offline Points: 154 |
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wow how u do this ? :D
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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Proper version of WinISD (ie not the really basic online version) on a proper computer
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stanley dj
Registered User Joined: 19 July 2013 Location: Ireland Status: Offline Points: 154 |
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u r genius :D thank u
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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use WINE.... |
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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...or VODKA... wine hurts your kidneys in the morning! Lol |
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If it sounds like a gorilla is trying to escape, turn it down.
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ibm-studio
New Member Joined: 02 April 2014 Location: United Kingdom Status: Offline Points: 2 |
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Brothers who has a project (a exact the sizes, a photo) on SEEBURG acoustic line G Sub, send please ( ibm-studio@mail.md ) or lay out here, I will pay that who will draw the exact project
Edited by ibm-studio - 09 November 2016 at 9:51am |
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