Speakerplans.com Homepage
Forum Home Forum Home > Plans > Other plans
  New Posts New Posts RSS Feed - g subs
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

g subs
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
stanley dj View Drop Down
Registered User
Registered User


Joined: 19 July 2013
Location: Ireland
Status: Offline
Points: 163 		Post Options Post Options   Thanks (0) Thanks(0)   Quote stanley dj Quote  Post ReplyReply Direct Link To This Post Topic: g subs
    Posted: 23 July 2014 at 7:39pm
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
Back to Top
djeddie View Drop Down
Old Croc
Old Croc
Avatar

Joined: 26 April 2004
Location: Bristol
Status: Offline
Points: 4125 		Post Options Post Options   Thanks (0) Thanks(0)   Quote djeddie Quote  Post ReplyReply Direct Link To This Post Posted: 23 July 2014 at 8:56pm
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.
Chas n Dave : it's like Drum and Bass but with beards.             E=mc² ±3dB
Back to Top
stanley dj View Drop Down
Registered User
Registered User


Joined: 19 July 2013
Location: Ireland
Status: Offline
Points: 163 		Post Options Post Options   Thanks (0) Thanks(0)   Quote stanley dj Quote  Post ReplyReply Direct Link To This Post Posted: 23 July 2014 at 10:27pm
mm  its not working on mac  :(
Back to Top
djeddie View Drop Down
Old Croc
Old Croc
Avatar

Joined: 26 April 2004
Location: Bristol
Status: Offline
Points: 4125 		Post Options Post Options   Thanks (1) Thanks(1)   Quote djeddie Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2014 at 8:00pm
Originally posted by stanley dj stanley dj wrote:

mm  its not working on mac  :(

In that case... ISD Online!!!
Chas n Dave : it's like Drum and Bass but with beards.             E=mc² ±3dB
Back to Top
DMorison View Drop Down
Old Croc
Old Croc


Joined: 14 March 2007
Location: Aberdeen
Status: Offline
Points: 1740 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2014 at 8:26pm
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
Back to Top
DMorison View Drop Down
Old Croc
Old Croc


Joined: 14 March 2007
Location: Aberdeen
Status: Offline
Points: 1740 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2014 at 9:27pm
Originally posted by DMorison DMorison wrote:

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


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.
Back to Top
stanley dj View Drop Down
Registered User
Registered User


Joined: 19 July 2013
Location: Ireland
Status: Offline
Points: 163 		Post Options Post Options   Thanks (0) Thanks(0)   Quote stanley dj Quote  Post ReplyReply Direct Link To This Post Posted: 24 July 2014 at 10:25pm
wow   how u do this  ?  :D
Back to Top
DMorison View Drop Down
Old Croc
Old Croc


Joined: 14 March 2007
Location: Aberdeen
Status: Offline
Points: 1740 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2014 at 9:59am
Originally posted by stanley dj stanley dj wrote:

wow   how u do this  ?  :D

Proper version of WinISD (ie not the really basic online version) on a proper computer Wink
Back to Top
stanley dj View Drop Down
Registered User
Registered User


Joined: 19 July 2013
Location: Ireland
Status: Offline
Points: 163 		Post Options Post Options   Thanks (0) Thanks(0)   Quote stanley dj Quote  Post ReplyReply Direct Link To This Post Posted: 26 January 2015 at 6:55pm
u r genius   :D  thank u 
Back to Top
bob4 View Drop Down
Old Croc
Old Croc
Avatar

Joined: 29 February 2004
Location: Finland/Germany
Status: Offline
Points: 1924 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bob4 Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2015 at 1:42pm
Originally posted by stanley dj stanley dj wrote:

mm  its not working on mac  :(


use WINE....
Back to Top
mini-mad View Drop Down
Old Croc
Old Croc
Avatar

Joined: 13 July 2012
Location: london
Status: Offline
Points: 6861 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2015 at 3:16pm
Originally posted by bob4 bob4 wrote:

Originally posted by stanley dj stanley dj wrote:

mm  its not working on mac  :(


use WINE....

...or VODKA... wine hurts your kidneys in the morning! Lol
If it sounds like a gorilla is trying to escape, turn it down.
Back to Top
ibm-studio View Drop Down
New Member
New Member


Joined: 02 April 2014
Location: United Kingdom
Status: Offline
Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ibm-studio Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2016 at 7:55am
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
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.08
Copyright ©2001-2026 Web Wiz Ltd.