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Mircea Bartic View Drop Down
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Joined: 18 February 2005
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Points: 2581 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 06 March 2007 at 8:24am
Originally posted by staiper staiper wrote:

 
.. 95-100kg with PD1850 in cabinet


I presume that Weight to be in birch ply

I calculated in MDF, as I can only see this beast used in installs

the P-audio SD21EL monsters subs, we designed, were about 180Kg each (and the outer dimensions were similar)


general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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MarjanM View Drop Down
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Points: 7669 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 06 March 2007 at 9:33am
It will be less in weight than Lab Sub and with more convenient driver. Exactly what i needed.
Marjan Milosevic
MM-Acoustics
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https://www.facebook.com/pages/MM-Acoustics/608901282527713
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Tekasis View Drop Down
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Points: 6492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tekasis Quote  Post ReplyReply Direct Link To This Post Posted: 08 March 2007 at 5:16am
Originally posted by staiper staiper wrote:

 Both PD1850 and V18-1200 are suitable for this cabinet.

PD1850 will give a bit more aggressive "dryer" sound than other two noted in post .. all sim. prediction.

 
Originally posted by staiper staiper wrote:

Hi,
 
V18-1000 is very close to PD1850. Will fit (even grooves on panels "J" & "B" are not required if panels and speaker cutout is positioned precse as required) ..but you will lose some LF extencion (under35Hz) in comparison with V18-1200 or L18P300.
 
Best wishes,
            Stipe
 
 
Hi again Stipe, you may have seen or read on some threads about a driver called the TurboMax 1200 made by RMJ Loudspeakers ?
 
Anyway, the magnet is not as big as the PD's or the V18's but the depth of the driver is approximately 8.5 inches.
 
What do think about this driver fitting in the chamber of your Hog scoop ?
 
From the brief specs below, do think it would be an ideal choice for the HOG ?
 
depth is 8.25 inches not including front gasket, res. is 32Hz which can be lower if required (26Hz) 
 
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staiper View Drop Down
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Points: 540 		Post Options Post Options   Thanks (0) Thanks(0)   Quote staiper Quote  Post ReplyReply Direct Link To This Post Posted: 08 March 2007 at 8:06am

@madboy - Speaker unit mounted in Hog Scoop becomes unloaded at freq. below 25Hz so I recommend setting high pass filter (subsonic filter) at 25-30 Hz to prevent unit damage and relieve some power for upper range.

 

@Tekasis - I can't find TSP-s for TurboMax 1200 unit. If magnet structure is same or smaller diameter than P.audio SD18 it may fit even without routed grooves... but I can't tell you for sure without exact side-view dimensions.

 

Best wishes,    

           Stipe



Edited by staiper - 08 March 2007 at 8:07am
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Rengade Project View Drop Down
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Joined: 12 December 2004
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Points: 601 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rengade Project Quote  Post ReplyReply Direct Link To This Post Posted: 08 March 2007 at 10:05pm
I have to thank you staiper for this design!!!May build one and load it with OEM Magnum 18LF to test.
MUSIC SWEET,www.myspace.com/renegadeproject
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madboy View Drop Down
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Joined: 06 January 2007
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Points: 27 		Post Options Post Options   Thanks (0) Thanks(0)   Quote madboy Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2007 at 2:24am
i search many sites but cant find
give me here schematic for HPF filter
 


Edited by madboy - 10 March 2007 at 11:48am
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jethrocker View Drop Down
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Joined: 07 June 2006
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Points: 1942 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jethrocker Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2007 at 3:50pm
madboy..you want to build your own HPF?.. search sallen-key high pass filter, or active crossover circuits to find a schematic. There are hundreds about online...
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madboy View Drop Down
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Points: 27 		Post Options Post Options   Thanks (0) Thanks(0)   Quote madboy Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2007 at 4:48pm

thanks man , i find hpf filtter
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Rengade Project View Drop Down
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Joined: 12 December 2004
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Points: 601 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rengade Project Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2007 at 5:47pm

There are many crossovers that come with high pass filters so you may already have one!
MUSIC SWEET,www.myspace.com/renegadeproject
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jethrocker View Drop Down
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Joined: 07 June 2006
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Points: 1942 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jethrocker Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2007 at 6:01pm
yep, check your eq too, if you have one.. quite often a variabale high pass on them.
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madboy View Drop Down
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Points: 27 		Post Options Post Options   Thanks (0) Thanks(0)   Quote madboy Quote  Post ReplyReply Direct Link To This Post Posted: 11 March 2007 at 1:12pm
i think use this circuit
and with little corection from me :) variable from  10Hz up to 50 Hz
this frequency range OK or not?
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CHAMPION View Drop Down
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Joined: 30 September 2004
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Points: 3660 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAMPION Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2007 at 6:52am
Just 2 Questions
 
1.  Why is the chamber do compact / tight, similar to Microscoops, what advantages / disadvantages does this have with sound ?
 
2. is there a function ofthe baffle being at an angle ?
 
 
Thanks
 
Sticks n Stones
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