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Just picked up my A$$ scoops.
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mykey View Drop Down
Old Croc
Old Croc


Joined: 18 August 2005
Location: UK/Indonesia
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Points: 9680 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2007 at 12:18am
mush motor
Fane Collossus 400
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mykey View Drop Down
Old Croc
Old Croc


Joined: 18 August 2005
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Points: 9680 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2007 at 12:21am
Originally posted by hikk hikk wrote:

Originally posted by Tekasis Tekasis wrote:

Ain't tested them both side by side yet Hikk.
Might have to keep the results to my self though, as don't want to hear bout no politics or friction again on here.
 
 
lol lol lol well meber that THE TRUTH IS AN OFFENCE BUT NOT A SIN...so aslong as you keep it that way nothing can go wrong...
LOL so are you saying with all the noise you have made in the past ,that now SHORTMANS are not up to it?? LOl i mean if they was YOU would BE shouting lol with respect !  OR NOT?
I make Hikk right
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Rog View Drop Down
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Joined: 23 March 2010
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Points: 2166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2007 at 9:26am
Tek,
 
A mush motor is a woofer with a small and not very powerful magnet/motor system.
 
If you look at what I wrote, it says PD186 almost makes it into the mush motor group. Its specs rate it like a tight woofer, but in reality it shares many parts and some T/S with a mush motor. It behaves more like a mush motor than its specs say, is what I'm saying. Low fs is not a sign of a mush motor.
 
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Tekasis View Drop Down
Old Croc
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Joined: 03 July 2006
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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: 11 April 2007 at 10:45am
Cheers for clearing that up Rog
 
Next, the Eighteen Sound 18LW1400 18'' EXTENDED L.F. Woofer
 
Seems like no one or not many have tried this driver yet in a scoop.
 
Looking at the spec, what do you reckon.
 
Would work in narrow rear chambers or deep chambers?
 
Out of Rog's list, where would this fall into ?
 
Dont this look good ?
 
 
Nominal Diameter 460 mm (18 in)
Rated Impedance 8 Ohm
Continuous Pink Noise  1000 W
Continuous Power  700 W
Program Power  1400 W
Peak Power  7000 W
Sensitivity  98 dB
Frequency Range  28 - 2500 Hz
Power Compression @-10dB  (70 W) 0,8 dB
Power Compression @-3dB (350 W) 2,1 dB
Power Compression @Full Power (700 W) 3,0 dB
Max Recomm. Frequency 500 Hz
Recomm. Enclosure Volume 130 ÷ 350 lt. (4,59 ÷ 12,36 cuft)
Minimum Impedance 6,4 Ohm at 25°C
Max Peak To Peak Excursion 50 mm (1,97 in)
Voice Coil Diameter 100 mm (4 in)
Voice Coil Winding Material copper
Polarity positive voltage on red terminal gives forward cone motion

THIELE SMALL PARAMETERS

 

Fs 31 Hz
Re 5 Ohm
Sd 0,1225 sq. mt. (189,88 sq. in.)
Qms 7,2
Qes 0,31
Qts 0,29
Vas 297 lt. (10,49 cuft)
Mms 190 gr. (0,42 lb)
BL 24,7 Tm
Linear Mathematical Xmax  ± 9 mm (± 0,35 in)
Le (1kHz) 2,3 mH
Ref. Efficiency 1W@1m (half space) 96,5 dB

MOUNTING INFORMATIONS

 

Overall diameter 462 mm (18,18 in)
N. of mounting holes 8
Mounting holes diameter 8,5 mm (0,33 in)
Bolt circle diameter 438-440 mm (17,24-17,32 in)
Front mount baffle cutout ø 416 mm (16,38 in)
Rear mount baffle cutout ø 422 mm (16,61 in)
Total depth 213,9 mm (8,42 in)
Flange and gasket thickness 26 mm (1,02 in)
Net weight 13,3 kg (29,36 lb)
Shipping weight 14,9 kg (32,9 lb)
CardBoard Packaging dimensions 482 x 482 x 257 mm (18,98 x 18,98 x 10,12 in)
 
 
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Rog View Drop Down
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Points: 2166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2007 at 10:56am

Haven't got the PD184 specs infront of me, but from memory its a bit like a PD184.

I think it would work well in a scoop with a medium size chamber. Also great for reflex. It goes into the general purpose bass drivers list.

 
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Tom Umney View Drop Down
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Joined: 26 February 2004
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Points: 4954 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom Umney Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2007 at 6:04am
@Tek: The Beyma 18G50 or 18G550, especially the 18G50 looks to definatly beat PD186 in scoops.
 
 
Especially how the BL on the 18G50 is 28.8.
 
 
 
 


Edited by Tom Umney - 17 April 2007 at 6:06am
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levyte357 View Drop Down
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Joined: 10 May 2004
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Points: 11743 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357 Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2007 at 6:51am
Originally posted by Tom Umney Tom Umney wrote:

@Tek: The Beyma 18G50 or 18G550, especially the 18G50 looks to definatly beat PD186 in scoops.
 
 
Especially how the BL on the 18G50 is 28.8.
 
 
 
 



Higher BL drivers have sharper power dip in horns between 40-70hz, and sound a bit one note'ish.

I prefer Mid 20's BL for scoops.
"Who am I? I'm the guy who does his job.. You must be the other guy".
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