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Progrezz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Progrezz Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2009 at 3:41pm
Rather this one:
http://www.usspeaker.com/eighteensound-18LW1400-1.htm
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Crashpc View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Crashpc Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2009 at 9:54pm
Do you really think, that speaker with 4" Voicecoil  "Has more watts" than another with 5" voicecoil?
Whatewer can be written on there, it won't be true....
Nikon and Canon people should not be married to each other. Why did you let this happen?
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MusicXtra View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MusicXtra Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2009 at 10:03pm
Originally posted by Crashpc Crashpc wrote:

Do you really think, that speaker with 4" Voicecoil  "Has more watts" than another with 5" voicecoil?
Whatewer can be written on there, it won't be true....

The diameter of the voice coil doesn't say how much power it can have.
Most 18" speakers in this categorie are 700-1500 Watt, the X-max is for most subs a bigger ' problem'  than how much electrical power it can have and most of this speakers have an X-max from 8-10mm.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Crashpc Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2009 at 10:16pm
Sorry - but PD drivers are the most quality you can have in standart sales. It has really beast sizes of everything, not only VC, and people use it as I said with no damage.
You are right about cone excursion, but it is handle-able by good processor.
Tell me about Xmax? Many manufacturers only say, that Speaker reaching the Xmax produces some percentage of distortion, but nothing about how it will sound, or if the surround or spider will be damaged. Todays speakers can handle up to 30mm peak-peak of excursion, and you will not hear any bad sound from it, even if its Xmax is about 10mm 0-p.
The Xlim of these speaker is more than 50mm p-p, and for example B&C Speakers are not gonna crash the backplate even if you push 3000W to it, but waporize the voicecoil.

And diameter of the voicecoil matters :-)
No.
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No matter who started, I finish it! :-)
Nikon and Canon people should not be married to each other. Why did you let this happen?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote norty303 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2009 at 12:36am
Back to the original design (not the EAW one) it looks like a manifold BP6 cab, in fact very similar to the Beyma B25/9 from their old plans on the website.  Difficult to model because the front chamber is a whole port all by itself.  Certainly very different characteristics to 'just a BR' cab with a bent baffle.
 


 


 

 


Edited by norty303 - 20 October 2009 at 12:40am
My laser stuff: Frikkin Lasers
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mobiele eenheid View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2009 at 1:50am
Quote And diameter of the voicecoil matters :-)
No.
Yes!
No!
Stop it!
But he started!
No matter who started, I finish it! :-)
Mmmkay...Well, as they say in Holland; If 2 dogs are fighting for a bone, the 3rd one takes it home ;) {Als 2 honden vechten om een been, dan gaat de 3de er rap mee heen...}.
 
The quality of PD isn't for discussion, that's for sure ;)
 
However the 18LW1400 has a 4" VC, 5" VC for the PD, both have a voice coil winding height of 25 mm, the 18LW1400 has a gap depth of 15 mm, whereas the gap depth of the PD 186 is 9 mm.
15*4 = 60, 9*5 = 45--> 4:3 In the favor of the 18Sound.
 
The area of the gap depth is able to soak the heat radiation of the VC away, a larger area means more heat is able to escape into the cooling system/basket/magnet.
 
Both the 18LW1400 and the PD 186 where originally rated at 700 Wrms, the PD is probably a bit more conservative rated. I suppose they're quite up to one another.
 
Best regards Johan
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Crashpc Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2009 at 7:56am
This doesn't make people stop using it at power I told.... 
Nikon and Canon people should not be married to each other. Why did you let this happen?
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MusicXtra View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MusicXtra Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2009 at 11:33pm
And they are finishedBig smile

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Post Options Post Options   Thanks (0) Thanks(0)   Quote MusicXtra Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2009 at 11:38pm
And here's the back side with two NL8 and one NL4 speakon.

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audioalliance View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote audioalliance Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2009 at 6:59pm
jeeez they look madddddd
http://www.myspace.com/audioalliance
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ibex Quote  Post ReplyReply Direct Link To This Post Posted: 15 November 2009 at 3:18pm
Originally posted by Progrezz Progrezz wrote:

Why does everyone on this forum look down on bass reflex cabs? As far as sound goes, a BR is still the only way to go. Look at Meyer, L'Acoustics, EAW, ... Every sub in a live situation you'll see is a BR. Horns are only suitable for certain types of dance music and people only use it because of the high sensitivity and throw. But if you look at the Meyer 700-hp for instance, which in waffles oppinion is nothing more than a pain-ass reflex cab and hell it is, but those things sound mighty-fine, have a sensitivity of 110db, go awefully deep and throw pretty damn far. It's just one of the reasons why brands like Meyer and Eaw are still in business.


Referring to the Meyer Sound 700-HP Datasheet:

700-HP Specifications:
Maximum Peak SPL: 139 dB peak
Dynamic Range: >110 dB   ....that's not equal to the sensitivity!
Output Power: 2250 W (1125 W/channel)


Amplifier gain: 4500W = 36.5dB peak
Sensitivity: 139dB - 36.5dB = 102.5dB

cheers Beer


Edited by Ibex - 15 November 2009 at 8:45pm
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Teunos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Teunos Quote  Post ReplyReply Direct Link To This Post Posted: 15 November 2009 at 3:26pm
Originally posted by Ibex Ibex wrote:

 



Amplifier gain: 2250W = 33.5dB
Sensitivity: 139dB - 33.5dB = 105.5dB

cheers Beer

And the HP700 is a double 18, so probably 4 ohms, and sensitivity will also be lower I reckon.


Edited by Teunos - 15 November 2009 at 3:26pm
Best regards,
Teun.
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