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RCF LF18N401 in 1850 or 186?
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noobsound View Drop Down
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Joined: 28 March 2008
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    Posted: 28 March 2008 at 6:51pm
hi 
 This is my first post here aldough i am reading the forum werry often.
 I have 2 of this drivers and i'm planing on purchasing another 2. the curent drivers i have are used in bass-reflex boxez with good results but now i am thinking of upgrading my sistem by adding 2 drivers and placing them in some horn boxez.
From my point of wiew the T/S of the driver will be ok for the 1850 as well as 1850 but i would like to ask u if u ever used this driver in this kind of enclosures.If u did plz tell me how they performed!
 i have constructed one 186 sub and it sounds great but i am afraid not to ripp the cone of the speaker in long term use that's why i am asking for ur' opinion on this.
 i will only put at moast 1 kw on each cab
 a pick of my build( for tests only) that's why they look so rough LOL
 
 ps: there is no way i can sell this speakers and buy 4  diferent drivers.
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Jake_Fielder View Drop Down
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Sorry no one has helped you so far....
 
Does anyone know about this?
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Jake_Fielder View Drop Down
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Read this: http://www.speakerplans.com/forum/forum_posts.asp?TID=6304
Its not great though
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Jake_Fielder View Drop Down
Old Croc
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Originally posted by Rog Mogale Rog Mogale wrote:

Originally posted by jozoraz jozoraz wrote:

what do you think of this driver in 1850 or 186 box?

RCF LF18N401 here are some preferences


THIELE - SMALL PARAMETERS
Resonance frequency Fs 32 Hz
DC resistance Re 5.1 Ohm
Mechanical factor Qms 6.5    
Electrical factor Qes 0.27    
Total factor Qts 0.26    
BL factor BL 27.8 T - m
Effective Moving Mass Mms 201 gr
Equivalent Cas air load Vas 257 liters
Effective piston area Sd 0.122 m2
Max. linear excursion (mathematical) Xmax 8.8 mm
Voice - coil inductance @ 1kHz Le1k 2.5 mH
Half-space efficiency Eff 3.01 %

 
I'd put that driver in the 1850 design cab.
 
I think it will sound really good. The Vas is a bit higher than the PD1850 which is a good thing. The RCF's does not have such a powerful motor system and so will have a bit more low bass and less kick. All things that should make it sound really good in the 1850 horn.
 
Rog.
 
There ya go!
 
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Jake_Fielder View Drop Down
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But its not a good idea to mix 186 and 1850 horns.....
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AdiRCF View Drop Down
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Points: 162 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AdiRCF Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 5:28pm
he will not mix 186 with 1850. he build a 186 simply for a test with P.Audio HP18 S. And now he wants to know if the rcf driver, n401, will work in 1850. mainly he's concerned that the cone will tear up.
Sughi Bughi
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noobsound View Drop Down
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Points: 67 		Post Options Post Options   Thanks (0) Thanks(0)   Quote noobsound Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 5:59pm
great !!  thanks a lot Jake.
 I wana start a new sistem and i want the greater spl posible out of 4 x bass bins. That's why i have interest in 1850 or 186 horns.
 On top of 2x1850's i am planing on using a stipe 2x12" waweguide design ( smt 212 ) with Paudio c12-300mb.Smile
i'm pretty excited how 4 horns will sound compared to my reflex cab in witch my 18" stands at this moment Tongue
 
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Jake_Fielder View Drop Down
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Points: 4236 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jake_Fielder Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 6:03pm

Expect a louder, faster but harder sound from the 1850s,

They should be a few decibels louder for the same input wattage.
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mylesound View Drop Down
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Points: 351 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mylesound Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 6:05pm
Keep us updated im really intrested in the 1850 Horn too but as im in the us PD drivers are hard to get.
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AdiRCF View Drop Down
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Joined: 22 June 2006
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Points: 162 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AdiRCF Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 6:21pm
if you didn't noticed by now, all the cabinets are made from cheapboard. Almoust all romanians do it cheapboard style PigClown so please don't make fun of us. Big%20smile

Edited by AdiRCF - 01 April 2008 at 6:23pm
Sughi Bughi
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noobsound View Drop Down
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Points: 67 		Post Options Post Options   Thanks (0) Thanks(0)   Quote noobsound Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 6:25pm

Mylesound  look at this:D

if u wanna see pictures of a test made in romania u can search this page.not in english but you can see them pics
some vids too Wink
 
 
i didn't participated at that test but AdiRCf did
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noobsound View Drop Down
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Points: 67 		Post Options Post Options   Thanks (0) Thanks(0)   Quote noobsound Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2008 at 6:26pm
sorry forgot to put the link to the forum
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