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H/R118 by Startec

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rafaga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rafaga Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2011 at 10:08pm
so much different from 18TBX100 LF18N401!!! 
much better options here like this NDC18-4S 
http://oem.ciare.com/en/296/369/prodotti.php 

thank you for what you want to help 


Edited by rafaga - 07 October 2011 at 10:17pm
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rafaga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rafaga Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2011 at 10:13pm
and how to calculate, change the length of the port 18tbx100

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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2011 at 10:20pm
What do you have in those boxes now?

Marjan Milosevic
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https://www.facebook.com/pages/MM-Acoustics/608901282527713
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rafaga Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2011 at 10:42pm
18tbx100
tried to put PD 186
port as it works loose
RCF not set
so I asked how to change the length of the port by another speaker
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rafaga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rafaga Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2011 at 10:44pm
port does not work

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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2016 at 11:22pm
Hi all,

tried to sim the RCF lf18 g401 in this cab, sim looked great until I simmed it with 900w going through it. The xmax was all over the place, even at lower power levels. 

Anyone know what I can do to solve this or if I have got something wrong ?

I would use the Neo version of the 401 but I don't have an amp big enough for 1200w a side unless i bridge it. 

Would really like to use this design with the lf 18 g401 but I'm at a loss as to what to do now.

I understand that a hybrid BPH is serious business and hard to design but maybe there is something I can do to make it work ??

searched all around the french forum but got no real answers. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2016 at 11:23pm
Can post sims later if required 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 02 November 2016 at 7:51am
anyone ?

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Mark James View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark James Quote  Post ReplyReply Direct Link To This Post Posted: 02 November 2016 at 6:24pm
have you simmed other drivers in? 
i wouldnt worry about the excursion being all over the place just within limits in the pass band tbh
input parameters you are using?
If you want people to feel the bass then a reflex design is probably best as you get the most air movement per decibel from those.      errrrr yes wtf?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SonicXtasy Quote  Post ReplyReply Direct Link To This Post Posted: 05 December 2016 at 12:58am
I have some Faital Pro 18HP1060's that model the same as the RCF LF18N401's that it was designed around. They actually has a slightly higher output due to higher xmax. The size and weight of this cab seem manageable, it can be used in singles and its efficiency and output seem to be as high as most other cabs in this size range. It seems to be the perfect cabinet except that I would like it to go a little lower. The current tuning appears to be around 40hz. I have modeled it in hornresp as it is and with the port tuned to 35hz. Tuned to 35hz the efficiency at 40hz drops a few db and it runs out of xmax a little sooner but otherwise still seems to be a very competent cabinet. Other than the 2 noted compromises are there any other issues with the lower cabinet tuning that I am missing?


18HP1060 VS LF18N401 




18HP1060 VS LF18N401 Maximum output (1060 is black)




Standard vs 35hz tuning (1060)



Standard vs 35hz tuning Maximum output(1060)

The member formally known as vwbidder.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 05 December 2016 at 7:34pm
Will increasing rear chamber size increase 30-45 Hz out put? How much?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 05 December 2016 at 7:53pm
how would you do that?
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