Looking for a skilled Hornresp user - RCF L15P/06C
Printed From: Speakerplans.com
Category: Plans
Forum Name: Scoops
Forum Description: One scoop or two ;-)
URL: https://forum.speakerplans.com/forum_posts.asp?TID=93622
Printed Date: 26 March 2026 at 8:27pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Looking for a skilled Hornresp user - RCF L15P/06C
Posted By: dcibel
Subject: Looking for a skilled Hornresp user - RCF L15P/06C
Date Posted: 20 October 2015 at 3:48am
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Hi all, I have a pair of ancient speakers that I would like to put to good use. They are RCF L15P/06C. I haven't found much info about them online, just a few posts. They seem to be well liked, and one post suggested that they would work well in a "Staiper Microscoop". These speakers have a exteremely low Qts making them difficult to use in a "normal" sealed or ported cab, so I am open to other suggestions on what to do with them. I am not new to acoustic design, however I don't really have any horn experience. Is there someone experienced with Hornresp that can run a simulation of this driver in a Microscoop? Below is the cabinet design and a link to my measured T/S parameters.  https://drive.google.com/file/d/0B-GpgK57lLMNZGxGdWVUaTMyLVE/view?usp=sharing
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Replies:
Posted By: JR.junior
Date Posted: 20 October 2015 at 8:35am
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will do it in time. ------------- Support the scoop technology, larger mouth plays louder! |
Posted By: dcibel
Date Posted: 20 October 2015 at 2:28pm
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Thank you. I am also open to suggestions, if there is something more suited to use with these drivers, like a BFM Tuba 30 or somehing like that.
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Posted By: all bass
Date Posted: 21 October 2015 at 6:38am
There is no 15" Tuba. Might fit a Titan48. ------------- https://www.instagram.com/my_modular_journey/ |
dcibel wrote:Posted By: b grade
Date Posted: 21 October 2015 at 2:25pm
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Tuba 60 can be made for a Lab15 apparently. Its the "small" (LOL) version, as opposed to the full version with dual lab 12s. |
Posted By: fatfreddiescat
Date Posted: 21 October 2015 at 3:47pm
Try putting the model number of the drivers in your thread title, you just may catch some ones attention 
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Posted By: Teunos
Date Posted: 21 October 2015 at 4:25pm
This is a model of it i once did quite some time ago. Modeled as a tapped horn with the taper at the center of the panel where the speaker attaches. Think its pretty accurate though. Put in your own parameters to run the simulation.
------------- Best regards, Teun. |
Posted By: dcibel
Date Posted: 21 October 2015 at 4:50pm
Done
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Posted By: dcibel
Date Posted: 21 October 2015 at 4:50pm
Thanks, I'll have a look at this later today!
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Posted By: turbo7
Date Posted: 21 October 2015 at 9:43pm
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i would help but find no parameters ! High overall damping is good, but what about x-max f. ex ! |
Posted By: dcibel
Date Posted: 21 October 2015 at 11:23pm
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Parameters were linked in my first post. Here they are again: https://drive.google.com/file/d/0B-GpgK57lLMNZGxGdWVUaTMyLVE/view?usp=sharing Xmax is unknown, estimate between 4-5mm.
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Posted By: dcibel
Date Posted: 22 October 2015 at 7:59pm
How do I get "Fr" and "Tal" to show up for a Tapped horn? Once I set the driver arrangement to Tapped Horn, these values change to "Ap" and "Lpt". I also found this thread with some different values for this cab, which I'll try out as well once I can figure out this Hornresp program, just for comparison sake. http://forum.speakerplans.com/staiper-micro-scoop-on-winisd-hornrsp_topic52339.html
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Posted By: dcibel
Date Posted: 23 October 2015 at 2:38pm
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I can't figure out how to upload images to this forum, so here' s a bunch of links to my Google Drive. This is the results using the values posted by Teunos, with the exception that I don't get Fr and Tal values when I select tapped horn, and am uncertain of the values for Apt, Lpt, Vtc, etc. https://drive.google.com/file/d/0B-GpgK57lLMNdHZhQkxldmlnNnM/view?usp=sharing https://drive.google.com/file/d/0B-GpgK57lLMNY0Q5dUJURXJhRlk/view?usp=sharing This is the results using the values from the other thread that I linked to above: https://drive.google.com/file/d/0B-GpgK57lLMNaV9BZGxDRHhQQ2M/view?usp=sharing https://drive.google.com/file/d/0B-GpgK57lLMNTU5YZm1tTGFodDQ/view?usp=sharing I'm not confident I've done this sims correctly due to not understanding what a few of the values mean, regardless it looks like I should be able to get extension down to about 40Hz with this combination.
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Posted By: Teunos
Date Posted: 23 October 2015 at 3:51pm
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the sim you ran on my input data looks about the same as what i got when i quickly tried it with your parameters. The other simulation you did that you got from the topic assumes a standard rear loaded horn while you also used TH mode! This is wrong! If you use those numbers, you have to put the driver arrangement to Normal Nd. I think if you use my numbers and the correct mode for that (TH, like you did) and compare that with the sim from the other thread but then with The correct mode for that (Normal Nd), then the simulations will probably be pretty equal. I dont think there will be large discrepancies between the TH model (mine) or the ND model (from the other thread) Do you get what i mean? ------------- Best regards, Teun. |
Posted By: dcibel
Date Posted: 23 October 2015 at 5:21pm
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Thanks so much. You are correct, the sims are very similar when I set the other to normal Nd, however with a difference of 5dB sensitivity, your values being the lower of the two. The shape of the response is equal however, which is what I wanted to see anyway. It looks like a nice extension to 40Hz, requiring a sharp high pass filter below that. I am actually quite satisfied with the result, so I will likely proceed to build a pair of scoops for these drivers. Thanks everyone for the assistance!
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Posted By: b grade
Date Posted: 23 October 2015 at 6:26pm
| Is the ND and the TH in the same Ang? 5 DB increase is probably with a more optimistic space. |
Posted By: dcibel
Date Posted: 23 October 2015 at 7:22pm
| Aha! Right you are, I had one set to 1Pi, the other at 2Pi. Now they are right on top of each other. PEBCAC. |
Posted By: b grade
Date Posted: 23 October 2015 at 7:39pm
| been there done that. :) |
Posted By: Teunos
Date Posted: 23 October 2015 at 8:18pm
Jup like i said, mine is modeled as a TH but if you get the numbers correct then it doesnt really matter if you use a TH or a rearloaded horn configuration. Hornresp basically just uses impedance transformer models for each section of the horn. An entire cab is just a nodal labyrinth of sections and all of them combined with the electric equivalent of the driver as source, you must get the same result if the model is true to the physcial representation of the actual cab. Be it a TH or BLH, in this case you can use both ;) ------------- Best regards, Teun. |
Posted By: ampedupelectronics
Date Posted: 25 May 2025 at 4:17pm
Hi, this link is broken but I am hoping you still have the T/S perimeters to post for this driver? |