15" tapped horn with RCF - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th July 2010, 12:35 PM   #1
wood1y is offline wood1y  Hungary
diyAudio Member
 
Join Date: Oct 2009
Default 15" tapped horn with RCF

Hi all!
I'm sharing here with you my tapped horn iíve recently finished.

First of all, thats not a th-115 copy.

It may look like the th-115, but i have never seen one in real yet, i dont know how it looks inside. All the calculations and woodwork are made by myself.

My goal was to build something goes down to 40 hz, and has more than 100 db/w/m sensitivity. I played around with hornresp and decided to use the RCF LF15 G401 in a 40 hz tapped horn.

Click the image to open in full size.

Click the image to open in full size.

Excursion powered with 800W
Click the image to open in full size.

Than i designed a cab for it:
Click the image to open in full size.

..and started making sawdust:
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

done...
Click the image to open in full size.

And here are the measurings i did outside with 2,83 V from 1m distance.

The unprocessed response:
Click the image to open in full size.

..and processed with a DSP:
HPF: 30 hz, 48db/o (for the speaker protection)
LPF: 200 hz, 48db/o
EQ: 200hz, -4db, Q1
Click the image to open in full size.

My goal has been achieved

We had the first "test" last weekend, a little electronic music party with 40-50 people in a middle sized room, and the result was astonishing. Incredibly deep bass, very loud and clean. It was driven by the T-AMP TA2400. I couldn't even drove it hard, bcause the whole building started falling apart.

(ps.: sorry for my poor english)
  Reply With Quote
Old 24th July 2010, 01:15 PM   #2
Dr_EM is offline Dr_EM  United Kingdom
diyAudio Member
 
Dr_EM's Avatar
 
Join Date: Oct 2006
Location: Swindon
Looks like a well executed project, very tidy

What is the black finish? Truck bed liner? It looks good for this sort of use.
  Reply With Quote
Old 24th July 2010, 01:17 PM   #3
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I second that, bravo! Nice work. I bet those DO shake the house.
  Reply With Quote
Old 24th July 2010, 01:42 PM   #4
wood1y is offline wood1y  Hungary
diyAudio Member
 
Join Date: Oct 2009
THX

Quote:
Originally Posted by Dr.EM View Post
What is the black finish? Truck bed liner? It looks good for this sort of use.
No... It is the Warnex textured lacquer... like this.

Click the image to open in full size.

Its very hard, u cant sctratch it, is waterproof and it still looks good ... I think this is the best choice for PA boxes.

Last edited by wood1y; 24th July 2010 at 01:48 PM.
  Reply With Quote
Old 24th July 2010, 02:08 PM   #5
diyAudio Member
 
Join Date: Apr 2010
Location: Saskatchewan
Nice job - looks great
  Reply With Quote
Old 24th July 2010, 02:57 PM   #6
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
Compliments on a sucessful project.
I would very much like to see your input parameters for Hornresp.
Also I an very interested in the parallel horn section that is adjacent to the driver. I like how with that extra folded section you have managed to increase the length of the horn and not waste any internal space.
__________________
My daughters music
http://soundcloud.com/zoey-phillips
  Reply With Quote
Old 24th July 2010, 03:31 PM   #7
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Nice work!
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 24th July 2010, 04:40 PM   #8
iand is offline iand  United Kingdom
diyAudio Member
 
Join Date: Feb 2007
Location: London
Quote:
Originally Posted by chris661 View Post
Nice work!
Going by the Hornresp plot I'd have said the LF15G410 was short of Xmax (8.5mm) for 800W handling -- there are numerous 15" drivers with similar T-S parameters but bigger Xmax (BMS, Ciare, Beyma, Faital Pro...) which would handle considerably more power.

Of course they could also be more expensive, or just not model as well in a tapped horn...

Ian
  Reply With Quote
Old 24th July 2010, 05:40 PM   #9
diyAudio Member
 
Join Date: Sep 2008
Made two TH using the same driver. Worked out really well.

I have never run more than 400W peak RMS through it (limited with DCX2496) bumped it down to 200W as I really didn't need every light and ventilation to vibrate.

Mine where slightly higher tuned but are 233L external volume. 102-103dB 2,83V (around 1W) IIRC.

So I can imagine what yous can do.
  Reply With Quote
Old 24th July 2010, 09:39 PM   #10
iand is offline iand  United Kingdom
diyAudio Member
 
Join Date: Feb 2007
Location: London
Quote:
Originally Posted by David_Web View Post
Made two TH using the same driver. Worked out really well.

I have never run more than 400W peak RMS through it (limited with DCX2496) bumped it down to 200W as I really didn't need every light and ventilation to vibrate.

Mine where slightly higher tuned but are 233L external volume. 102-103dB 2,83V (around 1W) IIRC.

So I can imagine what yous can do.
At 400W the RCF driver would be fine.

If you follow the usual recommendation (for PA) of an amp with a power output of double the continuous driver rating (to allow for music crest factors) the BMS15N850 is the only 15" driver I've found that can handle anywhere near this without running out of Xmax (16mm using the usual formula).

Ian
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
TH-Micro - a 6,5" tapped horn martinsson Subwoofers 28 21st September 2013 10:37 AM
Dual 8" tapped horn = TH-SPUD geitmans Subwoofers 119 1st January 2012 08:14 PM
Tapped Horn for 18" bass angeloitacare Subwoofers 14 28th March 2009 07:37 AM


New To Site? Need Help?

All times are GMT. The time now is 10:39 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2