Now This is a sub! Bertha...W bin - 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 4th May 2011, 02:48 PM   #1
diyAudio Member
 
Join Date: Jan 2011
Default Now This is a sub! Bertha...W bin

I stumbled upon these renderings/plans and i am pretty darn sure that these are the subs used in the GSA system at district 36 in nyc. The bass from 4 of these on a small(ish) dance floor is unreal!! As i mentioned in another thread, this system produces the strongest bass i have ever heard! (i've been to my fair share of clubs with good systems installed)

here they are, the EAW bertha...

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
here they are in the GSA stack...
Click the image to open in full size.
Click the image to open in full size.
and im pretty sure Gary Stewart uses the crown 5002 to power each one...so with two woofers and bridged on that amp i figure about 5000rms?
Click the image to open in full size.

obviously these are permanent install only and they are not meant to be moved around at all.

Last edited by m R g S r; 4th May 2011 at 03:02 PM.
  Reply With Quote
Old 4th May 2011, 03:14 PM   #2
epa is offline epa  Netherlands
diyAudio Member
 
Join Date: Apr 2010
Location: amsterdam
this sub is a double EV TL4025 model .
ive bild 2 many years ago (single ones) verry efficient not so low .
haven't seen the extender be4.
this looks like it wil make some noise.

Last edited by epa; 4th May 2011 at 03:19 PM.
  Reply With Quote
Old 4th May 2011, 03:23 PM   #3
diyAudio Member
 
Join Date: Nov 2007
Location: Dallas
Your rendering differs from the drawing.
Missing cut aways to connect dead space to the back of the speaker?
  Reply With Quote
Old 4th May 2011, 03:34 PM   #4
diyAudio Member
 
Join Date: Jan 2011
they're not mine, they are renderings i have found from other forums.
  Reply With Quote
Old 7th May 2011, 08:33 AM   #5
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
"this sub is a double EV TL4025 model ."

The GSA box holds 18s, not 15s (like the EV box).
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 7th May 2011, 08:45 AM   #6
epa is offline epa  Netherlands
diyAudio Member
 
Join Date: Apr 2010
Location: amsterdam
Quote:
Originally Posted by djk View Post
"this sub is a double EV TL4025 model ."

The GSA box holds 18s, not 15s (like the EV box).
hmzz correct.
maybe the ev was the basis of that design.
fold is the same,but the dimension differ a bit.
  Reply With Quote
Old 7th May 2011, 05:34 PM   #7
diyAudio Member
 
Top Shelf's Avatar
 
Join Date: Apr 2010
Location: Midland, Ontario
When I was a teenager we had a school dance and there were two of the ones in the pictures center stacked. You are right they made my head rattle and my vision blur. Same effect as two Ev MTL-4's
__________________
JEREMY M_________________________________
I like it loud, BUT NOT TOO LOUD!.... Hey do you hear that high pitched ringing sound ?
  Reply With Quote
Old 7th May 2011, 07:04 PM   #8
pgolde is offline pgolde  United States
diyAudio Member
 
Join Date: Jun 2004
Location: RI
The most powerful bass I have ever heard, or feared my internal organs would explode, was 4 BDEAPS, 2 over 2 powered by a PL9 at Paul Bells club in NYC. Mark Seaton was driving and had a techno beat pumping that not one in attendance was brave enough to walk within 10 feet of. I walked the room and the bass was even throughout. Clean to 40hz at full output, first time Paul lost a bottle off the bar shelf and popped a breaker.
  Reply With Quote
Old 7th May 2011, 07:32 PM   #9
diyAudio Member
 
Join Date: Jan 2011
paul bells club? where is it? i've never heard of it...
  Reply With Quote
Old 7th May 2011, 07:36 PM   #10
diyAudio Member
 
Join Date: May 2005
Location: toronto
I worked with Richard Long in 1985. The bass box is called Bertha and the extension with a 96 x 42 inch mouth is called a Levan (after Leroy Levan). The drivers were custom made Eminince 18's - maybe some RCF 's later . There were also a few Levan's built with 120 inch x 42 inch mouths with a third bend . (I worked iwth Richard on a club called the Copa in Toronto with 4 of the 120 inch Levan's that were double stacked for a 10 foot x 84 inch mouth). Sometimes Richard made the Bertha's or EAW made some for him as well. The 10 foot mouth was only ever made by Richard - i gave him a hand in his NYC shop for a day doing the final cuts of the mouths for the Copa. The Bertha/Levans are run 20 to 100hz on an effects output with a gain and cut control on the RLA 3000

The problem with the GSA system is the phase cancellation on the 15 inch low mid box where the horn loaded back radiation meets the direct radiator 15's output. - maybe about 250 to 400Hz range ) It was better done by Richard with 2 of 2 x 15 inch fully horn load bent front loaded bass horns running 40 to 250 HZ per stack and then a 250hz crossover to the double D 2 x 12 inch horn ( RCF ) with large long phase plugs Richard called the Double Dildo before crossing to the JBL 2395's at 1200 Hz which ran full range while the 2402 JBLs ran off the RLA 3000 crossover from 7 K and up on an effects output of the RLA 3000 crossover . The second problem with the GSA's 15 inch box is they don't go down to 40 HZ which was needed for the crossover points Richard used, but they may well have thier own crossover points based on their driver choices and cabinet design.

Last edited by ticknpop; 7th May 2011 at 08:05 PM.
  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
Parts Bin SirNickity Parts 4 18th November 2010 06:05 PM
W-bin tomdred Subwoofers 1 18th March 2010 10:13 PM
Bin Design virusaudio Subwoofers 4 1st June 2007 11:51 PM
Fresh out of the Bin! impsick The Lounge 2 31st March 2007 05:20 PM
SWR Big Bertha plas abonas Multi-Way 1 11th February 2003 01:33 AM


New To Site? Need Help?

All times are GMT. The time now is 07:49 PM.


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