R evenge C omes with F orce - Page 3 - 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 31st May 2011, 04:36 PM   #21
Djim is offline Djim  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Location: 'Ollanda
Quote:
Originally Posted by epa View Post
hi djim
group delay and impulse look verry good,at least in the sim.
i added a chamber to damp the out of passband peaks a bit.
still think you need a power plant to get to the max of them
I like your explanation "at least in the sim". The trouble is not the sim, but the reality of surface versus panelflex and keep everything in transportable weights. A 700liter cab is going to be quiet heavy with all extra bracing...

And since the request was 35Hz and he has only 2000W per channel it sounds more interesting to use double 18's and get more SPL from it.
  Reply With Quote
Old 31st May 2011, 04:43 PM   #22
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by Djim View Post
I like your explanation "at least in the sim". The trouble is not the sim, but the reality of surface versus panelflex and keep everything in transportable weights. A 700liter cab is going to be quiet heavy with all extra bracing...

And since the request was 35Hz and he has only 2000W per channel it sounds more interesting to use double 18's and get more SPL from it.
Which 18 do you have in mind
The rcf price is $500.00
  Reply With Quote
Old 31st May 2011, 04:54 PM   #23
Djim is offline Djim  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Location: 'Ollanda
Quote:
Originally Posted by olsound View Post
Which 18 do you have in mind
The rcf price is $500.00
Even cheap ones can beat your RCF with just 2000 watts. Like Epa said you'll need a serious power plant cause your 2Kw is just going to 'tickling' the 21"

Look for 18" (8Ohm) with an Fs of <35Hz and a AES power rating of at least 700Watt continue and Xmax of > 7mm.
Or 18" (4Ohm) with an Fs of <35Hz and a AES power rating of at least 1200 Watt continue and a Xmax of >9mm
  Reply With Quote
Old 31st May 2011, 05:45 PM   #24
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by Djim View Post
Even cheap ones can beat your RCF with just 2000 watts. Like Epa said you'll need a serious power plant cause your 2Kw is just going to 'tickling' the 21"

Look for 18" (8Ohm) with an Fs of <35Hz and a AES power rating of at least 700Watt continue and Xmax of > 7mm.
Or 18" (4Ohm) with an Fs of <35Hz and a AES power rating of at least 1200 Watt continue and a Xmax of >9mm
Thanks for the info I wil keep it in mind
In the future I will invest in a more powerful amps for the rcf.
If you want you can assist with this project your knowledge is welcome.

Last edited by olsound; 31st May 2011 at 05:52 PM.
  Reply With Quote
Old 31st May 2011, 06:01 PM   #25
epa is offline epa  Netherlands
diyAudio Member
 
Join Date: Apr 2010
Location: amsterdam
first ruf sketch
Click the image to open in full size.
  Reply With Quote
Old 31st May 2011, 06:18 PM   #26
Djim is offline Djim  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Location: 'Ollanda
Quote:
Originally Posted by olsound View Post
Which 18 do you have in mind. The rcf price is $500.00
Quote:
Originally Posted by olsound View Post
In the future I will invest in a more powerful amps for the rcf.
You seem to worry about 130$ difference between 2 x18"drivers over one 21" while you don't have a problem investing several hundreds to thousand$ for an heavier amp

(Ah, I see the 'Epa folding style' is returning )

Last edited by Djim; 31st May 2011 at 06:21 PM.
  Reply With Quote
Old 31st May 2011, 06:59 PM   #27
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by epa View Post
first ruf sketch
Click the image to open in full size.
That look good,anymore up your seleve

Last edited by olsound; 31st May 2011 at 07:05 PM.
  Reply With Quote
Old 31st May 2011, 08:30 PM   #28
epa is offline epa  Netherlands
diyAudio Member
 
Join Date: Apr 2010
Location: amsterdam
i have a moddeled a lot.
you sugested to go for the symetrc aproach.
if you click my nickname>find more post from epa,you wil find many more .
if you find a model that you like i can scale it up to your likings.
start here or here f.i.

Last edited by epa; 31st May 2011 at 08:36 PM.
  Reply With Quote
Old 31st May 2011, 08:40 PM   #29
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by epa View Post
first ruf sketch
Click the image to open in full size.
This one is ok
  Reply With Quote
Old 31st May 2011, 08:47 PM   #30
epa is offline epa  Netherlands
diyAudio Member
 
Join Date: Apr 2010
Location: amsterdam
i got a long free weekend coming up.
if u like this model i can work it out in detail.
how are your "skilz" ?
  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



New To Site? Need Help?

All times are GMT. The time now is 10:05 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