Wide version of Classic GR dMar-Ken7.3 - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 30th October 2011, 11:54 PM   #11
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally Posted by soren5 View Post
The slim version with 18mm panels has a port length of 173mm (page 2).
18mm not done yet and slipped into that doc by mistake. That page should be the 15mm front vent.

fixed the doc... http://p10hifi.net/tlinespeakers/FAL...n73-301011.pdf

Quote:
And finally the new version on page 4 has a port length of 142mm. Aren't these port lengths supposed to be the same?
I had to do some dancing there, as the 15mm wide space is not sufficient to ignore the distance to the back wall and makes the vent a flared L-shape on the inside end. If the space was pushed to just 10mm the vent would be 167mm long, so it needs to be flared to effectively shorten it.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 31st October 2011, 10:49 AM   #12
soren5 is offline soren5  Denmark
diyAudio Member
 
Join Date: Jun 2011
Location: Copenhagen
Quote:
If the space was pushed to just 10mm the vent would be 167mm long, so it needs to be flared to effectively shorten it.
I see. Didn't realize the inside end of the vent would work as a flare. In my case though, with the vent on the rear, I guess I could also run the slot vertically parallel to the back wall, and in this way have the full 167mm length without a flare? Would this be better than the shorter flared vent? I don't get why the non-flared 10mm slot vent should be 167mm instead of 160mm though. Does the higher aspect ratio require a longer vent?

By the way, may I ask what software you use to make these plans? I like the layout.

Thanks,
Søren
  Reply With Quote
Old 31st October 2011, 11:06 AM   #13
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
132+15+15+7.07 = 167.07mm

Running vent shelf parallel to back wall would be more accurate. the shelf would need to be 138mm

VectorWorks.

dave
Attached Images
File Type: gif L-shapedVent-length.gif (6.3 KB, 272 views)
  Reply With Quote
Old 31st October 2011, 11:31 AM   #14
soren5 is offline soren5  Denmark
diyAudio Member
 
Join Date: Jun 2011
Location: Copenhagen
Thanks for the illustration. A picture is worth a thousand words

I didn't understand the numbers you said, but now I get that you're of course including the diagonal of the 90 degree turns. So if I do the vent along the back wall it would be, as you said, 138mm + (15+7.07)mm = 160.07mm.

Thanks again. Time for me to get building!
  Reply With Quote
Old 1st November 2011, 06:08 PM   #15
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by planet10 View Post
132+15+15+7.07 = 167.07mm

Running vent shelf parallel to back wall would be more accurate. the shelf would need to be 138mm

VectorWorks.

dave



not that 2mm would likely make a huge difference, but 2+7 = 7?
__________________
now on sabbatical
  Reply With Quote
Old 1st November 2011, 07:50 PM   #16
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Just too much going on

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 26th November 2011, 02:39 PM   #17
soren5 is offline soren5  Denmark
diyAudio Member
 
Join Date: Jun 2011
Location: Copenhagen
Hi Dave,

I had some wood cut up in a shop, but as they didn't charge me for each cut, I decided to have the whole board cut in panels matching the CGR cabinets. In total I now have enough to make three sets of speakers

I'm now thinking of getting a pairs of Mark's CHR-70.3 drivers too. Could I put these in to the same enclosure? I haven't build the cabs yet so I could adjust the vent length if that would be needed, but I'd prefer to keep all other dimensions the same. WinISD gives a smooth frequency response if I make the vent 1-2 cm longer compared to your CGR dMar-Ken7.3 design.

What's your thoughts on this?

Thanks,
Søren
  Reply With Quote
Old 26th November 2011, 09:23 PM   #18
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
CHR70s, A7, new CHP, CHBW, & the FF125wk all fit into the same CGR with only changes in the venting. You can see what i did by referring to the designs posted in the Mark Audio box library at p10-hifi. If they aren't there poke me and i'll remedy that.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 27th November 2011, 09:36 AM   #19
soren5 is offline soren5  Denmark
diyAudio Member
 
Join Date: Jun 2011
Location: Copenhagen
Quote:
Originally Posted by planet10 View Post
If they aren't there poke me and i'll remedy that.
Maybe I'm not looking the right place, but in the MA box library I only find three CGR plans: Mar-Ken7, 7.3, and 10.2.
  Reply With Quote
Old 27th November 2011, 10:20 AM   #20
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Thanx for the poke... they are up now.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  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
New Bookshelf Cabinet for Wide & Slim Classic GR dCHR-Ken70 Musik007 Twin Audio 59 18th February 2014 04:44 PM
Classic GR Mar-Ken10.2 2b1 kenix Full Range 7 28th July 2011 03:21 AM
Bamboo dMar-Ken7 enclosures for Alpair 7, more... planet10 Swap Meet 0 27th July 2011 12:50 AM
2SJ109 and 2SJ74 in GR version??? carlomar Pass Labs 16 28th March 2010 10:20 AM


New To Site? Need Help?

All times are GMT. The time now is 07:04 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