Jamo 23274 sub? or bass driver - 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 9th November 2011, 07:00 PM   #1
diyAudio Member
 
Join Date: Apr 2002
Location: Winnipeg Canada
Default Jamo 23274 sub? or bass driver

Hello: I just acquired these drivers; any body have any info about them?
I was told they were used in a factory passive sub about mid 1990's vintage.
The person I got them from gave me no specs except for a piece of paper stating
cabinet volume of 4 cu ft. & a crude diagram of the port & it's internal distance
from the cabinet. No info as to where to put port front or back.
I'm going to try to attach some pictures.

...................... thanks

.................. Fred petersen
Attached Images
File Type: jpg Jamo1.JPG (152.8 KB, 69 views)
File Type: jpg Jamo2.JPG (177.4 KB, 64 views)
File Type: jpg Jamo3.JPG (136.8 KB, 62 views)
__________________
fastfreddd

Last edited by Fred Petersen; 9th November 2011 at 07:05 PM. Reason: to clear up message
  Reply With Quote
Old 11th November 2011, 12:19 AM   #2
diyAudio Member
 
Join Date: Jan 2009
Quote:
Originally Posted by Fred Petersen View Post
Hello: I just acquired these drivers; any body have any info about them?...
I was told they were used in a factory passive sub about mid 1990's vintage.
The person I got them from gave me no specs except for a piece of paper stating
cabinet volume of 4 cu ft. & a crude diagram of the port & it's internal distance
from the cabinet. No info as to where to put port front or back. I'M going to try to attach some pictures. ....thanks, Fred Petersen
Hi there Fred: Since you have data for the volume of the cabinet (4cf),next, area and length of the port is critical. Please post the "crude diagram of the port" and its area and length. Generally, the port can be on the front or if some distance to the back wall is available, the port can be on the back or if the cabinet is raised on "feet" the bottom. The port (if circular)must be at least one diameter from the interior back wall. Obtaining the T/S parameters by testing, ( see partsexpress.com for the Dayton W3 speaker tester, about $99 + shipping ) is the sure way to have the data to enter into a design program and select the volume and port size and length. (such programs are available free on line)....regards, Michael
  Reply With Quote
Old 11th November 2011, 02:00 AM   #3
diyAudio Member
 
Join Date: Apr 2002
Location: Winnipeg Canada
Hello Michael:

Thanks for your reply; I'll be posting the diagram shortly.

...................... fred Petersen
__________________
fastfreddd
  Reply With Quote
Old 11th November 2011, 02:10 AM   #4
diyAudio Member
 
Join Date: Apr 2002
Location: Winnipeg Canada
Default Diagram

Here's the diagram
Attached Images
File Type: jpg Jamo.JPG (105.2 KB, 47 views)
__________________
fastfreddd
  Reply With Quote
Old 12th November 2011, 04:18 AM   #5
diyAudio Member
 
Join Date: Jan 2009
Hi there ZD: My interpretation of the drawing is a 4-inch diameter port, 5.75-inches long located in the front of the cabinet with the dimension from the outside of the front panel to the inside of the back panel 14-inches. The back panel to be covered with 2-inches of fiberglass (pink stuff). Along with the back, one side and either the top or botom of the enclosure needs to be covered with fiberglass. Given your stated objectives, a 4 cubic foot (internal measurements minus: any bracing,cleats, port tube volume, driver displacement) should work. The minimum tube to back dimension is 4".
....regards, Michael
  Reply With Quote
Old 12th November 2011, 04:48 AM   #6
diyAudio Member
 
Join Date: Apr 2002
Location: Winnipeg Canada
Hello Michael: Thanks for your reply I appreciate your time on this issue.
Do you or any body=else have any idea which Jamo product line used this driver or how to find out that fact?
__________________
fastfreddd
  Reply With Quote
Old 13th November 2011, 04:57 AM   #7
diyAudio Member
 
Join Date: Jan 2009
Hi there Fred: I Googled-up Jamo sprakers and found the folloing models:
1985: PP300, 1986: CBR 120 speaker, 1987: Compact 120 speaker, 1989: Concert II, there was also a recent long site on a 909 model, however it is not a box speaker: open back model with twin 15-inchers/mid range/tweeter, a good read never the less!
...regards, Michael
  Reply With Quote
Old 13th November 2011, 08:04 PM   #8
diyAudio Member
 
revboden's Avatar
 
Join Date: Feb 2011
the dimensions on the pic would give a port tuning of 33Hz and 3.78ft^3 of working volume. ie a woofer.
  Reply With Quote
Old 13th November 2011, 09:42 PM   #9
diyAudio Member
 
Join Date: Apr 2002
Location: Winnipeg Canada
thank you very much revboden that pretty much answers my question.
I'm going to go ahead and build boxes for these drivers.
I'll post pics when finished.
Also thanks to everyone who sent responses to this thread.

.................... Fred Petersen
__________________
fastfreddd
  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
What Bass/Mid-bass driver for me? timreeves Multi-Way 4 17th March 2011 12:09 AM
Best driver for Mid Bass SETorbust Multi-Way 6 26th February 2011 05:57 PM
Best fullrange driver for bass extremis Full Range 60 16th May 2008 07:39 PM
bass amp and driver leander Solid State 4 3rd November 2005 12:53 PM
Getting the most bass out of a driver BAM Multi-Way 7 5th September 2002 04:43 AM


New To Site? Need Help?

All times are GMT. The time now is 01:19 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