Reviving the Onken - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 21st September 2008, 07:37 AM   #1
jonjin is offline jonjin  United Kingdom
diyAudio Member
 
Join Date: Feb 2008
Default Reviving the Onken

Hiya,

Newbie here and I wanted to get some thoughts on my first DIY horn project (thinking I might be biting off more than I can chew). The idea is to revive the Onken design of the 80s. So it's going to use the classic configuration:

Altec 414 in Onken cabinet
Onken 500 in LeCleach horn (550 Azurahorn)
JBL 2405

Was thinking of sticking to the recommended cross-over points of 800 Hz and 8000Hz, 2nd order Butterworth slope...

Any comments appreciated! I'm no techie...

Rgds,

JJ
  Reply With Quote
Old 21st September 2008, 04:49 PM   #2
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Go for it!

There has been a lot written about the Onken box on these pages - but you are not trying unknown drivers, so you should have no problems.

The only tricky part will be the crossover. I remember them all as being 2nd order passive with about the x-over points you mention. Tweaking the x-over slopes and phase will be where the system really comes together.

Have fun with the project - the results will be well worth it.
__________________
Take the Speaker Voltage Test!
  Reply With Quote
Old 21st September 2008, 05:10 PM   #3
jonjin is offline jonjin  United Kingdom
diyAudio Member
 
Join Date: Feb 2008
Thanks. This is abit like stepping into the unknown for me... scary but exciting at the same time.

Am waiting for the arrival of the various bits/drivers and then will start on making the Onken cabinet. After that I will definitely need the advice from here for the x-overs

JJ
  Reply With Quote
Old 21st September 2008, 06:11 PM   #4
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
I finished mine about 2 yrs ago and have spent a little time tweaking the X-O design.

Mine used the Iconic 165-8G aka Great Plains Audio 515-8G with JBL 4333 mid horns and 2402 annular ring horn tweeters.

Cross over is at 800Hz and 8kHz and I am very pleased with the results. They are completely competitive with anything I have heard to relatively obscene price levels, and like you I had the distinct feeling I was biting off a bit more than I could chew, but success is its own reward..

My latest X-O design is posted in one of the old Onken threads and works well in my set up, still you might consider designing your own. (This X-O is designed to be driven by an amplifier with an ~3 ohm source impedance.)

Here is that thread: Using JBL 4333 and 2402 (Crossing Over, etc. Sanity Check)

Here is the thread where my Onkens come to life, there are even pictures:
Onken Enclosures

Knowing what I now know and given the many hours of listening pleasure these speakers have given me I would do it all over again in a heartbeat if I had to.

The improved x-o in the other thread cited made a significant improvement in every way. I haven't changed anything else - there hasn't been any need.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 21st September 2008, 07:38 PM   #5
jonjin is offline jonjin  United Kingdom
diyAudio Member
 
Join Date: Feb 2008
Yup... your threads gave me the inspiration to embark on this project. Plus, I like the sound of Onken
Will have to carefully reread those threads.

JJ
  Reply With Quote
Old 23rd September 2008, 03:08 AM   #6
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
You've got a great start with the drivers, horns and cabinets. It's all in x-over now!
__________________
Take the Speaker Voltage Test!
  Reply With Quote
Old 29th September 2008, 02:58 AM   #7
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Here is something to motivate you a bit (hopefully)...

I got a new camera (to me) so I thought I would post a slightly better picture of the cabinet, and some other details to follow.
Attached Images
File Type: jpg onken_resized.jpg (83.8 KB, 3610 views)
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 29th September 2008, 02:59 AM   #8
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Next:
Attached Images
File Type: jpg onken_top_resized.jpg (59.2 KB, 3361 views)
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 29th September 2008, 03:03 AM   #9
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
And finally the second version of the X-O, note the really large inductor which is in the woofer LF section of the X-O, this was needed to minimize the dcr of the inductor to maintain proper woofer damping and not for power handling..

All of the other inductors are air core and all are from Madisound. The capacitors are Clarity Cap SA type, and represent a lot of performance for the money. (I've tried a number of different caps in this evolving X-O and these are the best so far, good enough that I have no motivation to spend more..)
Attached Images
File Type: jpg onken_x-o_resized.jpg (62.3 KB, 3326 views)
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 29th September 2008, 03:07 AM   #10
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Nice looking crossover, Kevin. =)
__________________
Take the Speaker Voltage Test!
  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
Onken, anyone? cyclotronguy Multi-Way 155 28th May 2009 05:22 AM
Reviving a Luxman pd277 Danas Analogue Source 3 22nd January 2009 07:58 PM
altec A7 - ONKEN sigurd Multi-Way 5 20th February 2008 07:32 PM


New To Site? Need Help?

All times are GMT. The time now is 03:02 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