Olson S-311 - 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 26th August 2006, 12:00 PM   #1
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
Default Olson S-311

I have pair of Olson S-311 speakers and don't know the schema uses for, please help me... Thanks so much.
  Reply With Quote
Old 28th August 2006, 02:52 AM   #2
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
Can I use the schema of "Onken Petite" for this driver? Please consultative something... Thanks
  Reply With Quote
Old 28th August 2006, 04:14 AM   #3
GM is online now GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

With no specs, not even what its Fs is or an Olson recommended cab size, your guess is as good as anybody's.

Anyway, you'll need a cab with easy tuning flexibility, so I don't recommend building the Onken.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 28th August 2006, 05:51 AM   #4
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
"...so I don't recommend building the Onken..."

Could you guide me clearly? Now I need a schema for Olson S-311 drivers. What can I use if not the Onken?
  Reply With Quote
Old 30th August 2006, 03:04 AM   #5
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
Can I use this cabinets?
Attached Images
File Type: jpg varo12_01.jpg (28.2 KB, 209 views)
  Reply With Quote
Old 30th August 2006, 03:05 AM   #6
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
and the back of cab...
Attached Images
File Type: jpg varo12_02.jpg (17.4 KB, 204 views)
  Reply With Quote
Old 30th August 2006, 11:39 PM   #7
GM is online now GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally posted by huymdt
"...so I don't recommend building the Onken..."

Could you guide me clearly? Now I need a schema for Olson S-311 drivers. What can I use if not the Onken?
Greets!

Like I said, without any info I can't really help much, I just know that if it doesn't sound good in the Onken, it's not a user friendly cab for tweaking beyond stuffing the vents to roll off any 'boominess'.

WRT what appears to be a crude '50s era BLH cab in the pics, don't have a clue. Only one way to know for sure though without specs.

Really, for max performance you need to either measure them or have a local electronics repair shop/whatever do it, then get back to us. Otherwise the only suggestion I can make is to use this pre-T/S bass reflex rule-of-thumb for what was considered an optimum box volume (Vb) for a given effective piston area (Sd) where the port area (Ap) = Sd:

Vb = 2000R

where:

R = SQRT(Sd/pi)

Since a typical 12" has a ~78"^2 Sd, or ~4.983" radius:

Vb = 2000*4.983 = 9966"^3 = ~5.7674 ft^3

If it's tuned too high, reducing Ap to 1/4 will tune it ~1/2 octave lower and 1 octave if reduced to 1/16th, but it may 'chuff' enough to be audible on some music/movies at this size, though some vent damping will cure it.

As for shape, a tower design (aka MLTL) to get the driver up to near/at ear height, keep the footprint reasonable and construction simple is my preference:

L = ~57.06"
CSA (w x d) = ~174.68"^2 (I recommend ~16.82" w x 10.39" d)
driver down ~21.93" from top
vent near/at the bottom

All dims are inside (i.d.) and since you'll probably want to experiment with making the vent smaller, putting it on the rear seems best. Initially, just line the top, one side and back about 2/3 the way down with 1" fiberglass insulation.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 2nd September 2006, 09:41 AM   #8
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
Thanks GM,

On your instruction, I imagine the cabinet with 27.93"(H) x 16.82"(W) x 10.39" (D) and driver space from top about 6", with vent near the bottom... This is the first project for cab and difficult without specs. Thanks so much for your recommend.

Huymdt
  Reply With Quote
Old 3rd September 2006, 06:29 AM   #9
GM is online now GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

You're welcome!

?? Finished, this will be a ~5 ft tall speaker to take advantage of some 1/4 WL pipe loading and minimize its 'footprint', with L = length = height = ~57.06" and the driver is down from the top ~21.93", or ~35.13" up from the bottom if you prefer to view it this way. Again, these are inside dims. Obviously, if you have small children or pets big enough to tip them over a suitable base will be required.

There's been numerous posts WRT the pros and cons of different construction materials and bracing preferences, so a search should give you enough to decide what will probably work best for you.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 6th September 2006, 04:41 AM   #10
huymdt is offline huymdt  United Kingdom
diyAudio Member
 
Join Date: Oct 2005
Greets!

Oh, I'm mistake about size... fortunately, I'm not free to perform this cab. With the 57.06"(H) x 16.82"(W) x 10.39"(D) (and driver down from top 21.93"), it's bulky plaything in my house

Thanks for your support,
Huymdt
  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
12 inch Teledyne/Olson FS transaluminum Swap Meet 0 27th July 2009 11:00 PM
H. Olson's amps Zen Mod Tubes / Valves 3 21st May 2007 12:40 PM
Where's Lynn Olson's Ariel Website gone? tcpip Multi-Way 3 20th June 2004 07:56 AM
Lynn Olson's web site: AWOL? Kashmire Tubes / Valves 1 20th December 2003 04:41 PM
Lynn Olson's ME2 Bas Horneman Multi-Way 16 25th October 2002 03:01 PM


New To Site? Need Help?

All times are GMT. The time now is 03:11 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