full range without filtres - Page 3 - 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 10th December 2005, 12:14 AM   #21
scottw is offline scottw  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Kalifornia
Thanks for that.
Actually it's lyrics from an old Blind Blake(Arthur Blake) song 'Ditty Wha Ditty' that was covered by Ry Cooder in the '70's on "Paradise and Lunch". I had to go dig it out and get it spinnin'.

scottw
__________________
"The Adobe Updater must update itself before it can check for updates. Would you like to update the Adobe Updater now?"
-Adobe Updater
  Reply With Quote
Old 10th December 2005, 08:51 AM   #22
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
I liked Bop 'Till You Drop' myself, though that early digital recording is a bit harsh... ;-)
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 11th December 2005, 07:15 AM   #23
diyAudio Member
 
Artmaster's Avatar
 
Join Date: May 2004
Location: Kiev
Blog Entries: 1
Send a message via ICQ to Artmaster Send a message via MSN to Artmaster
well gentlemen! thank you for discuss.
but do you agree, ANY solution have to work? I have a lot of it. very differing, for any different tastes.
and now I want to bring about fullrange 2 way loudspeaker, including active part - 30-80 Hz.

dear Scottmoose, what should be with F200A into small sealed box? 25 litres. it's has Q<then 60. isn't it?
what's happening should I place 2 pcs F200A over there? Vas don't=2*Vas as well. do you agree. it's just add 1driver volume.
so, I'll get Q of this system about 0.5. what's it looks like? Bessel. acoutic filtre.

variovent just help me for tune it up. it's not realy sealed. see the difference.

1) What sort of music do you listen to? - basicaly modern jazz
2) How large is your room and what shape? - it's for not a small one.
3) Where are you intending to put the speakers? - close a corner's on front side
4) How loud do you like to listen? - ideal - the same like concert hall. 120 db enough
__________________
Artmaster live in www.artmaydan.org.ua
  Reply With Quote
Old 11th December 2005, 10:08 AM   #24
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Hi Yury

I know exactly what variovents are -I've used them in the past. What you create with them is an aperiodic enclosure, which is in practical terms a half-way point between a regular vented enclosure and a sealed box.

2 drivers in 1 enclosure? Nothing fancy about it. Sd doubles, Vas doubles, if you wire in parallel Re and Zvc halve, if you wire in series, Re and Zvc double. That's it. So if you want to use 2 drivers in an enclosure, it will need to be double the volume of an enclosure using a single driver.

Try this. 2 Fostex F200a mounted in bipolar configuration in a box of these internal dimensions: 20Cm wide x 20 cm deep x 62.5cm tall. Drivers 15.25cm down from the top, one on the front baffle, one on the rear. That'll get you down to around 80Hz, without baffle-step problems, and with circa 90db for 1w sensitivity. The subs you can sort out from there. You'll need to run them at the upper end of their range. Still not quite ideal, as you should really cross a sub over 20 db before the main drivers roll off, but it'll work. Let me reiterate though: DON'T try putting both drivers on the front panel, unless you are willing to add a small filter to one of them, just to roll it off above, say, 500Hz, which would not damage the sound quality.

Best
Scott
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 11th December 2005, 10:23 AM   #25
diyAudio Member
 
Artmaster's Avatar
 
Join Date: May 2004
Location: Kiev
Blog Entries: 1
Send a message via ICQ to Artmaster Send a message via MSN to Artmaster
Quote:
Originally posted by Scottmoose
Hi Yury

Sd doubles, Vas doublesScott

!!!!!????? it's wrong!
Vas is not doubles. i's just add driver volume.
__________________
Artmaster live in www.artmaydan.org.ua
  Reply With Quote
Old 11th December 2005, 10:48 AM   #26
gamma is offline gamma  Sweden
diyAudio Member
 
Join Date: Jun 2005
Location: Jönköping
Yuri: It´s not wrong.
  Reply With Quote
Old 11th December 2005, 12:14 PM   #27
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Sorry Yuri: it's not wrong.

If you choose not to believe me, then go to Martin J. king's site at www.quarter-wave.com and take a good long read of his article on modelling two drivers in one enclosure.

Also read the loudspeaker design cookbook, which details the exact same method. One which I and many others have used for quite some time, both in theory, modelling drivers in MathCad for various enclosure tyopes, sealed, vented, double-bass reflex and TLs of all their different kinds, and in practice, in building enclosures.

Scott
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 11th December 2005, 03:01 PM   #28
diyAudio Member
 
Artmaster's Avatar
 
Join Date: May 2004
Location: Kiev
Blog Entries: 1
Send a message via ICQ to Artmaster Send a message via MSN to Artmaster
ok. try to make isobarik as well. what about Vas?
__________________
Artmaster live in www.artmaydan.org.ua
  Reply With Quote
Old 11th December 2005, 04:26 PM   #29
diyAudio Member
 
Artmaster's Avatar
 
Join Date: May 2004
Location: Kiev
Blog Entries: 1
Send a message via ICQ to Artmaster Send a message via MSN to Artmaster
oh! I'm sorry! I mean not Vas, of course I'm talikng about Vb - box capacity.
__________________
Artmaster live in www.artmaydan.org.ua
  Reply With Quote
Old 13th December 2005, 04:38 PM   #30
jsn is offline jsn  United States
diyAudio Member
 
jsn's Avatar
 
Join Date: Sep 2004
Location: The Atomic City
I would like to recommend the FF225k. It has a relatively laid back sound without the upper midrange peak of the whizzer-coned Fostexes. It does not quite get up to 20kHz, but to me that is not a big deal.

I don't see any problem using these in a small box designed to roll of around 60Hz, but I'm not sure you need 2 of them per channel. This will give you more efficiency, less cone movement, but I don;t think you will need it, and you will be sacrificing the imaging of a singla speaker. And you will have a 4 ohm load, which has it's own drawbacks.

jsn
  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
Frequency range of the human voice & full range center channel speakers jwmbro Multi-Way 31 20th January 2008 03:07 PM
5.25 full range boxcustom Full Range 0 20th March 2007 09:33 PM


New To Site? Need Help?

All times are GMT. The time now is 09:19 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