Frugal Super-Tweeter - 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 10th July 2011, 02:20 PM   #11
Toppsy is offline Toppsy  United Kingdom
diyAudio Member
 
Join Date: Apr 2009
Location: Lancashire, England
When I asked my mate Chris for some feedback on how he was getting on with these tweeters, I got this reply. He is using these tweeters mounted atop his Mark Audio CHP70 Frugal Horn Mk3 speakers:

Quote:
Broad grin isn't in it

In the time I've had listening to the FH3s with the CHP-70, I have come to the conclusion that for all that the CHP-70s are doing right, they are a little bit warm and cuddly at the high end of things - top end extension could do with a helping hand.

What these supertweets do do is redress the tonal balance with beautifully clean, non agressive top end sparkle.
This in turn, to quote a well known tea advert "allows t'flavour to flood out".
Bass has improved definition, and is seemingly deeper as well.
Rhythms are coming across better too.

The improvements are also not at the expense of that wonderful midband communication that the CHP-70 has - that is still very much there.

All in all I'm one very happy bunny Very Happy
_________________
Chris
I'd call that a result
  Reply With Quote
Old 10th July 2011, 03:23 PM   #12
diyAudio Member
 
Join Date: May 2009
Location: Seattle, WA
Good work, Toppsy! To be fair, this design could no doubt be duplicated with a variety of tweeters, no?
__________________
Then again, what do I know?
  Reply With Quote
Old 10th July 2011, 03:39 PM   #13
diyAudio Member
 
DYNABLASTERTUNERS's Avatar
 
Join Date: Nov 2009
Location: Cyberia
Quote:
Originally Posted by Toppsy View Post



The simple 'Frugal' ST design was inspired by the likes of the Fostex T90A etc. as a cheap alternative add on top mount tweeter. So are you saying these are also flawed?
according to the Article in the Link I've posted- yes

Mann chill, I really didn't meant to bother you, I just want to know/learn some things, that's why I've asked and not claimed
__________________
some of my Designs www.dynablaster.deviantart.com/gallery

Last edited by DYNABLASTERTUNERS; 10th July 2011 at 04:07 PM.
  Reply With Quote
Old 10th July 2011, 04:16 PM   #14
Toppsy is offline Toppsy  United Kingdom
diyAudio Member
 
Join Date: Apr 2009
Location: Lancashire, England
chazdrumzalot wrote:
Quote:
........To be fair, this design could no doubt be duplicated with a variety of tweeters, no?
Yes it could provided the FR was extended sufficiently and the rear of the tweeter is hermetically sealed . A lot of tweeters out there only go up to 20KHz. To me for it to be called a supertweeter it must have a usable FR up to 30KHz or beyond.

Where the MA Tweeter #3 scores is both on price and usable extended FR and the fact it is a sealed design, so none of the sound is reflected back into the cabinet with all sound radiated forward. Hence the tube or box for the Tweeter serves no other purpose than to house the L-Pad resistors and the high pass(?) filter cap.

DYNABLASTERTUNERS You are not 'bothering' me. As I see things with a hermetically sealed tweeter none of the sound will be radiated back into the 'cabinet' it is all radiated outwards. So to me the cabinet shape - in this case a simple sealed tube - has no affect on the difraction. However, I could be wrong and I am sure more knowledgable members might wish to add their opinions.

Last edited by Toppsy; 10th July 2011 at 04:21 PM. Reason: amended text
  Reply With Quote
Old 10th July 2011, 04:17 PM   #15
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Quote:
Originally Posted by DYNABLASTERTUNERS View Post
according to the Article in the Link I've posted- yes
I fear you haven't appreciated the fact that the Fostex T90a et al are horn loaded.
  Reply With Quote
Old 10th July 2011, 04:25 PM   #16
Toppsy is offline Toppsy  United Kingdom
diyAudio Member
 
Join Date: Apr 2009
Location: Lancashire, England
Scottmoose wrote
Quote:
I fear you haven't appreciated the fact that the Fostex T90a et al are horn loaded.
Ah! I should have picked up on that Scott. However, using a simple sealed tube with the Tweeter#3 which is a rear hermetically sealed design, the tweeter housing should have no affect on difraction or any other radiated sound issues, yes?
  Reply With Quote
Old 10th July 2011, 04:27 PM   #17
diyAudio Member
 
DYNABLASTERTUNERS's Avatar
 
Join Date: Nov 2009
Location: Cyberia
I tought that the Article is about outter shape of the cabinet and not the inner shape?! lol
__________________
some of my Designs www.dynablaster.deviantart.com/gallery
  Reply With Quote
Old 10th July 2011, 04:33 PM   #18
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
diffraction is on the outside
edges mostly
the closer to diaphragm, the worse it is

faceplate is rounded, close to dome surround
so that is taken care of nicely
next are your mounting screws
but not many care about those, even when it does matter
third is your faceplate edge
might have been nice to have a rounding there too
but may not matter that much

I haven't read the article mentioned, but I'm quite sure it concerns upper midrange mostly
  Reply With Quote
Old 10th July 2011, 05:32 PM   #19
diyAudio Member
 
Bob Brines's Avatar
 
Join Date: Jan 2003
Location: Hot Spring Village AR
The point that dynablaster is trying to make is still unanswered. The diffraction that he is addressing is baffle step diffraction. As long as the operating frequency of the tweeter is high enough that 1/2 wavelength is shorter that the width of the tweeter faceplate, baffle step won't occur and Olsen's drawing do not apply. Edge diffraction is an entirely different phenomenon. Since the design under consideration is a dome tweeter, the edges will be illuminated well within the operating bandwidth and will be a consideration. The horn loaded Fostex designs are directional and do not illuminate the edges.

Bob
  Reply With Quote
Old 10th July 2011, 06:07 PM   #20
diyAudio Member
 
DYNABLASTERTUNERS's Avatar
 
Join Date: Nov 2009
Location: Cyberia
Thanks!
__________________
some of my Designs www.dynablaster.deviantart.com/gallery

Last edited by DYNABLASTERTUNERS; 10th July 2011 at 06:10 PM.
  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
super tweeter help babgrip Full Range 3 20th March 2010 06:24 AM
Super tweeter lionking7 Multi-Way 2 13th May 2009 11:38 AM
Linaeum Dipole Tweeter as a Super tweeter? ktuuri Planars & Exotics 5 17th June 2008 07:52 PM
My current setup - Super frugal! bigwill Full Range 22 6th October 2005 04:21 PM
Super Tweeter Laugh Magnetar Multi-Way 18 17th September 2005 10:31 AM


New To Site? Need Help?

All times are GMT. The time now is 05:33 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