Floorstand, 2 way, very low crossover(+with waveguide) - Page 3 - 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 3rd October 2005, 08:24 AM   #21
azrix is offline azrix  United States
diyAudio Member
 
Join Date: Oct 2004
Quote:
Originally posted by mgoedeke
Why not go with a device which will actually work properly in a wavegudie in the first place? If the taxes are only so high for Europe, Bulgaria produces some quality comrpession drivers, BMS amongst them where Seas et al will have no chance against on a waveguide.
There's nothing wrong with using regular tweeters in a waveguide. The big problem that I see is mounting a dome tweeter to a horn designed for a compression driver. As, you can see, the ways to do this are all a bit of a hack. Nothing wrong with using compression drivers either. Though, they generally are not designed for the same qualities many people look for in 'hifi'.

Quote:
Originally posted by bg40403
I agree here. Let's do it in spite of this. I can make your waveguides on my lathe. I can also shape the 30 ppi foam "refractive phase plug". You may have an alternate approach.

See my thread: Acoustic Waveguide
for formulas. There needs to be a routine developed that will plot full scale profiles from entered data: throat size, cut-off frequency, desired transition radius from waveguide to baffle, etc. Once the profile is graphically described we can get on to making them.
Well, don't let me stop anyone. I was just trying to point out that it's not as easy as it might appear. You have an easier way to make or cut a waveguide? You've got me intrigued.
  Reply With Quote
Old 3rd October 2005, 09:28 AM   #22
diyAudio Member
 
Join Date: Jan 2002
Location: Pretoria, South Africa
Quote:
There's nothing wrong with using regular tweeters in a waveguide. The big problem that I see is mounting a dome tweeter to a horn designed for a compression driver. As, you can see, the ways to do this are all a bit of a hack. Nothing wrong with using compression drivers either. Though, they generally are not designed for the same qualities many people look for in 'hifi'.
A dome tweeter will in most cases fall short on the potential of a waveguide because it is not likely to produce a sufficiently well defined wavefront at the throat resulting in HOM and not have sufficient clean output potential for my liking (Though I'll admit that I am a fan of Prosound type cone drivers)

How many compression drivers have you heard that fell short on your expectations on a waveguide? The waveguide/horn itself is the biggest contributor to the sound (Because of the mouth reflections and HOM) and the limitation with OS Waveguides is generally thought to be the device at the small end. There are quite a couple of very nice comps available thesedays and personally after I took the dip have never looked back on dome tweeters.
  Reply With Quote
Old 3rd October 2005, 07:13 PM   #23
Hennie is offline Hennie  South Africa
diyAudio Member
 
Join Date: Nov 2004
Location: Pretoria
In my perception the biggest problem with a dome is the poor bottom end. A dome strains pretty quickly. Adding a waveguide will certainly improve matters. Those that have tried it seemed to be enthusiastic about it and I suspect it is because the waveguide reduces distortion at the lower end of the range. Lower excursion probably gives less spectral contamination overall. Of course HOM's will be an added problem, but the overall result may be an improvement.

But I support Martin's position about domes vs compression drivers. I'm done with domes. For a punchy and dynamic sound I would go for a 12" (at least) HE midbass and compression driver / waveguide. That is if space is not a limitation.

BTW I have listened to Martin's system some time ago. The typical glare that I associate with a dome trying to reproduce material with a wide dynamic range just was not there. Keep in mind that he used fairly low cost drivers and no waveguide yet. The bass was great too. I'm not accustomed to hear that level of articulation from 6.5" and 8" LE drivers.

Martin if you are reading this, hope we can talk waveguides again soon. I've just been busier than originally anticipated.
  Reply With Quote
Old 3rd October 2005, 07:36 PM   #24
diyAudio Member
 
Join Date: Jan 2002
Location: Pretoria, South Africa
Hi Hennie: but of course. Will send you a mail. I have been stuck in Pietermaritzburg of all places...

[OT]

The reason why a dome is louder on a waveguide is very simple: directivity.

My PA doesn't sound too shabby in the home heh? It is however reasonably compromized, but the next system will be a home-design, 12" + 1" or 1.4" (2-part waveguide) (argh, I wanted to get rid of the old stuff on the shelf in a conventional 3-way set first, but what the heck) I have a couple of Ideas that might fit into my budget and look, well, different.
  Reply With Quote
Old 4th October 2005, 05:09 AM   #25
diyAudio Member
 
Join Date: Jun 2005
Location: Bucharest
First I want to thank you all for posting your opininons!
Thank you bg40403 for sending me your topic adress!



I can't use a 12" because I can't build a large volumed box!
I want something around 40-45L!
An 8" would probably do the job in such a small box!

CA22RNX needs very large boxes ~100L!
So isn't suited for the job!
Any other suggestions?
  Reply With Quote
Old 4th October 2005, 10:36 PM   #26
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
My fascination with waveguides began when I saw examples of Amphion and other speakers which included waveguides. I'm already an idiot for making speakers, which my wife calls my "toys"
Quote:
Posted by asrix: You have an easier way to make or cut a waveguide? You've got me intrigued.
I have stacked layers of mdf for mounting on my wood lathe to turn. I'm able to work to tolerances measured in thousandths, which exceed the seasonal stability of hardwood. Maintaining tolerances this close requires a more homogenous material such as baltic birch, apple ply, a complex stacked lamination and/or to a lesser degree, mdf

An alternate to making the waveguide would be the reverse form, so that multiples of a profile could be made indefinitely.

I can use the formulas to calculate a profile longhand. What I need ( Scratch that...what is needed for all of us who are interested ) is a routine to plot the profile full scale in some readily available software... Excel, maybe?
With that we could get on to considering the other compromises that may be a part of this type of construct.

I hope what shows through is my conviction that this is worthwhile and I need some help to push it along.
  Reply With Quote
Old 5th October 2005, 02:59 PM   #27
azrix is offline azrix  United States
diyAudio Member
 
Join Date: Oct 2004
Quote:
Originally posted by bg40403
I have stacked layers of mdf for mounting on my wood lathe to turn. I'm able to work to tolerances measured in thousandths, which exceed the seasonal stability of hardwood. Maintaining tolerances this close requires a more homogenous material such as baltic birch, apple ply, a complex stacked lamination and/or to a lesser degree, mdf
Of course. I realized after I posted that it was probably very similiar to how Duevel makes their "horns": http://www.cd-konzert.de/details/E-speaker-built.html . Sounds like it is very similiar.
  Reply With Quote
Old 5th October 2005, 03:11 PM   #28
JoshK is offline JoshK  Canada
diyAudio Member
 
Join Date: May 2004
Location: Toronto, ON
I am planning to use waveguides on my Arvo Pärts dipoles. Inspired by none other than AJ. I have both the steel sound and MCM waveguides and plan to use the Seas H1212. I'd be interested in anything you come up with Ed.

Could you be bribed to make one extra pair of waveguides on your lathe for lil ol' me?
  Reply With Quote
Old 5th October 2005, 09:46 PM   #29
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
Quote:
Posted by JoshK: Could you be bribed to make one extra pair of waveguides on your lathe for lil ol' me?
Yes, now that we've established I can be bought......

enable your link...or e-mail me
  Reply With Quote
Old 5th October 2005, 11:30 PM   #30
JoshK is offline JoshK  Canada
diyAudio Member
 
Join Date: May 2004
Location: Toronto, ON
YGM,

Aren't we all able to be bought? :rotflmao:
  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
Understanding the Zaph Waveguide TMM crossover diagram mikan Multi-Way 35 4th May 2009 05:44 PM
3 way Floorstand Design Ceri Multi-Way 24 31st December 2008 05:44 PM
Finished the John Krutke SEAS All Metal System (floorstand version) tktran Multi-Way 0 11th July 2005 03:45 AM
sell B&W DM305 floorstand speakers up4 Swap Meet 1 30th October 2003 02:59 PM


New To Site? Need Help?

All times are GMT. The time now is 07:56 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