DIY Waveguide loudspeaker kit - Page 64 - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > GedLee

GedLee Home of the renown Geddes Loudspeakers

Reply
 
Thread Tools Search this Thread
Old 3rd August 2008, 11:30 PM   #631
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
Quote:
Originally posted by noah katz
Am I reading the plot correctly - - 6 dB is at about 35 deg off axis from about 3 kHz up?

Thats probably correct - its called "highly directional", but still constant with frequency.
  Reply With Quote
Old 3rd August 2008, 11:37 PM   #632
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
Quote:
Originally posted by col


I thought you mentioned that you were already getting part of the manufacturing process done in Thailand. So using good quality Thai drivers seemed to make more sense. Were the tests you did on P-Audio drivers their new range? They look very impressive from here, I hope the spec sheets are more than just an artist concept as they are a very cost effective solution here in Australia. B&C are MUCH more expensive (apart from the cheap ones that have been appearing in online auction over the last few months, which I missed out on).

If you can't get AI to "open their doors" why don't you go direct to P-Audio. Looks like they have more than enough resource to provide what you would need for R&D, they would probably fall over themselves to get you on board.

col.
I know everyone at Paudio. I know the owner personally. Sure I could get anything that I want from them. There is no shortage of low cost driver manufacturers for that matter. Paudio basically has no R&D staff. They are a rock bottom priced manufacturer with no internal expertise at all. They basically make up their data shetts, so I wouldn't trust them at all.

But I'm missing your point. The Thialand operation ran out of money and I'm not there anymore. The reasons that they didn't use Paudio are academic now. They should have - too late now.

What I pay for B&C drivers and what you pay in Australia are completly different. From here, for me, the Paudio are only a little cheaper. If I went to Asia for drivers I'd go to Boke in Guangdong. But dealing in China is not something that I am up to and, as I said before, the Asian advantage is disappearing fast.
  Reply With Quote
Old 4th August 2008, 01:29 AM   #633
col is offline col  Australia
diyAudio Member
 
col's Avatar
 
Join Date: Feb 2008
Location: Melbourne, Victoria, Australia
Quote:
I know everyone at Paudio. I know the owner personally. Sure I could get anything that I want from them. There is no shortage of low cost driver manufacturers for that matter. Paudio basically has no R&D staff. They are a rock bottom priced manufacturer with no internal expertise at all. They basically make up their data shetts, so I wouldn't trust them at all.

But I'm missing your point. The Thialand operation ran out of money and I'm not there anymore. The reasons that they didn't use Paudio are academic now. They should have - too late now.

What I pay for B&C drivers and what you pay in Australia are completly different. From here, for me, the Paudio are only a little cheaper. If I went to Asia for drivers I'd go to Boke in Guangdong. But dealing in China is not something that I am up to and, as I said before, the Asian advantage is disappearing fast.
Thats very interesting. I think you just changed my mind on my next speaker project. Wish I had bought those B&C drivers that were on ebay now, damn! My favorite Neo compression drivers are the BMS4540ND but importing them costs a song now. There really isn't much choice here. Oh well at least we still have Lorantz

col.
__________________
http://www.minirig.org.au
  Reply With Quote
Old 4th August 2008, 04:05 AM   #634
diyAudio Member
 
Join Date: Jul 2004
Location: Mountain View, CA
"its called "highly directional", but still constant with frequency."

Understood, what caught my attention was the apparently higher directivity vs. nominal, i.e. 35 deg/-6 dB instead of 45.

To me that's a good thing as it will reduce reflections from my right speaker which is only a couple of feet from the side wall, which is all glass.
__________________
-----------------------------------------
Noah
  Reply With Quote
Old 4th August 2008, 01:41 PM   #635
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
45 is the waveguides wall angle, the real directivity is never as wide as this angle.
  Reply With Quote
Old 4th August 2008, 01:42 PM   #636
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
Quote:
Originally posted by gedlee
Note the polar map below: This is just about as good as I have ever gotten. I wish that I had discovered this before.

There is a good chance that it could improve the Abbey's, but I need to build some first. Still waiting on a mold modification that was required.
The bad news here is that when I priced out this crossver change it added $20 to the cost. I cannot absorb this and hence to do this I would have to raise the price of the kit.
  Reply With Quote
Old 4th August 2008, 02:23 PM   #637
diyAudio Member
 
Join Date: Aug 2002
Location: on the prairie
Quote:
Originally posted by gedlee


The bad news here is that when I priced out this crossver change it added $20 to the cost. I cannot absorb this and hence to do this I would have to raise the price of the kit.
I for one am perfectly happy to pay the extra $20. It's a very small portion of the price and the goal (at least for me) is to get the best performance possible. Lots of folks don't blink at spending $20 on a boutique capacitor that might offer an improvement so I think $20 for a significant measured improvement is a flat out bargain.

I'm early awaiting my Abbey kits so this couldn't have come at a better time.

mike
  Reply With Quote
Old 4th August 2008, 02:51 PM   #638
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
Thanks for that input. A lot of people think that $600 (ah $620) for a kit is a lot of money, but they are comparing it something that is not comparable. The polars that I am getting for the Nathan10 are absolutely outstanding, far better than the ESP10. But the ESP10 was not fully developed. I was in the process of refining it when AI ran out of money, so it is what it was when I left. I saw the same problems in the new design that I saw in that one, but I did not see the solution until a few days ago. It was very clever, but pretty expensive - thats a 50% increase in the crossover cost.
  Reply With Quote
Old 4th August 2008, 03:01 PM   #639
diyAudio Member
 
Join Date: Aug 2002
Location: on the prairie
It will certainly be interesting to see how your new configuration will work on the Abbey's.
  Reply With Quote
Old 4th August 2008, 03:30 PM   #640
gedlee is offline gedlee  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Novi, Michigan
The Abbey12 didn't have this same problem so I am not sure that it would have the same effect.
  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



New To Site? Need Help?

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