Electrostatic Speakers & Amp - 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 2nd July 2003, 11:16 PM   #21
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Default transparent aluminum

We call that "indium-tin oxide."
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 2nd July 2003, 11:50 PM   #22
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
Ok, so does bending the diaphram solve problems of beaming? or create more problems? Maybe it doesn't have to be a cylander...although I kinda still like that idea. How about 3 cylanders, one be like a tweeter....and the others be like mids...MTM if you will...and have the "super absorber" inside the cylanders be absorbent to those respective freqencies. More work than its worth? I don't know. I'm just talking as I'm thinking. I'm curious is all as to how to solve the problem of these ESL's "beaming". At Sheldon's page...he was showing freq graphs that got weird at even 1 or 2 degrees off axis! How about an ESL that is bent to a 1/4 cylander in the corner of the room? Just an idea. I need to read up on the subject i know...I will

-Matthew K. Olson
  Reply With Quote
Old 3rd July 2003, 12:21 AM   #23
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Corner of the room is bad for the same reason- reflections passed through the diaphragm.

Curved units have been made, with Martin Logan and Sound Lab being the best known. There are some theoretical advantages to this regarding dispersion.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 3rd July 2003, 09:28 PM   #24
diyAudio Member
 
Join Date: Sep 2002
Location: Long Island, NY
A couple of things:

1. the electrostatic kit is on ebay again (item number 3033643158).

2. Please point me to some links so I can learn more about amps, how they work & why some designs are better than others (especially for electrostatics).

Thanks again

Ralph
__________________
Probably a silly question, but ........
  Reply With Quote
Old 3rd July 2003, 09:45 PM   #25
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
2. Please point me to some links so I can learn more about amps, how they work & why some designs are better than others (especially for electrostatics).
With respect to elecrtostatics and amplifiers a logical way to go is the OTL topology, be that tubed or with semis on the output since 9/10 you'll find a step up xformer at the input of your speaker.

While OTLs are pretty straightforward using complementary semiconductors, they're certainly no bed of roses once you opt for tubes.

I've used the latter on a variety of speakers amongst which a number of ESLs without problem.YMMV.

Recommending links or books is a bit harder since I've no idea about your knowledge of electronics...at any rate I always heartily recommend the excellent Tubecad site which is both well written and not overly technical to most of us:

TUBECAD

Cheers,
__________________
Frank
  Reply With Quote
Old 4th July 2003, 02:11 AM   #26
wrl is offline wrl  United States
diyAudio Member
 
Join Date: Jan 2003
Location: USA
Correct me if I'm wrong, but I think that part of the reason ESL sound so good is because they beam.

Also, even though the Martin Logans are curved, they still have a definite sweet spot much like flat panels. IMHO, the sound is better in the sweet spot of flat panals than it is in the sweet spot of curved panels.

Also cylindar wouldn't really work I don't think since ESL's put out as much sound behind them as they do in front. The opposing diaphrams would interfear with eachother. If you used an absorbing material you will still have to deal with a "venetian blind effect."

A quote from Roger Sanders, "The ESL cookbook":

"In an attempt to duplicate a pulsating cylindar, designers build small panels and place them around the surface of an imaginary cylindar...The resulting speaker produces several discrete beams going in many directions. Unfortunately, the beams don't blend...When you move around in front of such a speaker, the high frequencies come and go as though the sound is comming through a series of slots... The image is seriously compromised."

This in addition to the excess amount of work involved makes is impractical in my opinion.

In regards to the amp of choice: I am currently about to being using a leach amp to power my panels. I'll let you know how it works out. BTW, this amp can easily be built for under 300 dollars.

Good luck,

Wes
  Reply With Quote
Old 4th July 2003, 02:15 AM   #27
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
Ok, so make a curved panel that is 1/4" round. That way sound does go in all directions owing to the fact that the esl puts out sound behind it. I know...I definitely need to read the ESL cookbook, and I will as soon as i get some $$ to buy one...etc etc. Maybe I'll end up making my own ESL too. We'll see. Thanks for the brain stimulation anyway

-Matthew K. Olson
  Reply With Quote
Old 6th July 2003, 04:04 PM   #28
diyAudio Member
 
Join Date: Sep 2002
Location: Long Island, NY
Wes,

Can you point me in the direction for info on leach amps?

Thanks,
Ralph
__________________
Probably a silly question, but ........
  Reply With Quote
Old 6th July 2003, 06:43 PM   #29
VictorG is offline VictorG  United States
diyAudio Member
 
Join Date: May 2003
Location: Albuquerque
Default Leach Amps

I am going to second what was said by Wes, these amps (at least at the stage I am at, in prossess) are easy to build and doable. On word of advice, DO NOT spend hours on the setup, buy boards, developer and etch just to make the nessesary boards yourself. I think you'll get much better and accurate results if you just constuct his board in a PCB layout design program and send the plans off to someone like pcbexpress. While the costs of having boards professionally done seems like alot, ($50), the startup costs of etching your own boards are easily double this amount. Getting these boards done proffesionally will make your life easier in the long run.

Of course, this being a DIY site, I supposed we couldn't get to mad at you if you decide to etch your own boards as I did.....

Oh, and the leach link:
http://users.ece.gatech.edu/~mleach/lowtim/

Good Luck. Employ the one hand rule.
  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
Anyone had an experience of electrostatic speakers? Test Electrix Multi-Way 1 16th March 2009 02:27 AM
Class D for electrostatic speakers koldby Class D 23 4th December 2007 04:10 PM
UCD180 & electrostatic speakers vinodk Class D 3 15th November 2005 01:04 PM
Finnish DIY electrostatic speakers peranders Multi-Way 1 25th September 2002 07:16 AM
electrostatic speakers junglejuice Planars & Exotics 3 22nd October 2001 09:32 PM


New To Site? Need Help?

All times are GMT. The time now is 06:36 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