Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Planars & Exotics ESL's, planars, and alternative technologies

Electrostatic Boombox
Electrostatic Boombox
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 21st June 2017, 10:38 AM   #1
janosch simon is offline janosch simon  Germany
diyAudio Member
 
Join Date: Jun 2017
Lightbulb Electrostatic Boombox

Hey there my name is janosch simon i love diy stuff and over at head-fi i started my electrostatic headphone project :-) and since i started with esl im intrigued by a boombox with electrostats just like the BenQ treVolo Wireless Bluetooth Portable Electrostatic Speaker | BenQ Global but with better bass :-)
and perhabs curved panels hmmm.

has any of you tried something similar? i need to start from ground but i think this could be an very exciting project
here is the stuff i need to do research on:
-curved ESL
-subwoover
-crossover
-amp
-case
-controller/player (guess i will use raspberry and volumio)

cheers janosch
  Reply With Quote
Old 6th July 2017, 09:49 PM   #2
Andersonix is offline Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Electrostatic Boombox
Thanks for bringing this new tiny ~$300 ESL to our attention.
Seems its main problem is it can't play loud enough without DSP compression kicking in, and the midwoofers are not good enough....?
Here's what it looks like.
Attached Images
File Type: jpg BenQ trevolo esl.jpg (123.0 KB, 256 views)
  Reply With Quote
Old 6th July 2017, 10:26 PM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Electrostatic Boombox
I think small single ended electrostatic tweeters would be fairly easy for a skilled diyer to make - see some old Zenith and GE radios (must be some in Europe too) for inspiration.

HV could come from an inexpensive HV switcher commonly available on eBay.
__________________
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
  Reply With Quote
Old 7th July 2017, 05:33 AM   #4
janosch simon is offline janosch simon  Germany
diyAudio Member
 
Join Date: Jun 2017
hey there my diy elecostatic headphones turn out stunning :-) so the mids and highs are even with my prototyp amazing! but the bass is so lala :-) questions is if i then try to build a hybrid with a classic woofer and the esl panel for mids and highs. what size of a woofer would you suggest and what typ of case?

cheers janosch
  Reply With Quote
Old 21st November 2017, 08:06 AM   #5
owenhamburg is offline owenhamburg  Germany
diyAudio Member
 
Join Date: Oct 2009
Location: Hamburg
I would suggest thinking of the ESL as the tweeter.
Every time you aim for an octave higher FS for the electrostatic, you can either double the volume (3Db), or shrink the ESL to half the size, or half the size of the diaphragm stator spacing, allowing you to lower the voltages by at least half, maybe 4 times.

Considering cheap transformers usually go to a max of 230 V lowering the voltage saves a lot of cost.
Sedlbauer, RSO-826006
by Sedlbauer
Be the first to review this item
Our Price: EUR 21.25 + EUR 1.50 for Shipment to Germany

I would target about 1000V across the stators, using as many 6V
Target at the absolute lowest frequency about 500 Hz as the lowest frequency signal sent to the ESL tweeters transformer, so you will want no ringing in the Bass unit up at least up to about 5KHz, even with 24db filters.
Dont bother DIY curved ESL's for this project.
Do consider stripboard to make the ESL's.
  Reply With Quote
Old 21st November 2017, 07:15 PM   #6
janosch simon is offline janosch simon  Germany
diyAudio Member
 
Join Date: Jun 2017
thx for the reply guys what panel size would you suggest? im not so fit in the right hv and the voltage on the stators do you have a good link for laying out a system?
what you mean by stripbord? why not pcb with metal coating and cnc milled?

cheers janosch
  Reply With Quote
Old 22nd November 2017, 02:22 AM   #7
Andersonix is offline Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Electrostatic Boombox
Confession: Totally against the DIY spirit, I want to get one of the TreVolo (They're $200 at Benq outlet) and then add a bit of bass myself. Never heard them, but still want. Dog help me...
  Reply With Quote

Reply


Electrostatic BoomboxHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
electrostatic SHIELD meridian123 Solid State 0 11th January 2014 11:03 AM
Electrostatic headphones Jamh Analogue Source 1 12th August 2011 06:09 AM
Using electrostatic CRT's Simpleton Parts 1 22nd June 2005 10:08 PM
electrostatic shield of X'former nyatt Everything Else 0 19th February 2004 04:58 AM
Electrostatic's and Sensitivity fr0st Planars & Exotics 11 3rd February 2004 08:27 PM


New To Site? Need Help?

All times are GMT. The time now is 05:35 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki