Recommend an amp for electrostatic speakers 1.2 Ohms - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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
Thread Tools Search this Thread
Old 24th April 2014, 01:22 AM   #1
beanbag is offline beanbag  United States
diyAudio Member
Join Date: Dec 2004
Location: california
Default Recommend an amp for electrostatic speakers 1.2 Ohms

Hello folks,

Does anybody have an amp (module) recommendation for driving the panel section of a hybrid electrostatic speaker? It has the high-pass circuitry already built in, so that means the amp does not drive the transformer directly. There is a (small) series resistor and DC blocking capacitor in the way. The impedance is higher at lower frequencies and only drops to 1.2 Ohms at 20 kHz. Preferably I would like a unit that can do 100W or more into 4 ohms.
  Reply With Quote
Old 24th April 2014, 10:59 AM   #2
diyAudio Member
Join Date: Apr 2010
Not a cheap solution:
hoellstern 12.4 can go down to 1 Ohm per channel
they use PFC PSU and can therefore deal with wide input range.
  Reply With Quote
Old 24th April 2014, 11:05 AM   #3
Rewind is offline Rewind  Sweden
diyAudio Member
Join Date: Jan 2009
I wonder if it matters much at such high frequencies.
  Reply With Quote
Old 24th April 2014, 01:30 PM   #4
PMental is offline PMental  Sweden
diyAudio Member
Join Date: Feb 2013
Hypex amps handle 1 ohm impedances without trouble. The NCore is the top one, but the cheaper UcD modules can also handle 1 ohm loads.

Hypex Electronics BV - Home

NCore400 data sheet:
UcD400 data sheet:

(See "Recommended operating conditions" for minimum load impedance)

Both of these should have you covered comfortably in the power department and should sound great as well. Some DIY required though, mostly just connecting stuff together (PSUs, cables and such are also available from them).
  Reply With Quote
Old 26th April 2014, 10:36 PM   #5
beanbag is offline beanbag  United States
diyAudio Member
Join Date: Dec 2004
Location: california
Thanks. The Hypex seems to way to go. I could not get any info on whether any of the other class D boards, such as from hifimediy, connexelectronic, or classdaudio would do 1 ohm. Some could do 2 ohm.
  Reply With Quote


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
Speakers: 8 ohms vs. 16 ohms KT Multi-Way 2 14th April 2006 05:06 PM
UCD180 & electrostatic speakers vinodk Class D 3 15th November 2005 01:04 PM
I have a pair of JBL control 5 speakers, which valve amp design you recommend? ultrapato Tubes / Valves 4 21st July 2005 03:25 AM
Electrostatic Speakers & Amp ralph-bway Multi-Way 28 6th July 2003 06:43 PM
Tube amp and electrostatic speakers. Roger Tubes / Valves 31 26th November 2002 04:54 PM

New To Site? Need Help?

All times are GMT. The time now is 07:22 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