What is the highest ohm speaker? - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 20th October 2010, 10:54 PM   #1
nige838 is offline nige838  United States
diyAudio Member
 
Join Date: Dec 2009
Default What is the highest ohm speaker?

I've been building several tube amplifiers lately and had the idea to eliminate the output transformer (or at least make it's values smaller). It seem like there is a lot of energy and expense that is lost in this last step...

Anyways, I'm curious if anybody's head of a speaker that is higher than 16ohm? Anybody have any information on a output transformer-less tube POWER amplifier? Seems like it would be entirely possible to make a speaker that's REALLY high ohm, just doesn't seem like it's being produced...

Thanks for the replies (if any),
Nick
  Reply With Quote
Old 21st October 2010, 12:00 AM   #2
diyAudio Member
 
Join Date: Sep 2002
Location: New York city
Well, the obvious solution is to run a multi-driver setup with the drivers wired in series.

But there are reasons why speakers tend to be low-impedance. Beyond 16 ohms, it's hard to get enough power consumption as current is limited. To get equivalent power dissipation, output voltage has to rise to satisfy Ohm's law (P=I^2 * R).

There are tube power amps without output transformers. They typically run lots of output tubes in parallel to get the required current. Do a google search for OTL.
__________________
Peter Hansen
www.audio.thesonicboomers.com
  Reply With Quote
Old 21st October 2010, 01:22 AM   #3
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
I'm not into Amps/Transformers, for now, but this seemed very interesting to me, for being on the same subject...
"The ETF2009 shootout was a contest of single-ended output transformers."
European Triode Festival - ETF2009 Shootout
Search and Google...
http://www.electronics-related.com/u...ow/95954-1.php
__________________
NEXT-proaudio Portugal

Last edited by Inductor; 21st October 2010 at 01:33 AM.
  Reply With Quote
Old 21st October 2010, 01:40 AM   #4
Banned
 
Join Date: Jan 2008
Blog Entries: 2
If you google 'high impedance speaker'...

w
  Reply With Quote
Old 21st October 2010, 02:13 AM   #5
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
Another one.
Ceramic speaker driver amplifier design
__________________
NEXT-proaudio Portugal
  Reply With Quote
Old 21st October 2010, 07:38 AM   #6
el`Ol is offline el`Ol  Germany
diyAudio Member
 
Join Date: May 2005
Location: Bavarian Forest
Philips had transformerless systems with 800 Ohm drivers. But they were not very common. Does anybody know why this wasn't done more often?
  Reply With Quote
Old 21st October 2010, 07:58 AM   #7
diyAudio Member
 
aardvarkash10's Avatar
 
Join Date: Mar 2007
Location: Auckland, NZ
the output voltage was comparatively high (danger!) and the speaker difficult to build (very thin coil windings). There are also very good reasons to build any electromagnetic winding that has to respond to very fast changes in applied voltage at as low a resistance (fewer turns of windings) as possible. More windings = more self inductive effects that slow the response of the speaker in this case
__________________
"Folks, you can't prove truthiness with information. You prove truthiness with more truthiness. In a process known as truthinessiness." - Stephen Colbert, The Colbert Report
  Reply With Quote
Old 21st October 2010, 08:02 AM   #8
diyAudio Member
 
Join Date: Jun 2010
Location: St. Petersburg
ELECTROSTATIC

At DC R is infinity almost.
  Reply With Quote
Old 21st October 2010, 10:15 AM   #9
gooki is offline gooki  New Zealand
diyAudio Member
 
Join Date: Dec 2008
Arvus loudspeakers have some high ohm drivers. 32ohm units are common as is their 16ohm quad voice coil 8 inch woofer that allows 64ohm wiring. Note their not full range drivers though.
  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
How to change ohm value of speaker? henkel Multi-Way 24 30th June 2013 12:44 AM
Driving 8 Ohm Speaker bikerbiker Solid State 8 12th November 2008 10:08 PM
Can you use a 8 ohm crossover with 4 ohm speaker? Bull Subwoofers 1 19th May 2005 09:37 PM
6 ohm speaker 8 ohm amp EDAT Multi-Way 7 15th January 2004 09:19 PM
speaker ohm question ViPER Multi-Way 7 4th January 2004 10:14 AM


New To Site? Need Help?

All times are GMT. The time now is 10:29 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