commercial high-power transconductance amplifier! - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 1st August 2005, 03:40 PM   #1
taloyd is offline taloyd  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Los Angeles, CA, USA
Exclamation commercial high-power transconductance amplifier!

Hello,

I was browsing through the Marchand Electronics page, and I stumbled on this... definitely looks like a high-power transconductance amplifier, and Marchand is an excellent company in regards to electronics.

$950

http://www.marchandelec.com/cl54.html

Would be fun to use with subwoofers as would bypass the issue of thermal compression and other non-linearities...

cheers,

-tal
  Reply With Quote
Old 4th August 2005, 04:13 AM   #2
tade is offline tade  United States
diyAudio Member
 
Join Date: Feb 2005
Location: Ralieigh nc
Send a message via AIM to tade
what is transconductance?
  Reply With Quote
Old 4th August 2005, 04:31 AM   #3
rnrss is offline rnrss  United States
diyAudio Member
 
Join Date: Jul 2005
Location: na
Send a message via AIM to rnrss Send a message via MSN to rnrss Send a message via Yahoo to rnrss
Default Re: commercial high-power transconductance amplifier!

Quote:
Originally posted by taloyd
Hello,


Would be fun to use with subwoofers as would bypass the issue of thermal compression and other non-linearities...

cheers,

-tal
Actually CCS amp add other nonlinearities, overshoot duu to no damping... see my post

Speaker wire ......... Why

Quote:
Originally posted by tade
what is transconductance?
constant current source rather than constant voltage
  Reply With Quote
Old 4th August 2005, 04:58 AM   #4
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean

Constant current source . . . ? ? ?

My understanding is . . .
Transconductance amplifier (current amplifier) means that output current is proportional to input voltage while voltage amplifier means that output voltage is proportional to input voltage . . .


Regards
jH
  Reply With Quote
Old 4th August 2005, 02:26 PM   #5
tade is offline tade  United States
diyAudio Member
 
Join Date: Feb 2005
Location: Ralieigh nc
Send a message via AIM to tade
of what benefit is variable current to me, the humble listener?

thanks
  Reply With Quote
Old 4th August 2005, 04:25 PM   #6
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean

Hmm . . .
I do not know why I can't connect . . .
Probably u could do . . .
www.firstwatt.com
Full info there . . .


Regards
jH
  Reply With Quote
Old 4th August 2005, 09:25 PM   #7
rnrss is offline rnrss  United States
diyAudio Member
 
Join Date: Jul 2005
Location: na
Send a message via AIM to rnrss Send a message via MSN to rnrss Send a message via Yahoo to rnrss
Quote:
Originally posted by jh6you

Constant current source . . . ? ? ?

My understanding is . . .
Transconductance amplifier (current amplifier) means that output current is proportional to input voltage while voltage amplifier means that output voltage is proportional to input voltage . . .


Regards
jH

Your understanding is correct... and it is called a ccs for that reason... The important thing I would point out to you however is that these amps have little or no damping and damping is what stops or reverses a speaker according to the signal put into it to prevent overshooting...

I did a couple of rather crude writeups on this if you woud like to see them, just beware of the elitest hype...
  Reply With Quote
Old 5th August 2005, 12:14 AM   #8
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean

If you say "current source", then you are right . . .
If you say "constant current source", I'm confused . . .
Probably, you are confused . . .
Output impedamce is, yes, high . . .


Regards
jH
  Reply With Quote
Old 5th August 2005, 04:23 AM   #9
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Re: commercial high-power transconductance amplifier!

Quote:
Originally posted by rnrss
Actually CCS amp add other nonlinearities, overshoot duu to no damping...
This is only true if the speaker unit has inadequate internal damping -- which describes most speakers available. Fortunately there are some very good drivers with adequate mechanical damping that work best with CCS amps.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 5th August 2005, 04:38 AM   #10
Variac is offline Variac  United States
diyAudio Editor
 
Variac's Avatar
 
Join Date: Dec 2001
Location: San Francisco, USA
I would request that we don't turn this into another discussion of Damping Factor. I think everyone has had his or her say on the subject...

  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
URL Collection of Commercial Single Ended Integrated and Power Amplifier Devices tiefbassuebertr Solid State 11 10th July 2012 10:56 AM
transconductance power amplifier for current-drive loudspeaker? alex0 Solid State 30 26th May 2008 09:15 AM
A Transconductance Amplifier Duo Solid State 27 19th February 2007 08:59 PM
A high Current wide bandwidth Transconductance Cell Workhorse Solid State 0 11th June 2006 11:42 AM
A SOZ Transconductance Amplifier gl Pass Labs 21 16th December 2005 08:42 PM


New To Site? Need Help?

All times are GMT. The time now is 06:09 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