Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 3rd October 2006, 09:11 PM   #1
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Default A little more twisted than usual....

Hey Folks,

I have a few projects that have a lot in common, and they are beginning to run together in terms of concerns. In fact the ideas are modular, and build on each other.

Examples:

Twisted Sibling - A balanced line driver/preamp and SE/BAL converter.
Twisted X Overture(TXO) - A balanced symmetrically bridged power amp.
Twisted X Symphony(TXS) - Same as TXO but with two OPA549 working at much lower gain (the gain is handled more by the THS41xx in this case).

Anyway, I have made a whole lot of progress on this stuff, but it does not belong in any single thread, until now. I have decided to launch his thread to discuss the modular approach to all three projects. More projects are planned and in the works based on the modules contained here.

Using the modules I have designed one could create a power amp project of anywhere from 50W to 300W or more....

Anyway here is an article to get people started. I am very interested in feedback from the community here, and ideas. This document is pretty high level. I don't want to lose people in details just yet. But this is the place to talk about it, and expand on things. Any important info will be added as a new revision of the document.

I will probably write more detailed articles later should people be interested.

A Very Twisted Missive

Cheers!
Russ
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 3rd October 2006, 11:05 PM   #2
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Following
  Reply With Quote
Old 4th October 2006, 12:52 AM   #3
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: London
Me too! Its a great concept and very versatile to boot but I really just want the kits already
  Reply With Quote
Old 4th October 2006, 02:07 AM   #4
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default there is a need

People have been waiting for this kind of thing to be done by someone who knows what they are doing, esp. an amp that can be high power, the 300W you mention.

It all looks good to me and I think that there will be much interest.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 4th October 2006, 08:30 AM   #5
waltona is offline waltona  United Kingdom
diyAudio Member
 
Join Date: Apr 2005
Location: Up North
Yep, I'm liking it too. I've started to save my pennies now. Keep up the good work.

Al
  Reply With Quote
Old 4th October 2006, 04:43 PM   #6
diyAudio Member
 
maxlorenz's Avatar
 
Join Date: Oct 2003
Location: osorno , Chile
Russ and Brian,

Impressive work and concept!

Maxw,

Quote:
...but I really just want the kits already
LOL
Another "obssessive-compulsive builder", like me...
I really have to take the time and open a thread about that subject.

Regards,
M
  Reply With Quote
Old 4th October 2006, 07:05 PM   #7
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
Is it appropriate to ask if DC blocking can be addressed in a coherent fashion?
For instance: "If your XX pre output contains no DC component you may omit the caps."
Is there a "best" place (or way) to manage DC content?

I really like what you're doing Russ.
  Reply With Quote
Old 4th October 2006, 11:05 PM   #8
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally posted by Ed Lafontaine
Is it appropriate to ask if DC blocking can be addressed in a coherent fashion?
For instance: "If your XX pre output contains no DC component you may omit the caps."
Is there a "best" place (or way) to manage DC content?

I really like what you're doing Russ.

Thanks Ed!

My first choice to block DC would be at the source which is what we do on the Opus.

If you used Opus --> TXD --> JT --> TXO you would nothing other than DC blocking caps which are already on the Opus DAC.

For another source, if you thought you needed it you could add an external CAP. In most cases this will not be necessary, when it is that caps people want are widely varied, and are probably best handled off the PCB.


Cheers!
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 5th October 2006, 03:30 AM   #9
diyAudio Member
 
MashBill's Avatar
 
Join Date: Jun 2004
Location: Kansas, USA
I'm very interested!
  Reply With Quote
Old 6th October 2006, 02:42 AM   #10
BillH is offline BillH  United States
diyAudio Member
 
BillH's Avatar
 
Join Date: Mar 2005
Location: Wisconsin
Russ, count me in.

Do the twisted amps handle low impedance loads? I'd like to build an pair of amps of 60 to 100 watts each to drive ESLs. Will the amp's protection circuit handle an overcurrent condition well?

Thanks to you and Brian for your work so far.
  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
need an opinion..... as is usual Madmike2 Multi-Way 12 17th March 2008 12:15 PM
Not your usual hum problem. Please help. madisonears Chip Amps 10 27th February 2008 11:44 PM
A Dummy Load different from the usual fotios Solid State 5 1st March 2007 08:38 AM
Not the usual box..... (PIC) MCH Multi-Way 9 10th February 2006 11:13 PM


New To Site? Need Help?

All times are GMT. The time now is 11:05 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