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

Headphone Systems Everything to do with Headphones

Balanced Drive 2 Transistor SE Class A Headphone Amp
Balanced Drive 2 Transistor SE Class A Headphone Amp
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 16th June 2019, 03:02 AM   #11
Dibya is offline Dibya
diyAudio Member
 
Join Date: Apr 2018
Location: Inside your preamplifier
xrk971 , the legendary class A man is back.


By the way , I am a electric guitar player , too be honest certain types of noise actually fills good . I have a modern class AB amp , which I don't hate but old germanium based Class A amp which I got from my granny sounds really amazing as if I am listening to some short of tube amp .
We shall remember that sound is subjective so only objective measuring can't explain whether a AMP sound's good or not . Probably you guys know guitar player generally prefers germanium fuzz pedal over silicon one .

Last edited by Dibya; 16th June 2019 at 03:12 AM.
  Reply With Quote
Old 16th June 2019, 03:32 AM   #12
Mark Johnson is offline Mark Johnson  United States
diyAudio Member
 
Mark Johnson's Avatar
 
Join Date: May 2011
Location: Silicon Valley
Balanced Drive 2 Transistor SE Class A Headphone Amp
Hmm, ok, so the math is wrong (Zout of each balanced output is 10R) but nevertheless the sound is right (?). Then why even mention the math? It only distracts from the main message which, apparently, is: forget numbers, they do not match human perception.

What has happened here is, somebody focused upon SPICE simulated harmonic distortion without checking whether the balanced outputs were or were not balanced. Upon discovery that in fact they are not balanced, not even close, the goalposts begin to move. Ok.
  Reply With Quote
Old 16th June 2019, 05:37 AM   #13
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Balanced Drive 2 Transistor SE Class A Headphone Amp
When viewed with an OScope the signal splits very evenly with square waves:
Click the image to open in full size.

And with music:
Click the image to open in full size.
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio

Last edited by xrk971; 16th June 2019 at 05:40 AM.
  Reply With Quote
Old 16th June 2019, 09:04 AM   #14
00940 is online now 00940  Belgium
diyAudio Member
 
00940's Avatar
 
Join Date: Sep 2003
Location: Liège
I would worry less about thd or absolute balance (which doesn't matter much for headphones) than about the effect on frequency response of a highish output impedance into headphones. Some have a very uneven impedance curve.

Once you get through the trouble of having a pcb made, adding a few transistors into the mix is a very marginal effort/cost. So those EF mentioned sounds like a good idea to me.
__________________
All that is excessive is insignificant. Talleyrand
  Reply With Quote
Old 15th July 2019, 03:58 AM   #15
dogears is offline dogears  Philippines
diyAudio Member
 
Join Date: Feb 2004
Location: Philippines
aksa on a headphone amp - must be good!
  Reply With Quote

Reply


Balanced Drive 2 Transistor SE Class A Headphone AmpHide 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
Clone Audio Technica Class A AT-HA5000 FET Transistor Headphone Amplifier NTSBuilding Headphone Systems 19 14th September 2018 04:04 AM
LM4702 or LME49810 work in class A mode to drive the output stages in class A/AB rhythmsandy Chip Amps 29 29th December 2012 11:54 AM
"Balanced" vs single ended headphone drive chris719 Headphone Systems 11 14th September 2012 06:45 PM
Balanced Drive sounds better? How?! b1o2r3i4s5 Headphone Systems 11 3rd March 2012 02:10 PM
How to drive balanced? vossie Solid State 2 20th January 2004 12:08 PM


New To Site? Need Help?

All times are GMT. The time now is 11:19 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki