Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

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 April 2012, 12:03 PM   #191
diyAudio Member
 
Join Date: Sep 2002
Location: Rosmalen, The Netherlands
So, why were the files removed?
__________________
Oemptempa petoempetapap
  Reply With Quote
Old 3rd April 2012, 03:59 PM   #192
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Which files?
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote
Old 3rd April 2012, 08:58 PM   #193
diyAudio Member
 
Join Date: Feb 2012
My DIY AMP - National Amplifier Schematic (LME49720+LME49600)
photo:
Click the image to open in full size.

Distorsion test on my EMU1212 gives very low THD & IMD.
AMP used as portable.
With my Beyerdynamic DT990 PRO's sounds very cool!

Sorry for bad English...

Last edited by stridervvv; 3rd April 2012 at 09:05 PM.
  Reply With Quote
Old 3rd April 2012, 10:37 PM   #194
diyAudio Member
 
Join Date: Nov 2011
Location: http://binged.it/ukmr5Y
Quote:
Originally Posted by Jarno View Post
So, why were the files removed?
If you're referring to the National website files, it's because TI has bought them and has recently moved the documents over to their website.

If you're referring to other files, then I have no idea.
  Reply With Quote
Old 4th April 2012, 10:46 AM   #195
diyAudio Member
 
Join Date: Sep 2002
Location: Rosmalen, The Netherlands
The ones ZDR posted.
__________________
Oemptempa petoempetapap
  Reply With Quote
Old 22nd April 2012, 01:34 PM   #196
zdr is offline zdr  Belgium
diyAudio Member
 
zdr's Avatar
 
Join Date: Nov 2005
Location: Brussels
There was an error in the schematics, so I asked to remove the files. Here are the corrected ones, but still did not have time to test them - I already etched and completed the boards with the erroneous ones.
Attached Files
File Type: zip reference1.zip (116.5 KB, 158 views)
  Reply With Quote
Old 26th April 2012, 08:13 AM   #197
diyAudio Member
 
Join Date: Feb 2012
Location: Chandler, AZ
Send a message via AIM to Yangoran Send a message via MSN to Yangoran Send a message via Skype™ to Yangoran
@zdr
How do you think that this will measure compared to "The Wire"?
  Reply With Quote
Old 6th May 2012, 10:31 AM   #198
zdr is offline zdr  Belgium
diyAudio Member
 
zdr's Avatar
 
Join Date: Nov 2005
Location: Brussels
I have no idea - I just designed the pcb based on reference TI design. Output offset is at 1.5mV on both channels.

Mine is assembled now and it works
Attached Images
File Type: jpg referenceOne.jpg (502.4 KB, 300 views)
  Reply With Quote
Old 6th May 2012, 12:22 PM   #199
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
So, do you find that 6dB is too much gain? Given that most headphones are plenty loud @ 1Vrms input, and that a typical CD play puts out up to 2V, then I would think that a buffer is all that is needed for a decent headphone amp.
  Reply With Quote
Old 6th May 2012, 12:23 PM   #200
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Also, the LME49600 is just a diamond buffer with a couple of bells and whistles. It would be more fun to me to try to outperform their chip by designing our own discrete version.
  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
National LME49810TB/LME49830TB UltraHighFidelity HighPower Amplifier Reference Design KLe Chip Amps 75 21st October 2013 12:47 PM
Help with Dayton Reference 2-way Project coldcut Multi-Way 10 23rd May 2010 01:07 PM
How about a 3 inch reference project? type Full Range 52 13th October 2007 04:17 AM


New To Site? Need Help?

All times are GMT. The time now is 07:20 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