TDA2822 headphone amp - question about voltage - diyAudio
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 18th March 2011, 07:55 PM   #1
maurycy is offline maurycy  United States
diyAudio Member
 
Join Date: Dec 2005
Location: NJ
Default TDA2822 headphone amp - question about voltage

I have small amp built based on TDA2822 (schematic). Would it be better to run it on 2xAA or 1x9V? My headphones are AKG with 600 Ohms impedance. I am not really concerned on what would give me longer run time but more concerned what would be the correct voltage to run if used as headphone amp as it takes less time to charge AA than 9V.

Thanks.
  Reply With Quote
Old 18th March 2011, 09:00 PM   #2
diyAudio Member
 
Join Date: Feb 2011
I would go for 9V battery.
2xAA reachrgeable will get you 2*1.2 volts, that is somewhere 2.4 volts.
and You need 3 volts minimum to get it going.

Even so, if the amp could manage to get that 3 volts as output, with a 600 ohm headphone it may not even be enough for anything.
0,015 watt, I em not a headphone user, but that seems a bit low for anything i might think of.

So i would go for the 9V solution.
  Reply With Quote
Old 18th March 2011, 10:33 PM   #3
diyAudio Member
 
Join Date: Feb 2010
Location: Bucharest
Send a message via Yahoo to Th3 uN1Qu3
If the 'phones were 32 ohms i would have used 3 AAAs. In any case not 2. For 600 ohms, 9v all the way. Be aware that the 2822 isn't stellar - it works and it's almost impossible to damage, but that's about it.
__________________
"Audio grade" components simply means that they failed at a more critical job.
  Reply With Quote
Old 19th March 2011, 02:27 AM   #4
maurycy is offline maurycy  United States
diyAudio Member
 
Join Date: Dec 2005
Location: NJ
Thanks for replies. I will go with 9V battery then. In my case it is even better because I already have an enclosure with support for 9V battery. As to the performance of the 2822, I am not too concerned about it because it will be used to amplify signal of my electric guitar for some late night practice. No need for the hi-fi sound.
  Reply With Quote
Old 27th December 2014, 09:45 AM   #5
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
I wouldn't be so sure about that comment on this chips performance.

initial signs in my prototype (with a very crap quality psu capacitor and running at 5v from a 7805 instead of 9v) tda2822m in stereo mode are promising, it stands up to critisism against a KT88 SE in Ultralinear mode while driving a pair of Frugelhorns that use Fostex FE126En's. It doesn't better it of course but comes to within the ballpark of its performance. And I do mean ballpark, not hoolahoop or cereal bowl, ball park, lots and lots of distance. But at least its there! Cant say the same for the LM386 or others like it.

It does have a tad bit of harshness to it but I wouldn't call it unlistenable, not at all! Infact that attribute is probably due to the rubbish nasty chinese electrolytic capacitors in the prototype. And quite a few people online find it sounds good. Very common DIY chip.

I'm rebuilding a new one in monoblock fashion soon and hopefully that will tell me once and for all what this amp sounds like when the surrounding components are at their best.

Just wanted to say this so people in the future reading this thread don't discredit this little amp so easily.
__________________
diyaudio is against your rights. I do not have the right to be forgotten and after asking the issue has been ignored, therefore I'm leaving (peacefully) for this reason. I stand up for my rights. So long and thanks for all the Fish

Last edited by freax; 27th December 2014 at 10:02 AM.
  Reply With Quote
Old 27th December 2014, 03:17 PM   #6
diyAudio Member
 
Join Date: Feb 2011
had few of them, they sound okay
fullrange speakers actualy did work surprisingly well with this chip.
  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
low voltage headphone amp Dan2 Headphone Systems 37 5th January 2015 06:23 AM
TDA2822 headphone amp - should I add volume pot? maurycy Chip Amps 2 17th February 2011 03:06 AM
Headphone amp circuit question. Artie Headphone Systems 5 15th April 2009 07:32 PM
Opinions on my low-voltage hybrid headphone amp (this time with the right file) JHawk24821 Headphone Systems 2 1st August 2004 04:49 PM


New To Site? Need Help?

All times are GMT. The time now is 01:45 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2