OPA228 vs NE5534 - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

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 February 2008, 06:05 PM   #1
diyAudio Member
 
Join Date: Feb 2005
Location: Southern France
Default OPA228 vs NE5534

Hi all,

what would you say about swapping NE5534 opamps for OPA228?

It's for a class-A mosfet-based headphone amp that I designed a few years ago (which sounds very good, although it creates a lot of heat, but that's part of the fun, I guess).

I was going to try OPA134 and OPA627, but OPA228 seems like a good alternative...

Any opinion?
  Reply With Quote
Old 18th February 2008, 06:16 PM   #2
diyAudio Member
 
Join Date: Feb 2008
Location: Erfurt, Germany
Send a message via ICQ to syntheticwave
the NE5534 makes a little bit more noise, 3,5 instead 3,0nV/SQR Hz. But I have build by the 5534 a good headphone amp sometimes.
  Reply With Quote
Old 18th February 2008, 06:24 PM   #3
diyAudio Member
 
Pjotr's Avatar
 
Join Date: Nov 2002
Location: Netherlands
Hi,

If you want the ultimate audio op-amp at this moment have a look at the LME49710NA

Cheers
  Reply With Quote
Old 18th February 2008, 08:33 PM   #4
diyAudio Member
 
jerome69's Avatar
 
Join Date: Feb 2008
Location: Lyon
Hello from France

I made a mosfet amplifier with a AOP to drive the power stage and I tried several AOP like NE5534, OP27, LT1028 etc.
The sound of the OP27 was better more clear. The OP228 is a better than a OP27.

Ten year later, I think you should choose the better AOP for your configuration. The environment is very important (schema, resistance value etc.) and it can influence the AOP, for example it could be oscillate.

Have fun.
  Reply With Quote
Old 21st February 2008, 08:57 PM   #5
diyAudio Member
 
Join Date: Feb 2005
Location: Southern France
Ok... my headphone amp got a new pair of power resistors (68 ohms/25 W) and a pair of OPA228's... (by the way, the MOSFETs are IRF520's)

Also, this amp has no capacitor in the audio signal path whatsoever and is powered with +/- 15V regulators, separated for left and right (so that's 4 regulators...)

This beast is amazing!

As compared to the NE5534, OPA228 makes the amp more detailed with better dynamics. High frequencies are maybe a bit harsh though. Or maybe it's just too clean sounding....
Attached Images
File Type: jpg dsc00449.jpg (86.2 KB, 465 views)
  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
NE5532 vs NE5534 rumblinbass Parts 9 14th December 2007 02:24 PM
replacing NE5534 AN pjpoes Parts 3 23rd January 2007 05:13 PM
NE5534 compensation ? AndrewT Solid State 22 12th February 2006 10:42 PM
Wtb Philip Ne5534 goto2003 Chip Amps 0 28th December 2005 03:37 PM


New To Site? Need Help?

All times are GMT. The time now is 07:16 PM.


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