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

Chip Amps Amplifiers based on integrated circuits

Replace OPA2604 with OPA1612?
Replace OPA2604 with OPA1612?
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
Thread Tools Search this Thread
Old 6th January 2010, 01:55 AM   #1
Trafford10 is offline Trafford10
diyAudio Member
Join Date: Jan 2010
Default Replace OPA2604 with OPA1612?

I have an Onix XCD-99 which is basically a Music Hall CD-25. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. I was wondering if the OPA2604's could be replace with a dual opamp like the OPA1612 with similar or hopefully better results than the OPA627's?

I am a newbie at this and I didn't want to spend so much on the 627's since they seem to be an older design that is more expensive because of the older production techniques when the cheaper 1612 can do as good or better in this application.

Can anyone provide me with some advice? Is this a relatively simple swap out? I appreciate any help.

I'm trying to squeeze a little more life out of this older CD player in the most cost effective way I can.

  Reply With Quote
Old 10th June 2010, 07:32 AM   #2
apolo is offline apolo  Serbia
diyAudio Member
Join Date: Nov 2009
OPA2604 is FET input opamp. OPA1612 is bipolar input opamp. It can be replaced but you'll get diferent sound character. try modding with better FET input opamp, like OPA2107 or OPA2111
  Reply With Quote
Old 10th June 2010, 08:20 AM   #3
rrrremus is offline rrrremus  Germany
diyAudio Member
Join Date: Sep 2009
Location: Timisoara
OPA1611/1612 is a very good op-amp. You should give them a try, especially if you replace the output buffer. For the diff amps you should use high speed and wide bandwidth like OPA827 ( free samples available ).
It is a simple swap-out, there is nothing that can go wrong.
  Reply With Quote
Old 11th June 2010, 03:36 AM   #4
jcx is offline jcx  United States
diyAudio Member
Join Date: Feb 2003
Location: ..
opa627 is very good - not a chip I'd think to "upgrade"
  Reply With Quote
Old 11th June 2010, 04:06 AM   #5
EUVL is offline EUVL  Europe
diyAudio Member
Join Date: Oct 2003
Try the latest and the greatest -- OPA2141

Precision Amplifier - Low Input Bias Current/FET Input - OPA2141 - TI.com

  Reply With Quote
Old 14th June 2010, 04:42 AM   #6
lordearl is offline lordearl  Australia
diyAudio Member
Join Date: Jun 2007
Anyone selling this yet? Datasheet looks great!
  Reply With Quote
Old 15th June 2010, 03:47 PM   #7
hags is offline hags  United States
diyAudio Member
Join Date: Nov 2004
Location: Chain o' Lakes
The OPA2604 is a very nice sounding and performing op amp. I had replaced all four in my Ultech UCD100 but quickly changed them back.

Waste of time in the Ultech in my opinion.
"Some lures are designed to catch fish, others are designed to catch fisherman."
  Reply With Quote


Replace OPA2604 with OPA1612?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Replace NE5532N with Burr Brown OPA2604 rocky2889 Parts 8 3rd October 2006 06:55 PM
New - need advice on OPA2604 raf Chip Amps 7 2nd July 2004 09:01 AM
Tda1543=>opa2604 sparkle Digital Source 7 12th April 2004 05:55 PM
opa2604: where to buy? Michele Spinolo Parts 7 12th April 2004 05:35 PM
OPA2134 or OPA2604 JoeBob Solid State 5 7th January 2002 11:20 AM

New To Site? Need Help?

All times are GMT. The time now is 06:47 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio