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

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

JRC 4556AD opamp Replacement?
JRC 4556AD opamp Replacement?
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 26th February 2009, 05:14 PM   #1
Pyre is offline Pyre  Canada
diyAudio Member
Pyre's Avatar
Join Date: May 2006
Send a message via MSN to Pyre
Default JRC 4556AD opamp Replacement?


I have a Dynaco CDV-2 that has a JRC 4556AD as the opamp. I was looking to upgrade it as its quite an old piece. Is there a better drop in replacement available now?

  Reply With Quote
Old 26th February 2009, 10:41 PM   #2
UV101 is offline UV101  England
diyAudio Member
UV101's Avatar
Join Date: Dec 2008
Location: Oxford
Looks like a std dual op amp! Is it DIP?

There are any number of drop in replacements.

You can try LM4562NA for about £10 a pair. I've got a couple of set of these and they are very good. Even better with decent decoupling caps on the supply rails (Try Rubycon ZA's)
If you were feeling very extravagant, you could try LME49720H. These are excellent. They are in a slightly different form but not difficult to fit see this thread


They are about £28 a pair on ebay!

When Bitstream came out, I thought, “my God, what are we going to do...?” Ken Ishiwata http://www.hifisounds.co.uk
GValve Pre, GFA-5500 Class A power, Audio Aero Capitole MKII, Focal and Kimber "Leave Nothing as Standard"
  Reply With Quote
Old 26th February 2009, 11:19 PM   #3
Pyre is offline Pyre  Canada
diyAudio Member
Pyre's Avatar
Join Date: May 2006
Send a message via MSN to Pyre

It is just a standard dip dual op amp I was just going to put in a socket so I could try a couple of different ones.

I happen to have a LM4562 here that I can try as I bought two of them when I swapped the old one out of a CDV-1 a while back.

I do not see any LME49720H's on Ebay right now but I will keep looking. 28$ is not bad if it makes a difference. They do look interesting.

Thanks for the help
  Reply With Quote
Old 27th February 2009, 10:16 AM   #4
pilli is offline pilli  France
diyAudio Member
Join Date: Aug 2006
Originally posted by Pyre
It is just a standard dip dual op amp ...
I think that one small thing that is specific to the 4556 is the drive capability, which is why you find it sometimes in CD players for the headphone output.

From the datasheet:
"The NJM4556A integrated circuit is a high-gain, high output
current dual operational amplifier capable of driving ±70mA into
150Ω loads (...)
The NJM4556A combines many of the features of the
popular NJM4558 as well as having the capability of driving
150Ω loads."

This feature (if your circuit needs it at all) shouldn't be diffcult to find in other better OpAmps - sorry, I don't have a suggestion in mind.


  Reply With Quote


JRC 4556AD opamp Replacement?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
best opamp replacement for TL07x? SemperFi Instruments and Amps 8 21st December 2009 07:59 PM
DC300A opamp replacement ks-JPN Solid State 0 30th October 2008 07:17 AM
OPAmp replacement jpy1974 Chip Amps 5 12th March 2007 02:14 PM
Opamp Replacement Help tone Digital Source 1 19th August 2002 05:41 PM
5532 opamp replacement 2Bak Parts 7 5th May 2002 04:43 AM

New To Site? Need Help?

All times are GMT. The time now is 10:58 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio