opamp substitution ----> Which one? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, 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 8th January 2003, 12:33 PM   #1
diyAudio Member
 
Join Date: Sep 2002
Location: north of Italy
Default opamp substitution ----> Which one?

In my Denon cdp there is an opamp, a nec 4570c, can I replace it with one best?
with this change I can improve the quality of the sound?
If the answer is yes, which do you recommend me?

i have alredy damped the case with a big improvement of the bass and a greater clarity of the middle and high

Best regards,
m60gpmg
  Reply With Quote
Old 8th January 2003, 01:49 PM   #2
diyAudio Member
 
Sparhawk's Avatar
 
Join Date: Sep 2002
Location: Ontario, Canada
I replaced two 4570's in my Yamaha with four BB OPA627's. This is not easy to do, replacing a dual opamp with two singles. But the OPA627 seems to be the best, so I thought it was worth the trouble. I also added a Kwak Clock, and separate power supplies for the clock and the opamps. I have some pictures around somewhere... I'll post them if I can find them.
  Reply With Quote
Old 8th January 2003, 03:29 PM   #3
diyAudio Member
 
Join Date: Sep 2002
Location: north of Italy
Quote:
This is not easy to do, replacing a dual opamp with two singles
In fact I would prefer a simpler solution
Quote:
But the OPA627 seems to be the best
Another good opamp that is not single on the contrary double does exist? (since I would prefer a simple assemblage)

Best regards,
m60gpmg
  Reply With Quote
Old 8th January 2003, 03:41 PM   #4
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
If 4570 is a dual opamp maybe OPA2134 may fit? Anybody who has data over 4570?
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote
Old 8th January 2003, 03:43 PM   #5
Wombat is offline Wombat  Germany
diyAudio Member
 
Wombat's Avatar
 
Join Date: Jul 2002
Location: Germany
NEC 4570

Dual OP amp

4,5 nV
7V/µs
15MHz
__________________
If time permits - stuff some parsley in your ears and listen how it grows!
  Reply With Quote
Old 8th January 2003, 04:26 PM   #6
diyAudio Member
 
Sparhawk's Avatar
 
Join Date: Sep 2002
Location: Ontario, Canada
Quote:
Originally posted by m60gpmg

In fact I would prefer a simpler solution

Another good opamp that is not single on the contrary double does exist? (since I would prefer a simple assemblage)

Best regards,
m60gpmg
Maybe an OPA2604? Probably the next best thing to a pair of 627's.
  Reply With Quote
Old 8th January 2003, 05:15 PM   #7
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally posted by Sparhawk
Maybe an OPA2604? Probably the next best thing to a pair of 627's.
OPA2134 has slightly better data than OPA2604 but how much does it mean?
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote
Old 8th January 2003, 05:18 PM   #8
diyAudio Member
 
Sparhawk's Avatar
 
Join Date: Sep 2002
Location: Ontario, Canada
Quote:
Originally posted by peranders

OPA2134 has slightly better data than OPA2604 but how much does it mean?
I haven't compared them myself, but others seem to think that the 2604 sounds better than the 2134.
  Reply With Quote
Old 8th January 2003, 09:10 PM   #9
Nicke is offline Nicke  Sweden
diyAudio Member
 
Nicke's Avatar
 
Join Date: Jun 2001
Location: Sweden
Default Re: opamp substitution ----> Which one?

Quote:
Originally posted by m60gpmg
In my Denon cdp there is an opamp, a nec 4570c, can I replace it with one best?
with this change I can improve the quality of the sound?
If the answer is yes, which do you recommend me?

If it is a multibit DAC(I think Denon often have multibit DAC´s) I can recommend Jocko´s circuit.
Found here:Jocko´s I-V stage

I use a slightly modified version followed by a simple JFET follower.
Try it,you will not be disappointed

Nicke
  Reply With Quote
Old 8th January 2003, 09:48 PM   #10
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default more op-amp subst...

I have a Nakamichi CD-4, with a 9(!)pin, single in-line NJM 5532 S,
-please help me with a data-sheet / pin-config for this!

Arne K
  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
GZ37 Substitution? Hackensack Tubes / Valves 7 25th April 2014 09:37 PM
Capacitor Substitution d5post Parts 7 3rd May 2009 12:59 PM
6N1/6N3 substitution woodturner-fran Tubes / Valves 7 31st January 2007 01:15 PM
Single supply opamp - unequal rail voltage and opamp selection Hans L Parts 8 19th February 2006 02:15 PM
11k resistor substitution...? mcelaj Solid State 3 6th January 2004 04:31 PM


New To Site? Need Help?

All times are GMT. The time now is 10:38 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