Drop In Replacements

[Chrisflex]

Are there drop in* replacements / upgrades* for these opamps found in a Rotel RC-972 preamp?

1. AD712JN
2. OPA2604
3. NJM2114D

 

[ticktock]

http://www.diyaudio.com/forums/chip-amps/82610-best-sounding-dual-opamps.html

http://www.diyaudio.com/forums/parts/173908-replace-ne5532an.html

http://www.diyaudio.com/forums/parts/241747-worth-replacing-ne5532p-signetics-ne5532an-other.html

and lots more

 

[Andersonix]

Rule of thumb: replace jFet input type with same, and BJT with same.

 

[macboy]

Rule of thumb: replace jFet input type with same, and BJT with same.

100% agree! Most circuits optimized for one type will be very sub-optimal for the other.

The AD712 seems a little out of place (spec wise) in audio, but why not I suppose. The other two are already among the better audio grade op-amps available. Dropping in a replacement that is guaranteed to perform better is not possible, IMHO, without knowing the circuit it is going into. Post at least a partial schematic, then discussion can begin.

 

[sreten]

Hi,

Rule of thumb :

You can hardly ever improve things substantially
with op-amp substitution unless the original is built
down to a price and is clearly very compromised.

I doubt the Rotel is the latter.

rgds, sreten.

 

[KatieandDad]

RC-972 schematic

Here's the schematic to give you something to chomp on.

 

[KatieandDad]

With the digital switching at the inputs, I don't imagine you will gain very much with playing with expensive op-amps after it.

 

[Andersonix]

Hi,

Rule of thumb :

You can hardly ever improve things substantially
with op-amp substitution unless the original is built
down to a price and is clearly very compromised.

I doubt the Rotel is the latter.

rgds, sreten.

By your rule of thumb, the following gear of mine was "clearly very compromised": Oppo 980, Marantz SR4200, and B&K AVP1000. Or maybe I just got lucky again and again....