Is NJM4580D an upgraded NJM4560D ?

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lalomarantz

Member
Joined 2010
#1
I greet with great pleasure

I have a 1980 sony amplifier that uses NJM4560D as flat amplifier in tone section, i would like to upgrading performance like S/N, slew rate, THD. I think to use NJM4580D to replace NJM4560D

I have a question: can i use NJM4580D as direct upgrading of NJM4560D?

I only seek a direct replacement without modifying the circuit, I just want to desolder the NJM4560D chip and put in place the upgraded Op-amp.

I would greatly appreciate your comments regarding my question

Thank you.
 
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#5
If you look at datasheets for both 4560 and 4580 you shall see that schematics are identical! Both are upgraded versions of 4558, but 4580 is better of the two. These are industrial quality opamps. If you can find NJM2114, which is ultra low noise, it would be even better.
 
#6
Hi,

I should keep the NJM4580d for a I/V conversion stage in an old CD player... it can be incredible here !

I follow Molly with the NE 5532. But IMO sometimes problematic with the trebles or high-medium (lack of definition?) but I'm not sure it will be a problem in a tone section of your amplifier.
 
#7
Eldam said:
Hi,

I should keep the NJM4580d for a I/V conversion stage in an old CD player... it can be incredible here !

I follow Molly with the NE 5532. But IMO sometimes problematic with the trebles or high-medium (lack of definition?) but I'm not sure it will be a problem in a tone section of your amplifier.
Click to expand...

The 5532 can give less than ideal results I find, when used as an I/V convertor but I suspect this is down to the bjt front end reacting (demodulating) the HF hash present from the DACoutputs. No such issues when used as a "gain block" such as a tone control.

Who's Molly ? 😀
 
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