Hello. I was given this amplifier and i want to replace the opamps.
Phono stage had a JRC4559DS (service manual has NJM4559DS)
Tone control had a JRC4558D (service manual has NJM4559DS)
Super bass had a JRC4558D (service manual has AN6552)
Can i replace all of them with NE5532P ?I have access to this opamp at the moment.Has anyone tested these opamps with this amplifier?how is the sound experience compared to the originals?
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Phono stage had a JRC4559DS (service manual has NJM4559DS)
Tone control had a JRC4558D (service manual has NJM4559DS)
Super bass had a JRC4558D (service manual has AN6552)
Can i replace all of them with NE5532P ?I have access to this opamp at the moment.Has anyone tested these opamps with this amplifier?how is the sound experience compared to the originals?
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What decoupling is there for the opamps? NE5532 requires fast ceramic decoupling between V+ and V- to achieve full performance.
Note the NE5532 is a lot faster than the existing devices - I suspect decoupling provision will be inadequate (either not present or too far from the chip).
Note the NE5532 is a lot faster than the existing devices - I suspect decoupling provision will be inadequate (either not present or too far from the chip).
I don't see why not. Its just another 741 op amp variant.
Other op amps to try would be the TLE2072
there are no ceramic decoupling caps at all close to the opamps, nor provision. only 2x 100uf at the psu side which is far away.
NJM2068 is a improved drop-in. it has pnp inputs similar to 4558/9, so any bias related offset is in the similar range.
available at Radio-Spares, now named RS components
available at Radio-Spares, now named RS components