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Technics CD players opamp upgrade

Sam Mcdonald
Intellectual 330 points
Other Parts Discussed in Thread: OPA1602, OPA1612

Hi,

I am not sure which opamp to change or would be suitable for the 2 Technics CD players.

Technics  SL-P477A
Current
LM833M - comparator

BA4560FT - buffer amp

==============

Technics SL -PG440A


LM833M - differential

BA4560FT - L.P Filter

PDFs of the old op amps
www.micropik.com/.../ba4560.pdf

Thank you

Sam

  • 0
    TI__Guru* 93105 points

    Hi Sam,

    I expect the most benefit will come from applying the high performance op amp after the converter in the signal chain. Then, focus on what follows it. Take a look at the OPA1602. It is a bipolar input audio op amp with very low noise and distortion. It is available in the MSOP package which I think may be used in the circuits. If not, it is available in the standard SO-8 as well.

     Regards, Thomas

    PA - Linear Applications Engineering

  • 0 in reply to Thomas Kuehl
    Intellectual 330 points
    Hi Thomas
    Thank you for the help again with the opamp and placement. I thought it was the LM833M, but it must be the 4560ft. I know the opa1612 did wonders on the V8 phonostage.

    Regards
    Sam