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Original question:

TAS2557: Measure RE of speakers

TAS2557: Speaker RE

Zoe Ko
Expert 3860 points
Part Number: TAS2557


Hi team,

The parameter of TAS2557 is built for 7.5ohm speaker. The impedance of speaker is 7.5ohm +/-15%(6.375 ~ 8.625ohm)
If we change the other speaker and the impedance of speaker is 6ohm.
Is there any risk for protection algorithm of speaker ?

Thank you!

  • 0
    TI__Guru** 111485 points

    Hi Zoe,

    It is most recommended to run speaker characterization on your new speaker to keep the best speaker protection algorithm performance.

    Changing speaker impedance without updating the characterization would not allow the algorithm to properly follow the speaker specs and thus performance would be reduced.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • 0 in reply to Ivan Salazar
    Prodigy 210 points

    Dear Ivan :

    There are two speaker from different vendor.
    The impedance of speaker is the same.
    But the T/S parameter and frequency response is different.
    Can we use one parameter of TAS2557 for two speaker ?

    Thanks

  • 0 in reply to Rence
    TI__Guru** 111485 points

    Hi Rence,

    Speaker characterization takes into account several specs of the speaker, not only the impedance.
    As mentioned, it is most recommended to run speaker characterization for each different speaker.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuator