Loewe opta R125 distorted sound at high volume

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  • jorpec
    Member
    • Feb 2015
    • 32
    • Portugal
    #1

    Loewe opta R125 distorted sound at high volume

    Hi
    I'm restoring this vintage radio, that had a very weak sound output, after replacing the electrolytic capacitors the sound volume improved but when the volume reach the middle of the knob starts to distort, its like the speaker overdrive and saturates, but only at lower frequencies even with the tone knob at minimum on bass frequencies. i have tried with other speakers but is the same.
    Any idea what causes this ?
    Below the schematic

    Thanks
    Attached Files
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