Phono stages with adjustable input impedance

Input impedance adjustment

— this adjustment allows you to select the optimal ratio between the output impedance of the pickup and the input impedance of the phono stage. For details on input impedance, see the corresponding paragraphs. Also note here that this function is especially important for MC pickups (see "Intended use"), because. MM-heads usually have a standard resistance of 4.7 kOhm and do not require tuning.