Topping Pre90 este un preamplificator de înaltă performanță bazat pe circuite complet simetrice și module NFCA de înaltă putere. De asemenea, dispune de un afișaj digital ușor de utilizat pe panoul frontal.
Pre90 este echipat cu o memorie de volum independentă pentru fiecare intrare sau ieșire.Dacă sunt conectate mai multe intrări cu niveluri diferite, schimbarea intrării active necesită adesea ajustarea nivelului de volum.Memoria de volum permite ajustarea automată a ultimilor parametri salvați pentru fiecare intrare.Există, de asemenea, opțiunea de a utiliza această memorie pentru ieșiri pentru a ajusta nivelul la amplificatoarele țintă.
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