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Impostazioni filtro
Roll-off rapido
Entrambi i modelli 550C e 650C utilizzano il convertitore digitale-
analogico WM8740 di Wolfson Microelectronics. Il 550C utilizza un
convertitore digitale-analogico stereo, mentre il 650C utilizza due
convertitori digitali-analogici a differenziale doppio (cioè uno per canale,
in modalità bilanciata internamente). Questi componenti di altissima
qualità sono dotati di filtro digitale selezionabile con due impostazioni.
Il filtro a roll-off rapido evidenzia una netta attenuazione della distorsione
delle immagini all’esterno della banda passante (cioè oltre 22,05kHz) a
scapito di un lieve pre e post-transitorio oscillante nel dominio temporale.
Il filtro di roll-off lento fornisce un roll-off più lento e una minore
attenuazione della distorsione delle immagini a distanza ravvicinata con
un transitorio oscillante minore nel dominio temporale.
Non esiste una scelta “giusta” e invitiamo gli utenti a provare entrambi i
filtri e scegliere quello più gradevole all’orecchio. Si riportano di seguito
le caratteristiche di entrambi:
0
-20
-40
-60
-80
0 22.05 44.1
0102030405060
Roll-off lento
0
-20
-40
-60
-80
0 22.05 44.1
0102030405060
Risposta (dB)
Risposta impulsivaRisposta impulsiva
Risposta (dB)
Frequenza (kHz) Tempo (campioni in ingresso)
Tempo (campioni in ingresso)Frequenza (kHz)
10


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Cambridge Audio Azur 550C User Manual - French - 12 pages

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