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Declared sound power level, bels
C746 C748 X746 X748
ADF mono copy Not applicable Not applicable 7.4 7.5
ADF mono scan Not applicable Not applicable 7.2 7.4
Idle/ready 4.8 4.8 5.0 4.9
Printing (duplex
color)
6.9 6.9 7.2 7.1
Printing (duplex
mono)
6.9 6.9 7.2 7.2
Printing (simplex
color)
6.8 6.9 7.1 7.1
Printing (simplex
mono)
6.8 6.8 7.1 7.3
Quiet mode printing
(simplex color)
6.3 6.3 6.5 6.4
Quiet mode printing
(simplex mono)
6.3 6.3 6.5 6.4
Quiet mode printing
(duplex color)
Not applicable Not applicable 6.5 6.4
Quiet mode printing
(duplex mono)
Not applicable Not applicable 6.5 6.4
Note: Measurements apply to 300‑dpi, 600‑dpi, and 1200‑IQ printing.
Electrical specifications
Printer model Electrical specification
C746 SFP low‑voltage models 100–110 V at 50–60Hz, nominal
90–121 V, extreme
C748 SFP low‑voltage models 110–127 V at 50–60Hz, nominal
99–139.7 V, extreme
C746, C748 SFP high‑voltage models 220–240 V at 50–60Hz, nominal
198–259 V, extreme
X746, X748 MFP low‑voltage models 100–127 V at 50–60Hz, nominal
90–135 V, extreme
X746, X748 MFP high‑voltage models 220–240 V at 50–60Hz, nominal
198–254 V, extreme
Warning—Potential Damage: Do not use voltage converters with printers.
Printer specifications 19