User guide
Engineer 418 & 818 User Manual  Page 79 
Audio 
INPUTS        -   electronically balanced 
IMPEDANCE      -  > 25k ohms 
CMRR        -  > 70dB 20Hz-20kHz 
OUTPUTS      -   electronically balanced 
SOURCE IMP.      -  < 60 ohms 
MIN. LOAD      -  600 ohm 
MAX. LEVEL      -  +20dBU 
FREQUENCY RESP.    -  +- 0.1dB 8Hz – 20 kHz 
A/D DYNAMIC RANGE    -  > 115dB Unweighted 
D/A DYNAMIC RANGE    -  > 112dB Unweighted 
IN-OUT DYNAMIC RANGE   -  > 110dB Unweighted 
DISTORTION      -  0.0035% @1kHz 0dBU 
MAXIMUM DELAY    -  10ms. /output (increment 2 microseconds.) 
Processing 
AD/DA resolution    -   24 bits 
AD/DA sample rate    -   48 kHz  
Internal processing resolution  -  32 bits floating point 
Software 
OUTPUT GAIN      -  adjustable +12dB to –inf.dB in 0.25dB steps 
INPUT GAIN      -  adjustable +12dB to –inf.dB in 0.25dB steps 
Parametric Equalisation 
FILTERS      -  8 sections per input, 8 sections per output 
FILTER TYPES      -  Bell, Lowshelf, Highshelf, Notch, Bandpass 
FILTERGAIN      -  +12dB to –45dB in 0.25dB steps 
FILTER Q/BW      -  User selectable 0.05 to 20 / 20 to 0.05 
FREQUENCY      -  20Hz – 20kHz 










