Owner`s manual
 Wadia 9 Series Decoding Computer System Owner’s Manual 
15
Illuminated Status Indicator 
There is a multi-colored LED at the base of the front of the 921 Mono Decoding 
Computer. This LED indicates the status of the Wadia 921, as follows: 
•  Blue    Unit is in operate mode 
•  Red    Unit is powered up, but in Standby Mode 
•  Flashing Red  Output protection is engaged (contact your dealer) 
921 Mono Decoding Computers Maximum Output Level Setting 
For optimum performance, the 921 output level should be set so that critical listening 
occurs with the volume control near the top of its range, above 70. The Maximum 
Output Level is adjusted by means of a set of switches located on the back panel of 
the Decoding Computer, with 4.4 Volts RMS being the loudest setting. If more than 
one switch is active, the highest voltage setting will override. 
 Output Voltage Table: 
4.4 Volts RMS  Switch 1 On 
2.2 Volts RMS*  Switch 2 On 
1.1 Volt RMS  Switch 3 On 
0.5 Volts RMS  Switch 4 On 
*Factory default setting 
Note: before adjusting the output level, make sure you put the 921 Mono Decoding 
Computers into the Standby Mode. You can put the 9 Series Decoding Computer System 
in the Standby Mode by setting the Wadia 931 volume to zero, and pressing mute on the 
remote control. For more information, see Standby on page 21. 
Output Level
Status Indicator










