Lynx Studio Hilo Reference A/D D/A Converter System - Owner's Manual with LT-USB - Manual (Page 59)

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The wiring method for unbalanced connections with XLR connectors to unbalanced RCA/Phono phone connectors
using coaxial cable (1 wire + shield) is as follows:
XLR Pin 1 (GND) no connection
XLR Pin 2 (+) to signal wire and to the Phono center pin
XLR Pin 3 (-) to the cable shield and to the Phono sleeve
1 2
3
XLR Male
or Female
Single conductor shielded cable
RCA/Phono Plug
(Unbalanced)
5.4 Setting the Monitor Out Level Mode
By default, the Hilo Monitor Outputs are calibrated to a maximum of +10dBu. This is a standard reference level for
powered monitors. If the Monitor Outputs are to be used with powered monitors or a power amp connected to passive
monitors, then this setting is likely appropriate.
If instead, one wishes to connect the Monitor Output to some other professional line level device, then it may be
desirable to set the Monitor Out to its alternate setting, which is +24dBu.
Monitor Output Level Default +10 dBu Monitor Output Level Option +24 dBu
This setting is established with jumpers on the Hilo mainboard. To access them, remove the bottom plate on the Hilo (it
will be necessary to remove one of the rubber feet to accomplish that). The pins in question are labeled Mon Right
Atten (short for Monitor Output Right Channel Attenuation) or Mon Left Atten. Removing the jumpers sets the levels
to the alternate +24dBu mode.
If the desired level is less than +24dBu (+22dBu) for instance, then you can additionally attenuate with the Hilo
Monitor Out volume control.