How to get balanced inputs working


I have mbl 5011 preamp with a pair of balanced inputs ,when I run dac through it with switch on dac to xlr,which I know is fully balanced , I receive no audio, when I put switch on dac to rca I get. Music don't tell me mbl 5011 has a bogus balance input that's really unbalanced
pavpet
Dac is connected with digital cable to cdp
Is the digital cable RCA or XLR?

And, repeating my earlier question, what is the model number of the DAC?

Regards,
-- Al
The audio horizon dac is the modded 3.0n to svt 90% of there $7400 ref dac it's very very musical and very analog sounding , had the Weiss dac here , mbl , sugden and antelope , beats them very easily , the low level detail scary good
Does the digital cable, that is connected between the DAC and the CDP, have RCA connectors or does it have XLR connectors?

Regards,
-- Al
It appears, as is typically the case, that the XLR/RCA switch on the Audio Horizons 3-series DACs selects between the XLR and RCA digital INPUT connectors, and has nothing to do with which analog output connector is being used. The XLR and RCA analog output connectors are presumably driven simultaneously, as Brf indicated.

So the reason that you hear nothing when "XLR" is selected is that nothing is connected to the XLR digital input connector. The MBL preamp has nothing to do with the issue.

The bottom line: Hey, no problem!

Regards,
-- Al