It is balanced or not?

...well is gonna be the same.

@auxinput I do not understand why it can not be balanced by having a mono and bridge option, it is very rare, that amplifier has been used for many years in professional studios and has even been described as almost high-end. Did you see any diagram of that amplifier to know those details?

@auxinput I fond it here: http://bee.mif.pg.gda.pl/ciasteczkowypotwor/SM_scena/Crown/D75%20Service%20Manual%20%20-1.pdf it is just as you were saying, but please tell me, it is better to use it as a stereo then? thanks.

Running the sound through the JBL MSC1 is definitely going to degrade the sound quality of the Emotiva DAC, but if that's all you have, that's what you are gonna have to use. 

Is the amp better to use as stereo?  Generally speaking, yes.  It really depends on the speakers and if they drop below 8 ohms, but usually stereo amps do not perform as well in bridged mode.

Generally, a dedicated balanced/differential amp will have power from both the +(RED) and -(BLACK) speaker posts.  In this situation, you cannot bridge amp channels because they are already, in a sense, bridged. 

The service manual does not give a complete schematic, but if you look at page 6-3, you can see the Output Stage schematic.  On the right side of the schematic you can see the output connected to one speaker binding post.  The other speaker binding post is shunted directly to ground, so this is a single ended amp (even though the input stage is balanced).

Too many sources and amps are really SE main circuitry with opamps on the input or output to make them pseudo balanced (xlr) just to suck in the xlr freaks.

In these cases stick with SE, and you bypass these opamps (best opamp is no opamp). You only need balanced (xlr) if your running 10mts of interconnect through bad surroundings with lots of rf emitting equipment.
Cheers George