So far so good.
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Which your amp is not rated for and will cause it turn burn out given enough time.
Highly unlikely. For one thing we're talking Crown here, and more generally a pro audio amp from a highly reputable, exeprienced source. More generally yet, we are talking about a modern power amp - one designed and built to the general standards of this millenium, not 4 decades ago.
The power amp's manfacturer's major goals in life are to have a good reputation for reliability and compatibilty and minimize warranty costs. No way will they field a product that they haven't checked out thoroughly from the perspective of damage (long or short term) from a likely operational situation like too many speakers of the wrong kind in parallel.
If there is was only manufacturer in the business that knows how to do this it would be Crown. But there are many, with QSC quickly coming to mind.
There are a host of safeguards, documented and undocumented, built into this and any mainstream power amp that will keep it from being burned out by something as common as a 2 ohm load.
So what will happen if you load an modern amplifier with a load with too low of an impedance? In some cases, it will simply refuse to fully power up. If it powers up, it may simply put out less power than is optimal. If it runs too hot it will shut itself off, probably during the loudest passages.
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One thing I am wondering, if if you cant get sound from the second channel maybe you have the amp set to bridged and not stereo mode?
That's not how bridging is usually implemented. There are two steps to bridging a power amp - reversing the polarity of the signal to one channel, and the other is connecting the speaker across the plus terminals instead of from plus to minus. Both amps get the same amplitude signal, neither goes silent. Usually the speaker connection change is implemented by extenal connections, not some hidden internal switch.
IOW with bridging there is always a signal from the second channel, and that signal is present whether you connect the speakers from plus to minus, or plus to plus.