You could let the smoke out of your equipment.... This happened to me with a low end receiver on some high end speakers 2-4 ohm operating impedance... The protection was intact (rear panel fuse), the other protection that caused the unit to be silent would take effect from time to time, but the end result was an early death of the output fets. The only reason this setup was even attempted was my need for music while my amp was out for an upgrade... This may not occur in every circumstance, but I am unlucky enough to find out the consequences. Luckily this unit was under warranty and was replaced for no cost to myself...
