For future readers, don’t run amps, especially amps like this, below rated impedance. You can get away with it if you have enough impedance rise, hence the people that claim it works, but they are not designed to handle that amount of current the lower load adds. Amplifiers aren't magic, transistors can only handle so much current, and amps are usually already maxed out at rated impedance.
If a 2-ohm amp could secretly handle 1-ohm by design, the manufacturer will add that to their specs to increase sales. Running amps below rated impedance is often a death sentence. Just because someone says it worked for them, don’t mean you will be lucky as well. If you were hard core competing and you were disabling protection to run insane loads with zero care for blowing stuff up, sure do it, if it’s a daily system, do not do it! I know no one will actually listen to reason, but trying to add to an old thread. 😅