From the user manual of the Pass Labs INT-25 integrated amplifier:
The amplifier is stable into any load which does not dip below 0.5 ohms, but it will protect itself by shutting off any channel which outputs more than 10 amps (200 watts peak into 2 ohms)
Remember, the Pass INT-25 is rated at only 2x25w per channel but its stable down to 200 watts @ 2Ohms :) Not all watts are equal watts