XD7000 uses transformer with more headroom to ensure very high reliability. Even when the amplifier is under stress, very heavy load (for example at 2ohms) for long period of times, the amp is still very cool and as you are aware heat is the biggest killer for the amplifiers.

Special SLDDTM sound dynamic processing circuit. An inbuilt 0.5dB-0.8dB limiter delay, variable in delay value over frequencies.The channel gain is automatically reduced, protecting the loudspeakers from potential damage from the high power, continuous square waves that would otherwise be produced. Perfect LXTM input overload limiter protection. The input works differently over varying frequencies and temperatures. This will ensure clean distortion-less sound. Auto Ramp operates every time the amplifier is turned on or is reactivated after a protect condition is corrected.