When the class d amps go out, it is many times due to a few small electrolytic capacitors aging and going off spec.
Repair patterns emerge.
Class D amplifiers are very hard on some of the capacitors and other components in their designs, and age rapidly with no signs of immanent failure. This is a generalization but it is a potent part of the high failure and low lifespan, in general, of class D products. Manufacturers love this built in timed fuse aspect. Don't expect them to get rid of pulse power systems any time soon.
Old school amplifiers, due to how they stress components, can generally last 2-3-4-6 times longer.
Repair patterns emerge.
Class D amplifiers are very hard on some of the capacitors and other components in their designs, and age rapidly with no signs of immanent failure. This is a generalization but it is a potent part of the high failure and low lifespan, in general, of class D products. Manufacturers love this built in timed fuse aspect. Don't expect them to get rid of pulse power systems any time soon.
Old school amplifiers, due to how they stress components, can generally last 2-3-4-6 times longer.