Class D and/or SMPS reliability (MTBF)

[dlaloum]

I doubt most failures occur when the amp is connected to a load that's within its limits. I don't remember hearing or seeing that ClassD do as well with extremely reactive loads and extremely low impedance.

Heat.... lots and lots of small components close together, with limited or no heatsinking... major bits are heatsunk - but the way these modules are set up, most FLIR pictures show hot patches.... on typical AB designs all the "hot bits" get heatsinking...

 

[highfigh]

Heat.... lots and lots of small components close together, with limited or no heatsinking... major bits are heatsunk - but the way these modules are set up, most FLIR pictures show hot patches.... on typical AB designs all the "hot bits" get heatsinking...

And if they fail, it's the fault of the designer(s). If they don't check for hot spots, they're doing a disservice to their customers- no equipment should need additional cooling on its own IMO, and if they determine that some distance is required between the top and sides but the users don't pay attention to that or try to use it in ways that don't allow proper cooling, they really have no grounds for whining.