by amb » October 17th, 2018, 2:00 am
Are the output MOSFETs all mounted on the Dissipante case heatsinks? If so then an internal fan wouldn’t be much help, and the stacking of amps shouldn’t matter.
If you’re driving speakers, please don’t play at sustained high volumes. After all, β22 is a powerful headphone amp that happens to be robust enough to drive speakers, but only as a light duty power amp for the latter. The TO-220 MOSFETs are too small for high power use, even when used with large heatsinks, because the TO-220’s thermal resistance is not low enough.