[Electrodynamic]

These might be OK for burps, but that's about it. Take these and look at the Stetsom amps - they do fine on burps but they suck for music because the heatsink cannot dissipate enough heat to effectively cool the amplifier down. That is, assuming that they have the necessary input and output devices in order to support their power claims over an extended period of time (aka: longer than 5 seconds) encased in such a small package, which can't happen. And then there is the reliability factor.