But the reason I suggest higher power amps it that damping factor is usually tied to output capability. A device that is capable of high current is necessarily going to have low output impedance. SET amps usually have relatively high output impedance, so they are somewhat sensitive to their load. But I've found SET amps that are much less load sensitive than others, and even some 3 watt models will work just fine with the Theater Series three π loudspeakers.