Watts. The output power of an amplifier is never specified in joules. Joules refers to the amount of energy storage that is in the filter capacitors of the power supply. Generally a higher number is better, but will not tell you much except in comparison to other amplifiers of similar power.
Being that there are a variety of other things that can also affect the way an amplifier sounds, I would not put too much weight on joules alone. Like any other human endeavor, it pays to educate one's self about what is possible rather than hang your hat on one specification over all others!
Above all have fun!
Being that there are a variety of other things that can also affect the way an amplifier sounds, I would not put too much weight on joules alone. Like any other human endeavor, it pays to educate one's self about what is possible rather than hang your hat on one specification over all others!
Above all have fun!