Going from one watt or less to two watts with the LCD-2 is like going from night to day, judging from experimentation with the various power tube options in my WA22. But one you reach that power threshold the LCD-2 doesn't really ramp up with additional power. This is from trying them on my HE-6/K1000 speaker amp rig. Once you hit two watts with the LCD-2, it's all about refinement and personal sound signature preference. Once it has adequate power the LCD-2 is incredibly capable of reflecting changes in the source, the amplifier's sound signature, the quality of the recording, various cabling options, tube-rolling, etc. You can accentuate the LCD-2's signature warm sound, you can make them more neutral, you can widen their soundstage, or you can brighten them up by exploring these various options.