The Lars amp can only output 10W in to 8 ohms. wouldn't it clip or negligible distortion increased at high volume level ?
The solution for flea-watt amps is to drive efficient speakers. e.g. Lyrita's 2 Watt 2A3 integrated amp happily driving an efficient speaker like a Rethm Sadhana. In my experience, it produced enough SPL (and music) to fill up a room that must be around 12 foot wide and at least 20 foot in length. I couldn't believe so little watt produced so much sound.
This reminds me of audio designer Nelson Pass' thought that the first watt is the most important watt (hence the name FirstWatt for his DIY designs which he open sources). If the first watt is no good, subsequent watts can't improve the sound, is his thought.