I am researching options for building a highly efficient audio system for use with solar power. The goal is to obtain as much quality audio as possible from minimal energy input, such as 25 watts or less. The amp I am considering is based on the Tripath TA 2024 chipset. See http://www.michael.mardis.com/sonic/start.html for details. I am looking to find a good set of efficient speakers with >93db sensitivity to match this amp. Something with good midrange performance at around 7-8 watts per channel would be ideal.

Do you have any recommendations for a pi speaker?