From the Thiel 2.7 Owner’s Information:
"The CS2.7s, like most speakers, require a period of playing before they perform optimally. The time required depends on how loudly the speakers are played; more time is required if played softly, less if played loudly. At least 200 hours at moderately loud levels are required before the speaker is performingnear optimum. You should notice even more improvement after 300-400 hours of playing."