I own an energy sub. The energy line is virtually identical, with the exception of a few cosmetic differences, to the mirage line and share the same parent company (API). Anyways, in the manual for all the energy subs (S8.3, S10.3, S12.3), it specifically recommends breaking the sub in for at least 50 hours before giving it a serious workout. I'm sure your sub manual will say the same.