hi Gerald. We covered this during class ? there is no charges or fees for the first 10, which will complete your certification. After that you are required to purchase a $25 plaque to give to your customer, with each calibration submitted via the thx.com web site. This is not applicable for post production staff and also for commercial calibrations (only professional calibration services provided to consumers). You need to submit 4 calibrations annually to maintain your certification (assuming you are also purchasing 4 plaques annually).
