These AAVCC-5 security covers are an excellent deterrent for changes to a calibrated music and paging system. After a sound system has been balanced the knobs of an Atlas Sound amplifier can be removed and replace with these AAVCC-5 covers. The AAVCC-5 are finished in black, embossed with the Atlas Sound badge, and fit near flush with the amplifiers front panel providing little indication of a level control.