The Pres CPro 100 and CPro 50 will absolutely protect your valuable compression driver from failure due to excessive power input. When in full protect mode, the compression driver will be attenuated by 6dB. Removing the speaker from power for 1 minute will reset the CPro to normal operation.
The CPro 50 was designed to protect the Eminence PSD2002 1" Compression Driver
The CPro 100 was designed to protect the Radian 760 2" Compression Driver