The E70 Speakers provide high audio output with clear audibility, and are designed to meet the critical needs of the life safety industry for effective emergency voice communications and tone signaling. The highefficiency speakers are designed for maximum output at a minimum wattage across a frequency range of 400 Hz to 4 kHz.A speaker mounting plate with a built-in level adjustment allows for a faster and easier installation. The two-screw grill cover creates an attractive appearance.