Wheelock's Series ET-1080 provides a full range of rugged, high performance speakers specifically designed to meet the critical needs of the life safety industry for voice and tone signaling. Available in compact, aesthetically pleasing package styles, each ET model covers both 25 or 70 volt audio systems. Their high-efficiency design provides improved evacuation signal, such as the "slow whoop" and "code-3". The Series ET provides unequaled performance and installation flexibility at the job site, while minimizing confusion about mounting and performance capabilities.

Series ET-1080 models have IN and OUT wiring terminals that accept two #12 to #18 American Wire Gauge (AWG) wires at each terminal. Audio inputs include a 1.5 uF blocking capacitor for compatibility with standard reverse polarity DC supervision of NAC circuits.