Federal Signal's Model 50GCB SelecTone Speaker Amplifier is designed to produce crisp, clear tones, digital voice messages and live public address. Designed to mount in ceilings, the 50GCB features a 7" white grille over a 4" speaker amplifier.

Internal gain control allows output adjustment from 64dB to a maximum of 88dB at 10 feet.

SelecTone Speaker Amplifiers are used individually or as part of a plant–wide emergency notification system. The Model UTM Universal Tone Module, with 32 tones, or the TM33 Custom Tone Module is plugged into a single SelecTone Speaker Amplifier for stand–alone use or into a SelecTone Command Unit for plant–wide signaling.

For plant–wide signaling, a Connector Kit is installed into each SelecTone Speaker Amplifier and wired to a central controller, a SelecTone Command Unit or a CommCenter Digital Message Center. SelecTone Command Units and CommCenter Digital Message Centers can broadcast tones, voice messages, melodies and live public address to an unlimited number of SelecTone Speaker Amplifiers.

The 50GCB is designed for areas without high ambient noise levels, such as offices, hallways and receptions areas. The baffle allows the four–inch speaker to be installed easily in any suspended ceiling plenum with a Model R4NB backbox. The white grill of the 50GCB is attractive in most decors.

Emergency signaling or paging are common applications for SelecTone.