Description: -3 Models: 35, 60, And 100 Watts4 Inputs: 1 Mic, 1 Aux, 1 Tel, Plus 1 Selectable Mic Or AuxEach Input Controlled By An Independent Volume ControlTreble And Bass ControlsAux Muting By External Contact Closure For Push-To-Talk MicrophonesTel Input For Telephone Paging ApplicationsTel Input Voice-Activated (Vox) Mute Over Aux InputVariable Threshold For Tel Input Voice-Activated Aux MuteOutputs For 4-Ohm (Direct), 8-Ohm (C35 C60 Models Only), And 16-Ohm, 25V And 70V Speaker Systems (Transformer Coupled)Output Jack To Connect A Recording Device Or Booster AmplifierOutput Jack To Connect A General-Purpose 600-Ohm Matching Transformer (Model Wmt1a)Thermal Protection And Electronic ShutdownRack Mountable With Accessory Mounting Kit (Model Rpk50)Listed To Ul Standard 60065 For Us And Canada