Alfatron Surface Mount 100V Stepped Attenuator | 120W

The Alfatron Electronics Surface Mount 100V Stepped Attenuator series is designed for integrators and AV installers working with constant-voltage distributed audio systems. These units pass the amplified 100V line signal directly, using a step-up/step-down controller to give occupants local volume control at each zone endpoint. The series is offered in multiple wattage ratings so installers can select the correct unit for the speaker load in each zone without over- or under-specifying the attenuator.

The surface mount form factor and included back box make these attenuators well suited for classroom, retail, hospitality, house of worship, and commercial office installations where a discreet, wall-mounted volume control is required at individual listening zones. Unlike passive inline attenuators, the signal actively passes through the stepped control, providing consistent level adjustment across the attenuation range. This design approach keeps installations tidy and allows for straightforward replacement or upgrade without rewiring the speaker circuit.

For AV integrators specifying 100V line systems, the Alfatron Electronics stepped attenuator series offers a practical, appropriately rated zone control solution across a range of wattage options, reducing the need for external volume control modules or amplifier channel splitting on smaller distributed audio builds.