Lewitt B70AS Conference Microphone Base - Integrated Mute Switch with LED

Lewitt B70AS: Put a Mute Button Right at the Talker's Fingertips

The Lewitt B70AS is a conference microphone base with an integrated mute switch, machined from matte-black zinc die-cast metal. Like every base in the series it anchors a modular gooseneck-and-capsule microphone to a table or lectern and passes signal and phantom power through a single balanced connection -- but it adds one thing that changes how a room runs: a mute button, with clear LED feedback, right on the base where the person speaking can reach it. Control stops being something an operator does from a booth and becomes something every participant holds in their own hand.

Local Mute With Visual Confirmation

The defining feature of the B70AS is its onboard mute switch. A single press silences that microphone at the base, and an integrated LED shows its state at a glance -- lit one way when the mic is live, another when it is muted -- so a speaker always knows, without guessing, whether the room can hear them. That certainty matters: it lets a panelist take a private aside, a participant cough or confer without broadcasting it, and a chairperson manage their own line without waving to a technician. The mute happens right at the source, cleanly, with no reliance on a distant mixer.

A Complete Modular Base, Mute Included

Underneath the switch, the B70AS is a full-featured conference base. It is the bottom element of a three-part microphone -- base, gooseneck, and condenser capsule -- and a gooseneck threads into its 3-pin XLR receptacle while the capsule sits on top. It passes 48V phantom power straight up the stack from a single phantom-capable input, so the whole assembly powers cleanly over one cable with no local supply or batteries. Its zinc die-cast body and mechanical isolation decouple the mic from the table, absorbing the bumps, taps, and rumble that would otherwise reach the capsule as noise. Every strength of the plain base is here -- plus the button.

Why Per-Seat Control Changes a Meeting

In a multi-microphone room, open mics that nobody is using pile up noise, echo, and cross-talk, muddying the whole feed. Giving each talker a local mute lets participants keep their own microphone closed until they actually speak, which keeps the room's overall sound clean and intelligible without an operator constantly riding faders. The LED makes the system self-correcting: people can see which mics are live and mute themselves when they are done. For busy panels, council meetings, and hybrid calls, that per-seat control is the difference between a controlled conversation and a wall of open-mic noise.

Where the B70AS Belongs

The B70AS is built for seats where the person speaking should control their own microphone: council chambers and courtrooms where members speak in turn, boardroom tables, panel discussions, houses of worship, and hybrid meeting rooms feeding a video call. Anywhere participants need to mute themselves confidently -- for a private word, a break, or simply to keep an unused mic closed -- the base with the button belongs. Paired with the right gooseneck length and capsule pattern, it delivers clear speech and hands-on control at every position.

Who the B70AS Is For

The B70AS is for the integrator outfitting a room where participants -- not just a central operator -- need to manage their own microphones. If your council, boardroom, or worship space calls for confident, visible, per-seat muting on top of a rock-solid modular base, the B70AS delivers it in one unit. (Note: the B70AS is a base only; a compatible gooseneck and capsule are required to complete the microphone.)