Radio Design Labs ST MA2 Muting Monitor Amplifier

Radio Design Labs ST-MA2
Muting Monitor Amplifier

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Radio Design Labs ST-MA2

The ST-MA2 is part of a group of products in the STICK-ON series from Radio Design Labs. The durable bottom adhesive permits quick, permanent mounting nearly anywhere or it may be used with RDL's racking accessories. The ST-MA2 offers the ultimate in totally solid-state muting and attenuation switching, with the big plus, you can put it right where you need it!

The ST-MA2 is a compact audio monitor amplifier with control inputs to mute or reduce the gain of its output. This module may be used in conjunction with other RDL modules to configure automatic mixing systems or may be used alone as a single speaker monitor amplifier. The ST-MA2 is typically used to drive a small tabletop or overhead monitor speaker in a conference room, boardroom, courtroom, public forum panel or similar installation. The ST-MA2 is ideally suited for use in automatic mixing systems due to its control inputs.

The line-level input may be wired balanced or unbalanced. The audio output will drive standard speakers from 4 to 45 ohm. Normal gain is preset by means of a trimmer on the module.

Five control inputs are provided. An open-collector, a switch closure, or compatible logic signals may activate each. Typically, an RDL ST-GSP1 Gated Speech Preamplifier controls these inputs. There is a control input which mutes the ST-MA2 output completely. This may be used to prevent feedback if there is a pickup mic associated with the speaker driven by the ST-MA2. Two control terminals are provided to attenuate the ST-MA2 output by 3 dB, and two additional terminals are provided to attenuate the output by 6 dB. These connect from the mic logic (or open-collector) control signals from gated mic preamps for adjacent and second adjacent locations.

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