RDL STM-1 Microphone Preamplifier

The RDL STM-1 is an affordable yet high-quality microphone preamplifier perfect for commercial sound and broadcast applications. Its compact design makes it a great choice when space is limited. This preamplifier features a high-performance circuit that offers a fixed 50 dB gain, easily boosting any mic-level signal to line level for most line inputs. It has a single-ended supply input and can operate from 24 to 33 Vdc. You can also use it with 12 Vdc, though it will reduce the headroom by 6 dB. For intercom use, the input can work directly with a speaker. Key features include high or low impedance input, balanced or unbalanced output, phantom capability, RF-filtered inputs and outputs, excellent performance, and the convenience of stick-on installation.

Using the RDL STM-1 is quite straightforward. First, connect your microphone to the input of the preamplifier. You can choose between high or low impedance input according to your needs. Then, connect the output of the preamplifier to your line input device. Make sure to select the appropriate output type, either balanced or unbalanced. For power, connect it to a power source between 24 to 33 Vdc. If you only have a 12 Vdc power source, be aware that the headroom will be reduced by 6 dB. When using it for intercom applications, you can directly connect a speaker to the input. As for maintenance, keep it in a dry and clean place. Regularly check the connections to ensure they are secure. Avoid exposing it to extreme temperatures or humidity. If you notice any issues, contact the manufacturer for further assistance.