The ST-MPA2 from RDL is a miniature wall and surface mount microphone phantom power adapter, containing two identical phantom power circuits and a common power supply input. If only one input is to be converted for phantom operation, only one circuit needs to be used.
Each circuit has a microphone input and a microphone output. Phantom voltage appears on each of the input terminals. There is no voltage on the output terminals. Therefore, the ST-MPA2 can convert any existing microphone input into a phantom powered input.
The power supply input terminals may be fed with any DC voltage from 6 volts to 52 volts. The unit has an internal pass transistor-regulator filter circuit which permits this incoming voltage to be adjusted to the desired phantom voltage, up to 92% of the supply input voltage. A multi-turn trimming potentiometer is provided for adjusting to the correct phantom voltage.
The ST-MPA2 requires a ground-referenced, 24 to 33Vdc @ 30mA power source.
- Two phantom power adapters in one compact module
- Provides the ability to add phantom powered microphones to standard inputs
- Phantom conversion with full frequency response
- Fully adjustable phantom voltage
- Highly-filtered phantom power