Apex Electronics

Different condenser microphones specify different amounts of required phantom power. As a rule these ratings can range from 48 volts all the way down to 9 volts. Fortunately there is some flexibility in terms of matching phantom voltage to your mic. A rough rule of thumb would be "more is better". For example, a 24-volt condenser mic will run perfectly on 48 volts. In fact mics rated at as little as 9 volts can often operate on 48 volts, but you might want to check with the manufacturer first. Conversely, a mic will generally perform best driven by not less than its rated voltage so, for a 48V mic, you would obtain best results with 48 volts of phantom power.
Features

* Phantom power = 48VDC +/- 2VDC
* Input Connector = XLR female
* Output connector = XLR male
* Output Noise = -71 dBV
* Frequency Response = 10Hz - 25kHz
* Power = adaptor included
* Current Drain - 14mA
* Size - 5.25" x 2.75" x 1.75" (130mm x 74mm x 45mm)
* Weight - 1lb (450g)