Condenser microphones usually specify different requirements for their phantom power. These ratings can range from 48 Volts all the way down to 9 Volts. Fortunately, theres a certain amount of flexibility with matching Phantom Power voltage to your mic. A rough rule-of-thumb would be more is better.

For example, a 24-volt condenser mic usually works perfectly with a 48 Volt Phantom Power Suppy. Some mics rated at as little as 9 Volts can operate on voltages up to 48 Volts (check with the manufacturer first). Conversely, a mic will generally perform best driven by not less than its rated voltage. So, for a 48 Volt mic, you would get best performance with 48 Volts of Phantom Power. For all the above, check out the Phantom II.

• Input Connectors: 2 x XLR female
• Output Connectors: 2 x XLR male
• Power: Two 9V batteries (included) or an AC adapter
• Dimensions: 5.625" x 1.75" x 3.625" (144mm x 45mm x 92mm)