Features: Stable voltage doubler rectifier and filter circuit to effectively filter out the AC signal interference Built-in low pass filter circuit design, external audio devices to fully filter out interference noise Rouhuan boot to avoid the sound of the impact of the switch machine Two sets of balanced power supply, the balance of input and output signals, the voltage balance and stability control of common mode interference New shielding technology, power supply and power to separate design, the exchange of electromagnetic waves with the DC power supply is completely isolated to ensure that the signal from any electromagnetic interference Package: 1 x 48V Phantom Power 1 x US Plug Adapter