Radial USB-PRO

The Radial USB-Pro is a stereo DI box that takes audio straight from a laptop's USB port and delivers two balanced XLR outputs. The computer's own headphone output is bypassed, along with its noise and level problems. The box has a level control and a headphone output, so the presenter or DJ can check a track before it goes to the room. It is rented for conferences, theatre and DJs playing from a laptop.

Choose the USB-Pro when the computer is the main audio source and quality matters, for example theatre cues, backing tracks at a concert or a long conference day. The Palmer PLI 04 USB does the same job and adds analogue inputs, but has no headphone output. If there are many presenters each arriving with a headphone cable, the passive Radial ProAV2 is more flexible, as it does not require selecting an audio device on the computer.