USB-Mobile

Name: USB-Mobile
Brand: Radial Engineering
Availability: OnlineOnly

DI Box

Audio Interface

Active DI for smartphones and tablets—USB input, dual XLR outputs, charges iOS devices while playing back audio.

The USB-Mobile bridges mobile devices to professional audio systems, accepting USB input from smartphones, tablets, and media players while outputting two channels of balanced analog audio over XLR connectors. iOS compatibility includes device charging during use, keeping phones and tablets powered through long events.

A USB Type-A port connects to devices via Lightning cable (iOS) or microUSB/USB-C adapters (Android), routing digital audio through an onboard DAC to balanced outputs. Level control adjusts output gain to feed mic- or line-level inputs, while a mono sum switch collapses stereo to mono when needed. The ground lift eliminates hum from ground loops, and a 3.5mm headphone jack allows monitoring.

Designed for backing tracks, presentations, and DJ applications where mobile devices are the source. The $299 price point targets the professional mobile DJ and event production market where reliability and balanced outputs justify the investment over consumer adapters.