Radial SB-2 – Passive Mono DI Box

The Radial SB-2 is a professional passive mono direct injection box designed to deliver clean, reliable signal conversion for live sound, touring, and studio applications.

The Radial SB-2 is a professional passive mono direct injection box designed to deliver clean, reliable signal conversion for live sound, touring, and studio applications. Featuring a high-quality Jensen transformer, the SB-2 provides excellent audio isolation, natural sound reproduction, and exceptional reliability without requiring any external power.

Inputs & Outputs:

1 x ¼" Jack input – for instruments and line-level sources
1 x ¼" Jack thru/link output – for connecting to amplifiers or additional equipment
1 x XLR male output – balanced transformer-isolated output for connection to mixing consoles and audio systems

Control Features:

Ground lift switch – helps eliminate hum and ground loop noise
-15dB pad switch – provides additional headroom for high-output sources
Passive operation – no batteries or phantom power required

With Radial’s rugged touring-grade construction and transparent signal handling, the SB-2 is an excellent choice for bass, keyboards, acoustic instruments, playback systems, and other professional audio applications where dependable DI performance is required.