Direct Box (DI-Box) Radial SB-2 Passive

The Radial SB-2 Passive is a passive single-channel DI box ideal for active basses, keyboards, and other instruments with high output levels. Its compact design makes it easy to fit into an instrument case, and its stereo to mono conversion helps you make efficient use of your mixer channels.

At the heart of the SB-2 is the Eclipse ET-DB3 transformer, which provides isolation, impedance matching, and signal balancing. This helps eliminate unwanted noise, such as hum and buzz from ground loops, and adds a warm analog character to the sound.

The device is equipped with a 1/4” input with a through-through (Thru) output for connecting a stage amplifier. When working with instruments with ultra-high output levels, such as active basses or digital pianos, the built-in -15 dB attenuator prevents signal overload.

The XLR output provides professional connection to a mixing console, and the Ground Lift switch eliminates ground noise and interference.

The rugged 14-gauge steel housing ensures protection against mechanical damage, making the SB-2 a reliable choice for stage and studio use.

Features

• Passive circuitry with transformer isolation for clear sound
• Ideal for active basses, acoustic guitars, and keyboards
• Compact body that fits easily into an instrument case
• Stereo to mono fusion for optimal use of mixing channels
• Balanced XLR output for professional connectivity
• 1/4” thru output for connecting amplifiers or tuners
• -15 dB attenuator for working with high signal levels
• Ground Lift to eliminate noise and hum
• Durable steel housing for reliable operation in touring conditions
• Passive design, does not require power supply

User Manual