Radial SB-5 LAPTOP | StageBug SB-5 Laptop Direct Injection Box

The Radial StageBug SB-5 Laptop Direct Injection (DI) Box is the ultimate audio solution for amplifying signals from laptops, tablets, and other consumer audio products through a professional PA system. Designed specifically to meet the needs of sound engineers, audio-visual technicians, media managers, and traveling musicians, the SB-5 offers a seamless, plug-and-play experience without compromising quality. Whether you're setting up for a live performance, a corporate event, or a multimedia presentation, this compact DI box ensures crystal-clear sound by eliminating common audio problems such as hum and buzz.

One of the standout features of the StageBug SB-5 is its passive design, negating the need for an external power source. Equipped with an integral 1.5m (5-foot) cable terminated with a standard 3.5mm (1/8-inch) stereo connector, the SB-5 easily connects to the headphone output of your device. The cable includes a clamping strain relief and wraps around a sidewinder cleat for hassle-free storage. Inside the box, a pair of custom-wound transformers balance the audio signals for long cable runs—up to 100 meters (300 feet)—with minimal noise. This transformer isolation is critical in eliminating ground loops, ensuring your audio signal remains pristine and free of interference.

Versatility is another hallmark of the SB-5, featuring multiple output options. You can choose between a stereo set of 1/4-inch TRS jacks for full stereo operation or an XLR out that automatically sums the left-right program material to mono—perfect for PA systems with limited channels. Additionally, a -15dB input pad allows you to connect high-output sources without clipping or distortion, providing added flexibility in various audio environments. The combination of robust features makes the Radial StageBug SB-5 the ideal choice for any professional needing reliable and high-quality audio performance from their laptop or mobile device.

Key Features

• Stereo direct box for laptop computer
• Integral 1.5m cable with sidewinder cleat
• Transformer isolation eliminates noise
• Plug & play easy to use - no power required

Specifications

• Audio circuit type: Passive, transformer based
• Number of channels: Two channels, mono or stereo outputs
• Frequency response: 20Hz ~ 20KHz (-+ 1dB)
• Dynamic range: 100dB
• Maximum input: +20dB
• Total harmonic distortion: 0.01% @ 1kHz
• Phase deviation: 2 degrees @ 100Hz; 5 degrees @ 50Hz
• Input impedance: 40k Ohms, unbalanced
• Output impedance: 2.8k Ohms, balanced

Package Contents

• Radial SB-5 LAPTOP StageBug DI Box
• Integral 1.5m (5-foot) cable with 3.5mm (1/8-inch) stereo connector
• User manual
• Warranty card