The Radial Engineering StageBug SB-5 is an ultracompact passive direct box designed for DJs, musicians, and presenters who need a simple, reliable solution for connecting a smartphone, tablet, or laptop to a PA system, a mixing console, or an audio interface. Equipped with two custom-wound transformers, it reduces hum and buzz while allowing long cable runs.
The StageBug SB-5 features a 3.5mm TRS stereo mini plug on an attached 5' cable for direct hookup to your mobile device. Outputs include two 1/4" TRS jacks and a balanced XLR 3-pin male connector. A stereo-to-mono merge function allows easy routing of your stereo source into a mono mixer channel. Use the -15 dB pad to avoid distortion when dealing with high-output content such as mastered tracks.
Thanks to its passive design, the StageBug SB-5 requires no batteries or phantom power. It sports a ground-lift switch to inhibit problematic noise from ground loops. Integrated side-panel hooks enable convenient and tidy cable management.
Specifications:
| Circuit Type | Passive, Transformer-Based Design |
| Number of Channels | 2 |
| Inputs | 1 x 1/8" / 3.5 mm TRS Male Stereo Input (on Attached Cable) |
| Outputs | 2 x 1/4" TRS Female Balanced Outputs 1 x XLR 3-Pin Male Balanced Output |
| Cable Length | 1.5 m |
| Frequency Response | 20 Hz to 20 kHz (±1 dB) |
| Dynamic Range | 100 dB |
| Maximum Input | +20 dB |
| Total Harmonic Distortion | 0.01% at 1 kHz Deviation Phase: 2° at 100 Hz; 5° at 50 Hz |
| Input Impedance | 40 Kilohms (Unbalanced) |
| Output Impedance | 2.8 Kilohms (Balanced) |
| Pad | -15 dB |
| Ground Lift | Switchable |
| Power Requirements | None |
| Operating Temperature | 5 to 40°C |
| Construction | 14-Gauge Steel Chassis and Outer Shell |
| Dimensions | 11.4 x 4.7 x 3.4 cm |
| Weight | 250 g |