The Radial StageBug SB-4 Active Piezo DI Box is designed for violins, cellos, and other instruments equipped with a piezo pickup. It provides crystal clear audio with no squawks, peaks, or feedback, making it perfect for stage performances and studio recordings. The SB-4 features simple yet powerful control options such as a 180-degree polarity switch for phase alignment and a high pass filter for reducing low-end frequencies. Its plug and play design allows for easy use, and its portable and robust construction ensures durability and protection. With the SB-4, you can guarantee a professional sound for your instruments.
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The SB-4 combines performance with practicality, boasting an ultra-compact design without compromising on quality. It utilizes a high 5 meg ohm impedance to smooth out peaks and eliminate squawks that are common with piezo transducers. This broadens the frequency response, resulting in a balanced and natural sound both on stage and in the studio. The SB-4 can be directly plugged into your PA or tuner via the dedicated AUX input, allowing for long cable runs without signal degradation. It does not require batteries or power cables, making it the ideal companion for piezo-equipped instruments.
Key features of the SB-4 include the ability to effortlessly smooth out peaks and eliminate squawks, an ultra-compact design that fits neatly into instrument cases, a plug and play design that does not require batteries thanks to 48V phantom power, a built-in high pass filter for reducing excessive bass, a buffered 1/4″ AUX out for connecting instruments to an amp or tuner, a 600 ohm balanced output for pristine connection to a mixer or mic preamp, a phase alignment switch for taming hotspots that cause feedback, and a robust construction that protects against knocks and scratches.
The SB-4’s specifications include a piezo optimized active buffer audio circuit type, a frequency response of 20Hz to 20kHz with a ±1.0dB tolerance, a total harmonic distortion rating, a dynamic range of 100dB, a 5Meg Ohms input impedance, a maximum input rating of +4dBu, a +2dB gain, a 330k Ohms output impedance, an equivalent input noise rating of -101dBu, a noise floor rating of -97dBu, inter-modulation distortion, a phase deviation of 10° at 50Hz, and various switches and filters such as a high pass filter, phase reverse, and ground lift.
The SB-4 is constructed with a 16 gauge steel chassis and outer shell, finished with baked enamel. Its dimensions are 4.5″ x 1.85″ x 1.35″ (114mm x 47mm x 34mm), and it weighs 0.55 lbs (250 grams). It is backed by Radial’s 3-year transferable warranty and can be powered by 48V phantom power.
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