RADIAL BOITE DIRECT AVEC PHANTOM POWER PIEZO SB-4
Discover a pure, balanced sound with the Radial SB-4 Piezo direct box, a great match for your acoustic instruments. This active box is powered by the mixer's 48 V phantom supply and has a 5 megohm input.
Why It's a Good Choice
The Radial SB-4 Piezo is designed specifically for acoustic instruments fitted with piezo pickups. It also runs on phantom power, which removes the need for batteries and simplifies your rig.
It is a compact active direct box, small enough to store in the instrument case. Its 5 megohm input softens the harsh peaks typical of piezo transducers and widens the frequency response. The active circuit balances the signal, which can then travel through up to 100 metres of cable to the mixer.
Who Is It For?
- Acoustic musicians looking for better sound quality
- Studio and stage artists who want to simplify their gear
- Classical guitar, resonator (dobro) or upright bass plugged straight into the piezo pickup, with no preamp
Key Features
- High-pass filter that tames low-end resonance, the kind that makes the instrument vibrate and causes feedback.
- 180 degree polarity reverse switch to reduce acoustic hot spots on stage.
- Ground lift that lets the 48 V through and removes about 95% of ground loop noise.
- Buffered auxiliary output for a stage amp, a pedal or a processor.
Specifications
| Circuit type | Active buffer optimized for piezo pickups |
|---|---|
| Input impedance | 5 megohms |
| Output impedance | 330 ohms |
| Frequency response | 20 Hz to 20 kHz |
| Dynamic range | 100 dB |
| Gain | +2 dB |
| Total harmonic distortion | Less than 0.006% |
| Maximum input level | +4 dBu |
| Connectors | 1/4 in. input, XLR output, auxiliary output |
| Functions | 180° polarity reverse, ground lift, high-pass filter |
| Power | 48 V phantom, 5 mA |
| Dimensions | 114 x 47 x 34 mm (4.5 x 1.85 x 1.35 in.) |
| Enclosure | 16 gauge steel |
| Weight | 250 g (0.55 lb) |
| Warranty | Radial, 3 years, transferable |
Frequently Asked Questions
- Can the SB-4 run on a battery or a power adapter?
- No. It draws its current only from the 48 V phantom power supplied by the PA; without a mixer, you need an external phantom supply such as the Radial SB-48.
- How does it differ from the StageBug SB-1?
- The two boxes are very much alike. The SB-4 input is built for piezo pickups, while the SB-1 is aimed at acoustic guitars and passive or active basses.
- What cable length should you use?
- The cable between the instrument and the input should stay under about 6 m (20 ft). On the output side, the balanced signal reaches the mixer over a distance of up to 100 m.
Avis clients
Is your SB-4 mostly for classical guitar, resonator or upright bass? Let us know.
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