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Radial Engineering


Radial StageBug SB-4 Piezo DI

The Radial StageBug SB-4 Piezo DI is an active DI box optimised for piezo style instrument pickups used with guitars, violins and other stringed and fretted instruments. One of the key features of the SB-4 is that it has a very high (5meg ohm) input impedance to match piezo pickups; maximising the clarity and frequency response they are capable of reproducing. The SB-4 also has a high-pass filter switch, and phase reverse switch.

    • Radial StageBug SB-4 PRODUCT FEATURES:

      The Radial StageBug SB-4 is an active direct box that has been optimized for use with piezo electric transducers such as used on classical guitar, violin, mandolin and upright bass. It features a high 5-meg-ohm input impedance that at once broadens the frequency response while reducing the peaks and squaw that are commonly encountered with piezo devices. This is augmented with a high pass filter that gently rolls off excessive bass. The unique AUX output is buffered to enable high impedance sources to feed pedals and amplifiers without interacting with the input impedance. Extra attention has been paid to the circuit design to ensure exceptional performance resulting in less than 0.01% distortion throughout the critical listening range and a noise floor that approaches -100dB. These features combine to make the Radial StageBug SB-4 a excellent solution for orchestral and acoustic instruments of all types.

      - Active DI optimized for piezo transducers
      - Smoothes out peaks, eliminates squawk
      - High pass filter eliminates resonance
      - Ultra compact to fit in your guitar case

      Audio circuit type: Piezo optimized active buffer
      Frequency response: 20Hz to 20kHz
      Total harmonic distortion: <0.006%
      Dynamic range: 100dB
      Input impedance: 5Meg Ohms
      Maximum input: +4dBu
      Gain: +2dB
      Output impedance: 330R Ohms
      Equivalent input noise: -101dBu
      Noise floor: -97dBu
      Intermodulation distortion: <0.01%
      Phase deviation: 10° @ 50Hz
      Switches: High Pass Filter, Phase, Ground Lift
      Low-cut filter: 150 Hz
      Filter slope: 6dB/octave
      Instrument input: ¼" buffered with piezo optimized load
      Auxilary output: ¼" buffered to drive guitar effects, amplifier or tuner
      Balanced output: Pin-1 ground, pin-2 (+), pin-3 (-)
      Polarity reverse: 180°
      Ground lift: Soft lift with 100 Ohms to ground
      Construction: 16 gauge steel chassis & outer shell
      Finish: Durable powder coat
      Size: (L x W x D) 4.5" x 1,85" x 1.35" (114mm x 47mm x 34mm)
      Weight: 0.55 lbs (250 grams)
      Shipping size: (L x W x D): 8" x 5" x 3" (203mm x 127mm x 76mm)
      Shipping weight: 0.8 lbs (365 grams)
      Power requirement: 48V phantom power, 5mA
      Conditions: For use in dry locations only between 5°C and 40°C
      Warranty: Radial 3-year, transferable
      Specifications are subject to change without notice.

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