StageBug SB-4™ Specifications

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.

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.