Detail 01
5 megohm input impedance
It is optimized for piezo pickups and is intended to smooth problematic peaks.
Product detailSKU #1500000285301
Radial EngineeringStageBug SB-4 Compact Active Piezo DI
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Independent shopping perspective
The Korena take
StageBug SB-4 is an active DI built around piezo-equipped instruments. Its 5-megohm input is designed to smooth troublesome piezo peaks and broaden frequency response, while the active buffer balances the signal for PA cable runs up to 100 meters. An XLR output feeds the PA and the auxiliary output can feed a stage amplifier at the same time. On louder stages, use the high-pass filter to reduce excessive low end and the 180° polarity switch to address acoustic hot spots.
Strong match
Who this is for
- Sending a piezo-equipped instrument to a PA while also feeding a stage amplifier.
- Managing excessive low end or acoustic hot spots during amplified live performances.
- Running a balanced piezo signal to a PA over cable lengths up to 100 meters.
Consider the trade-offs
When to look elsewhere
- Setups without 48V phantom power, which the active circuit requires.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
High-pass filter
Reduces excessive bottom end that can contribute to resonance.
Detail 03
180° polarity reverse
Changes the phase relationship between the PA and room acoustics to help reduce acoustic hot spots.
Final check
Know before you order
- 01Provide 48V phantom power at the XLR connection.
- 02Use it only in dry locations between 5°C and 40°C.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Is the SB-4 for piezo pickups?
Yes. It is a piezo-optimized active buffer with a 5-megohm input impedance.
02Can it feed both a PA and stage amplifier?
Yes. It has a standard XLR output for the PA plus an auxiliary output for a stage amplifier.
03How is the SB-4 powered?
It requires 48V phantom power and draws 5mA.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsSound
- Frequency Response
- 20Hz to 20kHz
- Power
- 48V phantom power, 5mA
2 detailsPickups & controls
- Audio Circuit Type
- Piezo optimized active buffer
- Pickup Configuration
- Piezo
1 detailsBody & build
- Construction
- 16 gauge steel chassis & outer shell
6 detailsConnections & power
- Input Impedance
- 5Meg Ohms
- Output Impedance
- 330 Ohms
- Equivalent Input Noise
- -101dBu
- Output Connectors
- XLR
- Maximum Input
- +4dBu
- Input Connectors
- 1/4 inch
2 detailsSize & weight
- Weight
- 0.55
- Shipping Weight
- 0.8 lbs (365 grams)
9 detailsOther
- Size L X W X D
- 4.5 inch x 1,85 inch x 1.35 inch (114mm x 47mm x 34mm)
- Dynamic Range
- 100dB
- Gain
- +2dB
- Phase Deviation
- 10° @ 50Hz
- Intermodulation Distortion
- <0.01%
- Noise
- -97dBu
- Shipping Size L X W X D
- 8 inch x 5 inch x 3 inch (203mm x 127mm x 76mm)
- Conditions
- For use in dry locations only between 5°C and 40°C
- Total Harmonic Distortion
- <0.006%
