Radial Engineering StageBug SB-2 Passive Direct Box

BH #RASB2PASSIVE • MFR #R800 0120
Radial Engineering
Radial Engineering StageBug SB-2 Passive Direct Box
Key Features
  • Connects an Instrument to a Mic Input
  • Delivers a Warm, Smooth Sound
  • Switchable -15 dB Pad
  • Eclipse ET-DB3 Transformer
The Radial Engineering StageBug SB-2 is an ultracompact passive direct box designed for guitarists, bass players, and keyboardists who need a simple, reliable DI that can fit in a case or gig bag. Equipped with an Eclipse ET-DB3 transformer, it delivers a warm, vintage-flavored tone while reducing hum and buzz.
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$69.99
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Radial Engineering SB-2 Overview

The Radial Engineering StageBug SB-2 is an ultracompact passive direct box designed for guitarists, bass players, and keyboardists who need a simple, reliable DI that can fit in a case or gig bag. Equipped with an Eclipse ET-DB3 transformer, it delivers a warm, vintage-flavored tone while reducing hum and buzz.

The StageBug SB-2 features an unbalanced 1/4" Hi-Z input, a 1/4" thru jack, and a balanced XLR 3-pin male output. A stereo-to-mono merge function allows easy routing of a stereo source such as a synth or digital piano into a mono mixer channel. Use the -15 dB pad to avoid distortion when dealing with high-output instruments including electric guitars and basses with active pickups.

Thanks to its passive design, the StageBug SB-2 requires no batteries or phantom power. It sports a ground-lift switch to inhibit problematic noise from ground loops.

Passive DI for bass, acoustic, and keyboard
Ultracompact form factor to fit in your guitar case
Delivers a smooth, warm sound reminiscent of older vintage gear
Transformer isolation eliminates noise
1/4" input and thru jack to feed your on-stage amp
Custom-made Eclipse ET-DB3 transformer performs the impedance matching and balances the signal
-15 dB pad avoids distortion when dealing with high-output instruments such as active basses and digital pianos
Stereo-to-mono merge function provides a convenient way to connect stereo keyboards and computers without having to reset the source for mono operation
XLR wired to the AES standard (pin 2 hot)
Ground-lift switch lifts pin 1 on the XLR for quiet results
UPC: 676101040650

Radial Engineering SB-2 Specs

Circuit TypePassive, Transformer-Based Design
Number of Channels1
Inputs1 x 1/4" TS Female Unbalanced Input
Outputs1 x 1/4" TS Female Unbalanced Thru
1 x XLR 3-Pin Male Balanced Output
Frequency Response20 Hz to 20 kHz (±0.5 dB)
Dynamic Range115 dB
Maximum Input+20 dB
Total Harmonic Distortion0.005% at 1 kHz
DeviationPhase:
3° at 100 Hz; 8° at 50 Hz
Input Impedance140 Kilohms (Unbalanced)
Output Impedance1 Kilohm (Balanced)
TransformerEclipse ET-DB3, 12:1 Ratio
Pad-15 dB
Ground LiftSwitchable
Power RequirementsNone
Operating Temperature41 to 104°F / 5 to 40°C
Construction14-Gauge Steel Chassis and Outer Shell
Dimensions (L x W x D)4.5 x 1.9 x 1.4" / 11.4 x 4.7 x 3.4 cm
Weight8.8 oz / 250 g
Packaging Info
Package Weight0.65 lb
Box Dimensions (LxWxH)8.1 x 4.6 x 1.7"
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