The Radial StageBug SB-2™ Passive is a high-performance direct box made for players who are on the move! Made to fit inside of a guitar case, the SB-2 is ultra compact yet is feature-packed to ensure great performance on any stage.The compact design begins with a 1/4" input and thru-put to feed the on-stage amp. This connects to the custom made Eclipse ET-DB3 transformer which performs the impedance matching and balances the signal. When using extra high output instruments, a -15 dB pad can be inserted into the signal path. This enables the SB-2 to be used with active basses and digital pianos that often tend to overload the input side of the interface. An innovative stereo-to-mono merge function provides a convenient way to connect stereo keyboards and computers without having to reset the source for mono operation, saving time and input channels on the PA. The SB-2 output features an XLR wired to the AES standard with pin-2 hot. Once connected, the SB-2 delivers a smooth warm sound reminiscent of older vintage gear.The Eclipse ET-DB3 transformer is magical in its ability to handle extreme signal levels with a natural compression that is pleasing to the ears. The transformer also helps eliminate hum and buzz caused by ground loops by isolating the input from the output. This is augmented with a ground lift switch that lifts pin-1 on the XLR for quiet, professional results.FeaturesPassive DI for bass, acoustic guitar, and keyboardUltra-compact to fit in your guitar casePlug-and-play, easy-to-use feature setTransformer isolation eliminates noiseSwitchable padSpecificationsElectronic:Audio circuit type: Passive, transformer basedTransformer: Eclipse ET-DB3, 12:1 ratioShield: Copper foil# of channels: Single channel (mono)Frequency response: 20Hz ~ 20KHz (± 0.5dB)Dynamic range: 115 dBTotal harmonic distortion: 0.005% @ 1 kHzPhase deviation:3° @ 100 Hz8° @ 50 HzInput Connectors: 1/4"Input impedance: 140 kΩ, unbalancedInput pad: -10 dBMaximum Input: +20 dBOutput Connectors: XLR male out; 1/4" thruOutput impedance: 1 kΩ, XLR balancedAuto merge: Sums left & right sources to monoGround lift: Disconnects pin-1 at XLR outputPhysical:Construction: 14-gauge steel chassis & outer shellDimensions (H x W x D): 1.35" x 1.85" x 4.5" (34 x 47 x 114 mm)Weight:0.55 lbs (250 g)Power: Passive, no power requiredEnvironment Operating Conditions: for use in dry locations only between 41° F and 104° F (5° C and 40° C) Radial Engineering SB-2 Compact Passive Direct Box for Bass and Keyboards.