Description de chez Thomann : - Source Audio SA 272 ZIO Analog Bass Preamp; bass preamp and DI effect pedal, ultra-low noise and distortion preamp, Full tone-shaping control set with FOCUS high pass filter, GRIT and SCOOP modes for added tonal character options, OUTPUT control enables an overall boost of +16 dB and a cut of -6 dB, high-quality components and Burr Brown JFET op-amps, true bypass, controls for output, bass, treble, bypass footswitch, status LED, brushed, anodised aluminium housing, 6.3 mm mono jack input / output, XLR direct output with optional ground lift, headphone output for direct monitoring, power supply via optional 9V DC adapter, 2.1 x 5.5 mm barrel plug, polarity (-) center, battery operation not supported, current draw 200 mA, dimensions (L x W x H) 108 x 89 x 57 mm / 4.5" x 3.5" x 2.25", weight 285 g / 0.63 lbs